Merge branch 'dev' into feature/sync

This reverts commit da018fc64d.

.github/workflows/main.yml

@@ -13,10 +13,10 @@ jobs:
     - name: Check out source code
       uses: actions/checkout@v1
 
-    - name: Install Java Development Kit 11
+    - name: Install Java Development Kit 1.8
       uses: actions/setup-java@v1
       with:
-        java-version: 11
+        java-version: 1.8
 
     - name: Build Project
       run: ./build.sh build

README.md

@@ -90,7 +90,7 @@ contribute, even if you are not a software developer.
   is already completed, you are also very welcome to join and proofread it.
 
 * **Write some code.** If you are an Android developer, you are very welcome to
-  contribute with code. Please see the [guidelines](https://github.com/iSoron/uhabits/blob/dev/docs/GUIDELINES.md).
+  contribute with code. Please see `docs/GUIDELINES.md`.
 
 ## License
 

build.gradle.kts

@@ -1,11 +1,11 @@
 plugins {
-    val kotlinVersion = "1.6.10"
-    id("com.android.application") version ("7.0.3") apply (false)
+    val kotlinVersion = "1.5.0"
+    id("com.android.application") version ("4.2.0") apply (false)
     id("org.jetbrains.kotlin.android") version kotlinVersion apply (false)
     id("org.jetbrains.kotlin.kapt") version kotlinVersion apply (false)
     id("org.jetbrains.kotlin.android.extensions") version kotlinVersion apply (false)
     id("org.jetbrains.kotlin.multiplatform") version kotlinVersion apply (false)
-    id("org.jlleitschuh.gradle.ktlint") version "10.3.0"
+    id("org.jlleitschuh.gradle.ktlint") version "10.1.0"
 }
 
 apply {
@@ -15,9 +15,11 @@ apply {
 allprojects {
     repositories {
         google()
+        jcenter()
         mavenCentral()
         maven(url = "https://plugins.gradle.org/m2/")
         maven(url = "https://oss.sonatype.org/content/repositories/snapshots/")
-        maven(url = "https://jitpack.io")
+        maven(url = "https://kotlin.bintray.com/ktor")
+        maven(url = "https://kotlin.bintray.com/kotlin-js-wrappers")
     }
 }

docs/BUILD.md

@@ -33,7 +33,7 @@ The repository will be downloaded to the directory `uhabits`.
 2. When the IDE asks you for the project location, select `uhabits` and click "Ok".
 3. Android Studio will spend some time indexing the project. When this is complete, click the toolbar icon "Sync Project with Gradle File", located near the right corner of the top toolbar.
 4. The operation will likely fail several times due to missing Android SDK components. Each time it fails, click the link "Install missing platforms", "Install build tools", etc, and try again.
-5. To test the application, create a virtual Android device using the menu "Tools" and "AVD Manager". The default options should work fine, but feel free to customize the device.
+5. To test the application, create a virtual Android device using the menu "Tools" and "AVD Manager". The default options should work fine, but free to customize the device.
 6. Click the menu "Run" and "uhabits-android". The application should launch.
 
 

gradle.properties

@@ -1,5 +1,5 @@
 org.gradle.parallel=false
 org.gradle.daemon=true
-org.gradle.jvmargs=-Xms2048m -Xmx2048m
+org.gradle.jvmargs=-Xms2048m -Xmx2048m -XX:MaxPermSize=2048m
 android.useAndroidX=true
 android.enableJetifier=true

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.0-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

settings.gradle.kts

@@ -1,6 +1,7 @@
 pluginManagement {
     repositories {
         gradlePluginPortal()
+        jcenter()
         google()
     }
     resolutionStrategy.eachPlugin {

uhabits-android/build.gradle.kts

@@ -1,3 +1,5 @@
+
+
 /*
  * Copyright (C) 2016-2021 Álinson Santos Xavier <git@axavier.org>
  *
@@ -18,7 +20,7 @@
  */
 
 plugins {
-    id("com.github.triplet.play") version "3.7.0"
+    id("com.github.triplet.play") version "3.5.0"
     id("com.android.application")
     id("org.jetbrains.kotlin.android")
     id("org.jetbrains.kotlin.kapt")
@@ -32,15 +34,15 @@ tasks.compileLint {
 
 android {
 
-    compileSdk = 31
+    compileSdkVersion(30)
 
     defaultConfig {
-        versionCode = 20003
-        versionName = "2.0.3"
-        minSdk = 23
-        targetSdk = 31
-        applicationId = "org.isoron.uhabits"
-        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+        versionCode(20003)
+        versionName("2.0.3")
+        minSdkVersion(23)
+        targetSdkVersion(30)
+        applicationId("org.isoron.uhabits")
+        testInstrumentationRunner("androidx.test.runner.AndroidJUnitRunner")
     }
 
     signingConfigs {
@@ -56,7 +58,7 @@ android {
 
     buildTypes {
         getByName("release") {
-            isMinifyEnabled = true
+            minifyEnabled(true)
             proguardFiles(getDefaultProguardFile("proguard-android.txt"), "proguard-rules.txt")
             if (signingConfigs.findByName("release") != null) {
                 signingConfig = signingConfigs.getByName("release")
@@ -68,7 +70,7 @@ android {
         }
     }
 
-    lint {
+    lintOptions {
         isCheckReleaseBuilds = false
         isAbortOnError = false
         disable("GoogleAppIndexingWarning")
@@ -86,10 +88,10 @@ android {
 }
 
 dependencies {
-    val daggerVersion = "2.42"
-    val kotlinVersion = "1.7.0"
-    val kxCoroutinesVersion = "1.6.3"
-    val ktorVersion = "1.6.8"
+    val daggerVersion = "2.38.1"
+    val kotlinVersion = "1.5.21"
+    val kxCoroutinesVersion = "1.5.1"
+    val ktorVersion = "1.6.2"
     val espressoVersion = "3.4.0"
 
     androidTestImplementation("androidx.test.espresso:espresso-contrib:$espressoVersion")
@@ -98,17 +100,17 @@ dependencies {
     androidTestImplementation("com.linkedin.dexmaker:dexmaker-mockito:2.28.1")
     androidTestImplementation("io.ktor:ktor-client-mock:$ktorVersion")
     androidTestImplementation("io.ktor:ktor-jackson:$ktorVersion")
-    androidTestImplementation("androidx.annotation:annotation:1.4.0")
+    androidTestImplementation("androidx.annotation:annotation:1.2.0")
     androidTestImplementation("androidx.test.ext:junit:1.1.3")
     androidTestImplementation("androidx.test.uiautomator:uiautomator:2.2.0")
     androidTestImplementation("androidx.test:rules:1.4.0")
     androidTestImplementation("com.nhaarman.mockitokotlin2:mockito-kotlin:2.2.0")
     compileOnly("javax.annotation:jsr250-api:1.0")
     coreLibraryDesugaring("com.android.tools:desugar_jdk_libs:1.1.5")
-    implementation("com.github.AppIntro:AppIntro:6.2.0")
+    implementation("com.github.paolorotolo:appintro:4.1.0")
     implementation("com.google.code.findbugs:jsr305:3.0.2")
     implementation("com.google.dagger:dagger:$daggerVersion")
-    implementation("com.google.guava:guava:31.1-android")
+    implementation("com.google.guava:guava:30.1.1-android")
     implementation("io.ktor:ktor-client-android:$ktorVersion")
     implementation("io.ktor:ktor-client-core:$ktorVersion")
     implementation("io.ktor:ktor-client-jackson:$ktorVersion")
@@ -116,11 +118,12 @@ dependencies {
     implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlinVersion")
     implementation("org.jetbrains.kotlinx:kotlinx-coroutines-android:$kxCoroutinesVersion")
     implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:$kxCoroutinesVersion")
-    implementation("androidx.appcompat:appcompat:1.4.2")
+    implementation("androidx.appcompat:appcompat:1.3.1")
     implementation("androidx.legacy:legacy-preference-v14:1.0.0")
     implementation("androidx.legacy:legacy-support-v4:1.0.0")
-    implementation("com.google.android.material:material:1.6.1")
-    implementation("com.opencsv:opencsv:5.6")
+    implementation("com.google.android.material:material:1.4.0")
+    implementation("com.google.zxing:core:3.4.1")
+    implementation("com.opencsv:opencsv:5.5.1")
     implementation(project(":uhabits-core"))
     kapt("com.google.dagger:dagger-compiler:$daggerVersion")
     kaptAndroidTest("com.google.dagger:dagger-compiler:$daggerVersion")

uhabits-android/src/androidTest/java/org/isoron/uhabits/acceptance/HabitsTest.kt

@@ -55,7 +55,6 @@ import org.junit.runner.RunWith
 @RunWith(AndroidJUnit4::class)
 @LargeTest
 class HabitsTest : BaseUserInterfaceTest() {
-
     @Test
     @Throws(Exception::class)
     fun shouldCreateHabit() {
@@ -181,8 +180,6 @@ class HabitsTest : BaseUserInterfaceTest() {
         longPressCheckmarks("Wake up early", count = 2)
         clickText("Wake up early")
         verifyShowsScreen(SHOW_HABIT)
-        // TODO: find a better way than sleeping in tests
-        Thread.sleep(2001L)
         verifyDisplaysText("10%")
     }
 
@@ -197,8 +194,6 @@ class HabitsTest : BaseUserInterfaceTest() {
         verifyDoesNotDisplayText("Track time")
         verifyDisplaysText("Wake up early")
         longPressCheckmarks("Wake up early", count = 1)
-        // TODO: find a better way than sleeping in tests
-        Thread.sleep(2001L)
         verifyDoesNotDisplayText("Wake up early")
         clickMenu(TOGGLE_COMPLETED)
         verifyDisplaysText("Track time")

uhabits-android/src/androidTest/java/org/isoron/uhabits/acceptance/steps/CommonSteps.kt

@@ -18,8 +18,7 @@
  */
 package org.isoron.uhabits.acceptance.steps
 
-import android.os.Build
-import android.os.Build.VERSION.SDK_INT
+import android.os.Build.VERSION
 import androidx.annotation.StringRes
 import androidx.recyclerview.widget.RecyclerView
 import androidx.test.espresso.Espresso
@@ -134,7 +133,7 @@ object CommonSteps : BaseUserInterfaceTest() {
     @Throws(Exception::class)
     fun verifyOpensWebsite(url: String?) {
         var browserPkg = "org.chromium.webview_shell"
-        if (SDK_INT <= Build.VERSION_CODES.M) {
+        if (VERSION.SDK_INT <= 23) {
             browserPkg = "com.android.browser"
         }
         assertTrue(device.wait(Until.hasObject(By.pkg(browserPkg)), 5000))
@@ -179,22 +178,6 @@ object CommonSteps : BaseUserInterfaceTest() {
         EditHabitSteps.clickSave()
     }
 
-    fun changeFrequencyToDaily(habitName: String) {
-        clickText(habitName)
-        Espresso.onView(ViewMatchers.withId(R.id.action_edit_habit)).perform(ViewActions.click())
-        EditHabitSteps.pickDailyFrequency()
-        EditHabitSteps.clickSave()
-        pressBack()
-    }
-
-    fun changeFrequencyToMonthly(habitName: String) {
-        clickText(habitName)
-        Espresso.onView(ViewMatchers.withId(R.id.action_edit_habit)).perform(ViewActions.click())
-        EditHabitSteps.pickMonthFrequency()
-        EditHabitSteps.clickSave()
-        pressBack()
-    }
-
     enum class Screen {
         LIST_HABITS, SHOW_HABIT, EDIT_HABIT, SELECT_HABIT_TYPE
     }

uhabits-android/src/androidTest/java/org/isoron/uhabits/acceptance/steps/EditHabitSteps.kt

@@ -36,24 +36,6 @@ object EditHabitSteps {
         Espresso.onView(ViewMatchers.withText("SAVE")).perform(ViewActions.click())
     }
 
-    fun pickMonthFrequency() {
-        Espresso.onView(ViewMatchers.withId(R.id.boolean_frequency_picker))
-            .perform(ViewActions.click())
-        Espresso.onView(ViewMatchers.withId(R.id.xTimesPerMonthRadioButton))
-            .perform(ViewActions.click())
-        Espresso.onView(ViewMatchers.withId(R.id.xTimesPerMonthTextView))
-            .perform(ViewActions.replaceText("1"))
-        Espresso.onView(ViewMatchers.withText("SAVE")).perform(ViewActions.click())
-    }
-
-    fun pickDailyFrequency() {
-        Espresso.onView(ViewMatchers.withId(R.id.boolean_frequency_picker))
-            .perform(ViewActions.click())
-        Espresso.onView(ViewMatchers.withId(R.id.everyDayRadioButton))
-            .perform(ViewActions.click())
-        Espresso.onView(ViewMatchers.withText("SAVE")).perform(ViewActions.click())
-    }
-
     fun pickColor(color: Int) {
         Espresso.onView(ViewMatchers.withId(R.id.colorButton)).perform(ViewActions.click())
         BaseUserInterfaceTest.device.findObject(By.descStartsWith(String.format("Color %d", color)))

uhabits-android/src/androidTest/java/org/isoron/uhabits/acceptance/steps/ListHabitsSteps.kt

@@ -120,12 +120,6 @@ object ListHabitsSteps {
         BaseUserInterfaceTest.device.waitForIdle()
     }
 
-    fun changeSort(sortText: String) {
-        clickViewWithId(R.id.action_filter)
-        Espresso.onView(ViewMatchers.withText("Sort")).perform(ViewActions.click())
-        Espresso.onView(ViewMatchers.withText(sortText)).perform(ViewActions.click())
-    }
-
     enum class MenuItem {
         ABOUT, HELP, SETTINGS, EDIT, DELETE, ARCHIVE, TOGGLE_ARCHIVED, UNARCHIVE, TOGGLE_COMPLETED, ADD
     }

uhabits-android/src/androidTest/java/org/isoron/uhabits/acceptance/steps/WidgetSteps.kt

@@ -18,7 +18,7 @@
  */
 package org.isoron.uhabits.acceptance.steps
 
-import android.os.Build.VERSION.SDK_INT
+import android.os.Build.VERSION
 import androidx.test.uiautomator.UiScrollable
 import androidx.test.uiautomator.UiSelector
 import junit.framework.Assert.assertFalse
@@ -50,6 +50,13 @@ object WidgetSteps {
     private fun openWidgetScreen() {
         val h = BaseUserInterfaceTest.device.displayHeight
         val w = BaseUserInterfaceTest.device.displayWidth
+        if (VERSION.SDK_INT <= 21) {
+            BaseUserInterfaceTest.device.pressHome()
+            BaseUserInterfaceTest.device.waitForIdle()
+            BaseUserInterfaceTest.device.findObject(UiSelector().description("Apps")).click()
+            BaseUserInterfaceTest.device.findObject(UiSelector().description("Apps")).click()
+            BaseUserInterfaceTest.device.findObject(UiSelector().description("Widgets")).click()
+        } else {
             val listId = "com.android.launcher3:id/widgets_list_view"
             BaseUserInterfaceTest.device.pressHome()
             BaseUserInterfaceTest.device.waitForIdle()
@@ -59,13 +66,14 @@ object WidgetSteps {
                 button = BaseUserInterfaceTest.device.findObject(UiSelector().text("Widgets"))
             }
             button.click()
-        if (SDK_INT >= 28) {
+            if (VERSION.SDK_INT >= 28) {
                 UiScrollable(UiSelector().resourceId(listId))
                     .scrollForward()
             }
             UiScrollable(UiSelector().resourceId(listId))
                 .scrollIntoView(UiSelector().text("Checkmark"))
         }
+    }
 
     @Throws(Exception::class)
     fun verifyCheckmarkWidgetIsShown() {

uhabits-android/src/androidTest/java/org/isoron/uhabits/activities/habits/list/views/EntryButtonViewTest.kt

@@ -36,7 +36,6 @@ class EntryButtonViewTest : BaseViewTest() {
     lateinit var view: CheckmarkButtonView
 
     var toggled = false
-    var edited = false
 
     @Before
     override fun setUp() {
@@ -44,8 +43,7 @@ class EntryButtonViewTest : BaseViewTest() {
         view = component.getEntryButtonViewFactory().create().apply {
             value = Entry.NO
             color = PaletteUtils.getAndroidTestColor(5)
-            onToggle = { _, _, _ -> toggled = true }
-            onEdit = { edited = true }
+            onToggle = { toggled = true }
         }
         measureView(view, dpToPixels(48), dpToPixels(48))
     }
@@ -72,28 +70,20 @@ class EntryButtonViewTest : BaseViewTest() {
     fun testClick_withShortToggleDisabled() {
         prefs.isShortToggleEnabled = false
         view.performClick()
-        assertTrue(!toggled and edited)
+        assertFalse(toggled)
     }
 
     @Test
     fun testClick_withShortToggleEnabled() {
         prefs.isShortToggleEnabled = true
         view.performClick()
-        assertTrue(toggled and !edited)
+        assertTrue(toggled)
     }
 
     @Test
-    fun testLongClick_withShortToggleDisabled() {
-        prefs.isShortToggleEnabled = false
+    fun testLongClick() {
         view.performLongClick()
-        assertTrue(toggled and !edited)
-    }
-
-    @Test
-    fun testLongClick_withShortToggleEnabled() {
-        prefs.isShortToggleEnabled = true
-        view.performLongClick()
-        assertTrue(!toggled and edited)
+        assertTrue(toggled)
     }
 
     private fun assertRendersCheckedExplicitly() {

uhabits-android/src/androidTest/java/org/isoron/uhabits/activities/habits/list/views/EntryPanelViewTest.kt

@@ -77,7 +77,7 @@ class EntryPanelViewTest : BaseViewTest() {
     @Test
     fun testToggle() {
         val timestamps = mutableListOf<Timestamp>()
-        view.onToggle = { t, _, _, _ -> timestamps.add(t) }
+        view.onToggle = { t, _ -> timestamps.add(t) }
         view.buttons[0].performLongClick()
         view.buttons[2].performLongClick()
         view.buttons[3].performLongClick()
@@ -88,7 +88,7 @@ class EntryPanelViewTest : BaseViewTest() {
     fun testToggle_withOffset() {
         val timestamps = mutableListOf<Timestamp>()
         view.dataOffset = 3
-        view.onToggle = { t, _, _, _ -> timestamps += t }
+        view.onToggle = { t, _ -> timestamps += t }
         view.buttons[0].performLongClick()
         view.buttons[2].performLongClick()
         view.buttons[3].performLongClick()

uhabits-android/src/androidTest/java/org/isoron/uhabits/activities/habits/list/views/NumberButtonViewTest.kt

@@ -24,7 +24,6 @@ import androidx.test.filters.MediumTest
 import org.hamcrest.CoreMatchers.equalTo
 import org.hamcrest.MatcherAssert.assertThat
 import org.isoron.uhabits.BaseViewTest
-import org.isoron.uhabits.core.models.NumericalHabitType
 import org.isoron.uhabits.utils.PaletteUtils
 import org.junit.Before
 import org.junit.Test
@@ -43,7 +42,6 @@ class NumberButtonViewTest : BaseViewTest() {
         super.setUp()
         view = component.getNumberButtonViewFactory().create().apply {
             units = "steps"
-            targetType = NumericalHabitType.AT_LEAST
             threshold = 100.0
             color = PaletteUtils.getAndroidTestColor(8)
             onEdit = { edited = true }
@@ -76,10 +74,10 @@ class NumberButtonViewTest : BaseViewTest() {
     }
 
     @Test
-    fun testRender_atMostAboveThreshold() {
+    fun testRender_emptyUnits() {
         view.value = 500.0
-        view.targetType = NumericalHabitType.AT_MOST
-        assertRenders(view, "$PATH/render_at_most_above.png")
+        view.units = ""
+        assertRenders(view, "$PATH/render_unitless.png")
     }
 
     @Test
@@ -88,13 +86,6 @@ class NumberButtonViewTest : BaseViewTest() {
         assertRenders(view, "$PATH/render_below.png")
     }
 
-    @Test
-    fun testRender_atMostBetweenThresholds() {
-        view.value = 110.0
-        view.targetType = NumericalHabitType.AT_MOST
-        assertRenders(view, "$PATH/render_at_most_between.png")
-    }
-
     @Test
     fun testRender_zero() {
         view.value = 0.0
@@ -102,21 +93,15 @@ class NumberButtonViewTest : BaseViewTest() {
     }
 
     @Test
-    fun testRender_atMostBelowThreshold() {
-        view.value = 0.0
-        view.targetType = NumericalHabitType.AT_MOST
-        assertRenders(view, "$PATH/render_at_most_below.png")
+    fun testClick_shortToggleDisabled() {
+        prefs.isShortToggleEnabled = false
+        view.performClick()
+        assertFalse(edited)
     }
 
     @Test
-    fun testRender_emptyUnits() {
-        view.value = 500.0
-        view.units = ""
-        assertRenders(view, "$PATH/render_unitless.png")
-    }
-
-    @Test
-    fun testClick() {
+    fun testClick_shortToggleEnabled() {
+        prefs.isShortToggleEnabled = true
         view.performClick()
         assertTrue(edited)
     }

uhabits-android/src/androidTest/java/org/isoron/uhabits/activities/habits/list/views/NumberPanelViewTest.kt

@@ -24,7 +24,6 @@ import androidx.test.filters.MediumTest
 import org.hamcrest.CoreMatchers.equalTo
 import org.hamcrest.MatcherAssert.assertThat
 import org.isoron.uhabits.BaseViewTest
-import org.isoron.uhabits.core.models.NumericalHabitType
 import org.isoron.uhabits.core.models.Timestamp
 import org.isoron.uhabits.utils.PaletteUtils
 import org.junit.After
@@ -56,7 +55,6 @@ class NumberPanelViewTest : BaseViewTest() {
             buttonCount = 4
             color = PaletteUtils.getAndroidTestColor(7)
             units = "steps"
-            targetType = NumericalHabitType.AT_LEAST
             threshold = 5000.0
         }
         view.onAttachedToWindow()
@@ -76,7 +74,7 @@ class NumberPanelViewTest : BaseViewTest() {
     @Test
     fun testEdit() {
         val timestamps = mutableListOf<Timestamp>()
-        view.onEdit = { t -> timestamps.plusAssign(t) }
+        view.onEdit = { timestamps.plusAssign(it) }
         view.buttons[0].performLongClick()
         view.buttons[2].performLongClick()
         view.buttons[3].performLongClick()
@@ -87,7 +85,7 @@ class NumberPanelViewTest : BaseViewTest() {
     fun testEdit_withOffset() {
         val timestamps = mutableListOf<Timestamp>()
         view.dataOffset = 3
-        view.onEdit = { t -> timestamps += t }
+        view.onEdit = { timestamps += it }
         view.buttons[0].performLongClick()
         view.buttons[2].performLongClick()
         view.buttons[3].performLongClick()

uhabits-android/src/androidTest/java/org/isoron/uhabits/activities/habits/show/views/SubtitleCardViewTest.kt

@@ -53,6 +53,8 @@ class SubtitleCardViewTest : BaseViewTest() {
                 isNumerical = false,
                 question = "Did you meditate this morning?",
                 reminder = Reminder(8, 30, EVERY_DAY),
+                unit = "",
+                targetValue = 0.0,
                 theme = LightTheme(),
             )
         )

uhabits-android/src/androidTest/java/org/isoron/uhabits/performance/PerformanceTest.kt

@@ -61,7 +61,7 @@ class PerformanceTest : BaseAndroidTest() {
         val habit = fixtures.createEmptyHabit()
         for (i in 0..4999) {
             val timestamp: Timestamp = Timestamp(i * DAY_LENGTH)
-            CreateRepetitionCommand(habitList, habit, timestamp, 1, "").run()
+            CreateRepetitionCommand(habitList, habit, timestamp, 1).run()
         }
         db.setTransactionSuccessful()
         db.endTransaction()

uhabits-android/src/androidTest/java/org/isoron/uhabits/regression/ListHabitsRegressionTest.kt

@@ -21,12 +21,9 @@ package org.isoron.uhabits.regression
 
 import androidx.test.filters.LargeTest
 import org.isoron.uhabits.BaseUserInterfaceTest
-import org.isoron.uhabits.acceptance.steps.CommonSteps
 import org.isoron.uhabits.acceptance.steps.CommonSteps.Screen.EDIT_HABIT
 import org.isoron.uhabits.acceptance.steps.CommonSteps.Screen.LIST_HABITS
 import org.isoron.uhabits.acceptance.steps.CommonSteps.Screen.SELECT_HABIT_TYPE
-import org.isoron.uhabits.acceptance.steps.CommonSteps.changeFrequencyToDaily
-import org.isoron.uhabits.acceptance.steps.CommonSteps.changeFrequencyToMonthly
 import org.isoron.uhabits.acceptance.steps.CommonSteps.clickText
 import org.isoron.uhabits.acceptance.steps.CommonSteps.createHabit
 import org.isoron.uhabits.acceptance.steps.CommonSteps.launchApp
@@ -40,12 +37,9 @@ import org.isoron.uhabits.acceptance.steps.EditHabitSteps.clickSave
 import org.isoron.uhabits.acceptance.steps.EditHabitSteps.typeName
 import org.isoron.uhabits.acceptance.steps.ListHabitsSteps.MenuItem.ADD
 import org.isoron.uhabits.acceptance.steps.ListHabitsSteps.MenuItem.DELETE
-import org.isoron.uhabits.acceptance.steps.ListHabitsSteps.changeSort
 import org.isoron.uhabits.acceptance.steps.ListHabitsSteps.clickMenu
 import org.isoron.uhabits.acceptance.steps.ListHabitsSteps.longPressCheckmarks
-import org.isoron.uhabits.core.models.Entry.Companion.NO
 import org.isoron.uhabits.core.models.Entry.Companion.UNKNOWN
-import org.isoron.uhabits.core.models.Entry.Companion.YES_AUTO
 import org.isoron.uhabits.core.models.Entry.Companion.YES_MANUAL
 import org.junit.Test
 
@@ -89,37 +83,4 @@ class ListHabitsRegressionTest : BaseUserInterfaceTest() {
         offsetHeaders()
         verifyDisplaysCheckmarks("Wake up early", listOf(UNKNOWN, UNKNOWN, UNKNOWN, UNKNOWN))
     }
-
-    /**
-     * https://github.com/iSoron/uhabits/issues/1131
-     */
-    @Test
-    @Throws(Exception::class)
-    fun should_refresh_sort_after_habit_edit() {
-        launchApp()
-        verifyShowsScreen(LIST_HABITS)
-        changeSort("By score")
-        changeSort("By status")
-        longPressCheckmarks("Meditate", count = 1)
-        changeFrequencyToMonthly("Read books")
-        longPressCheckmarks("Read books", count = 2)
-        longPressCheckmarks("Read books", count = 1)
-        verifyDisplaysCheckmarks("Meditate", listOf(YES_AUTO, YES_MANUAL, YES_AUTO, YES_MANUAL))
-        CommonSteps.verifyDisplaysTextInSequence(
-            "Wake up early",
-            "Read books",
-            "Meditate",
-            "Track time"
-        )
-
-        changeFrequencyToDaily("Meditate")
-
-        verifyDisplaysCheckmarks("Meditate", listOf(NO, YES_MANUAL, UNKNOWN, YES_MANUAL))
-        CommonSteps.verifyDisplaysTextInSequence(
-            "Wake up early",
-            "Meditate",
-            "Read books",
-            "Track time",
-        )
-    }
 }

uhabits-android/src/androidTest/java/org/isoron/uhabits/sync/RemoteSyncServerTest.kt

@@ -0,0 +1,154 @@
+/*
+ * Copyright (C) 2016-2021 Álinson Santos Xavier <git@axavier.org>
+ *
+ * This file is part of Loop Habit Tracker.
+ *
+ * Loop Habit Tracker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * Loop Habit Tracker is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.isoron.uhabits.sync
+
+import androidx.test.filters.MediumTest
+import com.fasterxml.jackson.databind.ObjectMapper
+import io.ktor.client.HttpClient
+import io.ktor.client.engine.mock.MockEngine
+import io.ktor.client.engine.mock.MockRequestHandleScope
+import io.ktor.client.engine.mock.respond
+import io.ktor.client.engine.mock.respondError
+import io.ktor.client.engine.mock.respondOk
+import io.ktor.client.features.json.JsonFeature
+import io.ktor.client.request.HttpRequestData
+import io.ktor.client.request.HttpResponseData
+import io.ktor.http.HttpStatusCode
+import io.ktor.http.fullPath
+import io.ktor.http.headersOf
+import kotlinx.coroutines.runBlocking
+import org.isoron.uhabits.BaseAndroidTest
+import org.isoron.uhabits.core.sync.AbstractSyncServer
+import org.isoron.uhabits.core.sync.GetDataVersionResponse
+import org.isoron.uhabits.core.sync.KeyNotFoundException
+import org.isoron.uhabits.core.sync.RegisterReponse
+import org.isoron.uhabits.core.sync.ServiceUnavailable
+import org.isoron.uhabits.core.sync.SyncData
+import org.junit.Test
+
+@MediumTest
+class RemoteSyncServerTest : BaseAndroidTest() {
+
+    private val mapper = ObjectMapper()
+    val data = SyncData(1, "Hello world")
+
+    @Test
+    fun when_register_succeeds_should_return_key() = runBlocking {
+        val server = server("/register") {
+            respondWithJson(RegisterReponse("ABCDEF"))
+        }
+        assertEquals("ABCDEF", server.register())
+    }
+
+    @Test(expected = ServiceUnavailable::class)
+    fun when_register_fails_should_raise_correct_exception() = runBlocking {
+        val server = server("/register") {
+            respondError(HttpStatusCode.ServiceUnavailable)
+        }
+        server.register()
+        return@runBlocking
+    }
+
+    @Test
+    fun when_get_data_version_succeeds_should_return_version() = runBlocking {
+        server("/db/ABC/version") {
+            respondWithJson(GetDataVersionResponse(5))
+        }.apply {
+            assertEquals(5, getDataVersion("ABC"))
+        }
+        return@runBlocking
+    }
+
+    @Test(expected = ServiceUnavailable::class)
+    fun when_get_data_version_with_server_error_should_raise_exception() = runBlocking {
+        server("/db/ABC/version") {
+            respondError(HttpStatusCode.InternalServerError)
+        }.apply {
+            getDataVersion("ABC")
+        }
+        return@runBlocking
+    }
+
+    @Test(expected = KeyNotFoundException::class)
+    fun when_get_data_version_with_invalid_key_should_raise_exception() = runBlocking {
+        server("/db/ABC/version") {
+            respondError(HttpStatusCode.NotFound)
+        }.apply {
+            getDataVersion("ABC")
+        }
+        return@runBlocking
+    }
+
+    @Test
+    fun when_get_data_succeeds_should_return_data() = runBlocking {
+        server("/db/ABC") {
+            respondWithJson(data)
+        }.apply {
+            assertEquals(data, getData("ABC"))
+        }
+        return@runBlocking
+    }
+
+    @Test(expected = KeyNotFoundException::class)
+    fun when_get_data_with_invalid_key_should_raise_exception() = runBlocking {
+        server("/db/ABC") {
+            respondError(HttpStatusCode.NotFound)
+        }.apply {
+            getData("ABC")
+        }
+        return@runBlocking
+    }
+
+    @Test
+    fun when_put_succeeds_should_not_raise_exceptions() = runBlocking {
+        server("/db/ABC") {
+            respondOk()
+        }.apply {
+            put("ABC", data)
+        }
+        return@runBlocking
+    }
+
+    private fun server(
+        expectedPath: String,
+        action: MockRequestHandleScope.(HttpRequestData) -> HttpResponseData
+    ): AbstractSyncServer {
+        return RemoteSyncServer(
+            httpClient = HttpClient(MockEngine) {
+                install(JsonFeature)
+                engine {
+                    addHandler { request ->
+                        when (request.url.fullPath) {
+                            expectedPath -> action(request)
+                            else -> error("unexpected call: ${request.url.fullPath}")
+                        }
+                    }
+                }
+            },
+            preferences = prefs
+        )
+    }
+
+    private fun MockRequestHandleScope.respondWithJson(content: Any) =
+        respond(
+            mapper.writeValueAsBytes(content),
+            headers = headersOf("Content-Type" to listOf("application/json"))
+        )
+}

uhabits-android/src/androidTest/java/org/isoron/uhabits/widgets/CheckmarkWidgetTest.kt

@@ -24,8 +24,8 @@ import android.widget.FrameLayout
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import androidx.test.filters.MediumTest
 import org.hamcrest.CoreMatchers
-import org.hamcrest.CoreMatchers.equalTo
 import org.hamcrest.CoreMatchers.`is`
+import org.hamcrest.CoreMatchers.equalTo
 import org.hamcrest.MatcherAssert.assertThat
 import org.isoron.uhabits.BaseViewTest
 import org.isoron.uhabits.R

uhabits-android/src/main/AndroidManifest.xml

@@ -17,12 +17,13 @@
   ~ with this program. If not, see <http://www.gnu.org/licenses/>.
   -->
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
     package="org.isoron.uhabits">
 
-    <uses-permission android:name="android.permission.BROADCAST_CLOSE_SYSTEM_DIALOGS" />
-    <uses-permission android:name="android.permission.SCHEDULE_EXACT_ALARM" />
     <uses-permission android:name="android.permission.VIBRATE" />
     <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.INTERNET" />
 
     <application
         android:name=".HabitsApplication"
@@ -41,6 +42,14 @@
                 android:value=".activities.habits.list.ListHabitsActivity" />
         </activity>
 
+        <activity
+            android:name=".activities.sync.SyncActivity"
+            android:exported="true">
+            <meta-data
+                android:name="android.support.PARENT_ACTIVITY"
+                android:value=".activities.settings.SettingsActivity" />
+        </activity>
+
         <meta-data
             android:name="com.google.android.backup.api_key"
             android:value="AEdPqrEAAAAI6aeWncbnMNo8E5GWeZ44dlc5cQ7tCROwFhOtiw" />
@@ -49,11 +58,21 @@
             android:name=".activities.habits.list.ListHabitsActivity"
             android:exported="true"
             android:label="@string/main_activity_title"
-            android:launchMode="singleTop" />
+            android:launchMode="singleTop">
+            <tools:validation testUrl="https://loophabits.org/sync/123" />
+            <intent-filter android:autoVerify="true">
+                <action android:name="android.intent.action.VIEW" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.BROWSABLE" />
+                <data
+                    android:scheme="https"
+                    android:host="loophabits.org"
+                    android:pathPrefix="/sync" />
+            </intent-filter>
+        </activity>
 
         <activity-alias
             android:name=".MainActivity"
-            android:exported="true"
             android:label="@string/main_activity_title"
             android:launchMode="singleTop"
             android:targetActivity=".activities.habits.list.ListHabitsActivity">
@@ -86,7 +105,6 @@
 
         <activity
             android:name=".widgets.activities.HabitPickerDialog"
-            android:exported="true"
             android:theme="@style/Theme.AppCompat.Light.Dialog">
             <intent-filter>
                 <action android:name="android.appwidget.action.APPWIDGET_CONFIGURE" />
@@ -95,7 +113,6 @@
 
         <activity
             android:name=".widgets.activities.BooleanHabitPickerDialog"
-            android:exported="true"
             android:theme="@style/Theme.AppCompat.Light.Dialog">
             <intent-filter>
                 <action android:name="android.appwidget.action.APPWIDGET_CONFIGURE" />
@@ -104,7 +121,6 @@
 
         <activity
             android:name=".widgets.activities.NumericalHabitPickerDialog"
-            android:exported="true"
             android:theme="@style/Theme.AppCompat.Light.Dialog">
             <intent-filter>
                 <action android:name="android.appwidget.action.APPWIDGET_CONFIGURE" />
@@ -121,11 +137,10 @@
 
         <activity
             android:name=".widgets.activities.NumericalCheckmarkWidgetActivity"
-            android:excludeFromRecents="true"
-            android:exported="true"
             android:label="NumericalCheckmarkWidget"
             android:noHistory="true"
-            android:theme="@style/Theme.Transparent">
+            android:excludeFromRecents="true"
+            android:theme="@style/Theme.AppCompat.Light.Dialog">
             <intent-filter>
                 <action android:name="org.isoron.uhabits.ACTION_SHOW_NUMERICAL_VALUE_ACTIVITY" />
             </intent-filter>
@@ -133,14 +148,13 @@
 
         <activity
             android:name=".notifications.SnoozeDelayPickerActivity"
+            android:taskAffinity=""
             android:excludeFromRecents="true"
             android:launchMode="singleInstance"
-            android:taskAffinity=""
             android:theme="@android:style/Theme.Translucent.NoTitleBar" />
 
         <receiver
             android:name=".widgets.CheckmarkWidgetProvider"
-            android:exported="true"
             android:label="@string/checkmark">
             <intent-filter>
                 <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
@@ -158,7 +172,6 @@
 
         <receiver
             android:name=".widgets.HistoryWidgetProvider"
-            android:exported="true"
             android:label="@string/history">
             <intent-filter>
                 <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
@@ -171,7 +184,6 @@
 
         <receiver
             android:name=".widgets.ScoreWidgetProvider"
-            android:exported="true"
             android:label="@string/score">
             <intent-filter>
                 <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
@@ -184,7 +196,6 @@
 
         <receiver
             android:name=".widgets.StreakWidgetProvider"
-            android:exported="true"
             android:label="@string/streaks">
             <intent-filter>
                 <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
@@ -197,7 +208,6 @@
 
         <receiver
             android:name=".widgets.FrequencyWidgetProvider"
-            android:exported="true"
             android:label="@string/frequency">
             <intent-filter>
                 <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
@@ -210,7 +220,6 @@
 
         <receiver
             android:name=".widgets.TargetWidgetProvider"
-            android:exported="true"
             android:label="@string/target">
             <intent-filter>
                 <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
@@ -221,17 +230,13 @@
                 android:resource="@xml/widget_target_info" />
         </receiver>
 
-        <receiver
-            android:name=".receivers.ReminderReceiver"
-            android:exported="true">
+        <receiver android:name=".receivers.ReminderReceiver">
             <intent-filter>
                 <action android:name="android.intent.action.BOOT_COMPLETED" />
             </intent-filter>
         </receiver>
 
-        <receiver android:name=".receivers.WidgetReceiver"
-            android:exported="true"
-            android:permission="false">
+        <receiver android:name=".receivers.WidgetReceiver">
             <intent-filter>
                 <category android:name="android.intent.category.DEFAULT" />
                 <action android:name="org.isoron.uhabits.ACTION_SET_NUMERICAL_VALUE" />
@@ -282,7 +287,7 @@
         <!-- Locale/Tasker -->
         <receiver
             android:name=".automation.FireSettingReceiver"
-            android:exported="false">
+            android:exported="true">
             <intent-filter>
                 <action android:name="com.twofortyfouram.locale.intent.action.FIRE_SETTING" />
             </intent-filter>

uhabits-android/src/main/java/org/isoron/platform/gui/AndroidDataView.kt

@@ -49,12 +49,23 @@ class AndroidDataView(
     override fun onShowPress(e: MotionEvent?) = Unit
 
     override fun onSingleTapUp(e: MotionEvent?): Boolean {
-        return handleClick(e, true)
+        val x: Float
+        val y: Float
+        try {
+            val pointerId = e!!.getPointerId(0)
+            x = e.getX(pointerId)
+            y = e.getY(pointerId)
+        } catch (ex: RuntimeException) {
+            // Android often throws IllegalArgumentException here. Apparently,
+            // the pointer id may become invalid shortly after calling
+            // e.getPointerId.
+            return false
+        }
+        view?.onClick(x / canvas.innerDensity, y / canvas.innerDensity)
+        return true
     }
 
-    override fun onLongPress(e: MotionEvent?) {
-        handleClick(e)
-    }
+    override fun onLongPress(e: MotionEvent?) = Unit
 
     override fun onScroll(
         e1: MotionEvent?,
@@ -126,22 +137,4 @@ class AndroidDataView(
             }
         }
     }
-
-    private fun handleClick(e: MotionEvent?, isSingleTap: Boolean = false): Boolean {
-        val x: Float
-        val y: Float
-        try {
-            val pointerId = e!!.getPointerId(0)
-            x = e.getX(pointerId)
-            y = e.getY(pointerId)
-        } catch (ex: RuntimeException) {
-            // Android often throws IllegalArgumentException here. Apparently,
-            // the pointer id may become invalid shortly after calling
-            // e.getPointerId.
-            return false
-        }
-        if (isSingleTap) view?.onClick(x / canvas.innerDensity, y / canvas.innerDensity)
-        else view?.onLongClick(x / canvas.innerDensity, y / canvas.innerDensity)
-        return true
-    }
 }

uhabits-android/src/main/java/org/isoron/uhabits/activities/common/dialogs/CheckmarkPopup.kt

@@ -1,127 +0,0 @@
-/*
- * Copyright (C) 2016-2021 Álinson Santos Xavier <git@axavier.org>
- *
- * This file is part of Loop Habit Tracker.
- *
- * Loop Habit Tracker is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by the
- * Free Software Foundation, either version 3 of the License, or (at your
- * option) any later version.
- *
- * Loop Habit Tracker is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-package org.isoron.uhabits.activities.common.dialogs
-
-import android.app.Dialog
-import android.content.Context
-import android.view.LayoutInflater
-import android.view.View
-import android.view.View.GONE
-import android.view.View.VISIBLE
-import org.isoron.uhabits.R
-import org.isoron.uhabits.core.models.Entry.Companion.NO
-import org.isoron.uhabits.core.models.Entry.Companion.SKIP
-import org.isoron.uhabits.core.models.Entry.Companion.UNKNOWN
-import org.isoron.uhabits.core.models.Entry.Companion.YES_AUTO
-import org.isoron.uhabits.core.models.Entry.Companion.YES_MANUAL
-import org.isoron.uhabits.core.preferences.Preferences
-import org.isoron.uhabits.databinding.CheckmarkPopupBinding
-import org.isoron.uhabits.utils.InterfaceUtils.getFontAwesome
-import org.isoron.uhabits.utils.dimBehind
-import org.isoron.uhabits.utils.dp
-import org.isoron.uhabits.utils.sres
-
-const val POPUP_WIDTH = 4 * 48f + 16f
-const val POPUP_HEIGHT = 48f * 2.5f + 8f
-
-class CheckmarkPopup(
-    private val context: Context,
-    private val color: Int,
-    private var notes: String,
-    private var value: Int,
-    private val prefs: Preferences,
-    private val anchor: View,
-) {
-    var onToggle: (Int, String) -> Unit = { _, _ -> }
-    private lateinit var dialog: Dialog
-
-    private val view = CheckmarkPopupBinding.inflate(LayoutInflater.from(context)).apply {
-        // Required for round corners
-        container.clipToOutline = true
-    }
-
-    init {
-        view.booleanButtons.visibility = VISIBLE
-        initColors()
-        initTypefaces()
-        hideDisabledButtons()
-        populate()
-    }
-
-    private fun initColors() {
-        arrayOf(view.yesBtn, view.skipBtn).forEach {
-            it.setTextColor(color)
-        }
-        arrayOf(view.noBtn, view.unknownBtn).forEach {
-            it.setTextColor(view.root.sres.getColor(R.attr.contrast60))
-        }
-    }
-
-    private fun initTypefaces() {
-        arrayOf(view.yesBtn, view.noBtn, view.skipBtn, view.unknownBtn).forEach {
-            it.typeface = getFontAwesome(context)
-        }
-    }
-
-    private fun hideDisabledButtons() {
-        if (!prefs.isSkipEnabled) view.skipBtn.visibility = GONE
-        if (!prefs.areQuestionMarksEnabled) view.unknownBtn.visibility = GONE
-    }
-
-    private fun populate() {
-        val selectedBtn = when (value) {
-            YES_MANUAL -> view.yesBtn
-            YES_AUTO -> view.noBtn
-            NO -> view.noBtn
-            UNKNOWN -> if (prefs.areQuestionMarksEnabled) view.unknownBtn else view.noBtn
-            SKIP -> if (prefs.isSkipEnabled) view.skipBtn else view.noBtn
-            else -> null
-        }
-        view.notes.setText(notes)
-    }
-
-    fun show() {
-        dialog = Dialog(context, android.R.style.Theme_NoTitleBar)
-        dialog.setContentView(view.root)
-        dialog.window?.apply {
-            setLayout(
-                view.root.dp(POPUP_WIDTH).toInt(),
-                view.root.dp(POPUP_HEIGHT).toInt()
-            )
-            setBackgroundDrawableResource(android.R.color.transparent)
-        }
-        fun onClick(v: Int) {
-            this.value = v
-            save()
-        }
-        view.yesBtn.setOnClickListener { onClick(YES_MANUAL) }
-        view.noBtn.setOnClickListener { onClick(NO) }
-        view.skipBtn.setOnClickListener { onClick(SKIP) }
-        view.unknownBtn.setOnClickListener { onClick(UNKNOWN) }
-        dialog.setCanceledOnTouchOutside(true)
-        dialog.dimBehind()
-        dialog.show()
-    }
-
-    fun save() {
-        onToggle(value, view.notes.text.toString().trim())
-        dialog.dismiss()
-    }
-}

uhabits-android/src/main/java/org/isoron/uhabits/activities/common/dialogs/ConfirmSyncKeyDialog.kt

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2016-2021 Álinson Santos Xavier <git@axavier.org>
+ *
+ * This file is part of Loop Habit Tracker.
+ *
+ * Loop Habit Tracker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * Loop Habit Tracker is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.isoron.uhabits.activities.common.dialogs
+
+import android.content.Context
+import android.content.DialogInterface
+import androidx.appcompat.app.AlertDialog
+import org.isoron.uhabits.R
+import org.isoron.uhabits.core.ui.callbacks.OnConfirmedCallback
+import org.isoron.uhabits.inject.ActivityContext
+
+class ConfirmSyncKeyDialog(
+    @ActivityContext context: Context,
+    callback: OnConfirmedCallback
+) : AlertDialog(context) {
+    init {
+        setTitle(R.string.device_sync)
+        val res = context.resources
+        setMessage(res.getString(R.string.sync_confirm))
+        setButton(
+            BUTTON_POSITIVE,
+            res.getString(R.string.yes)
+        ) { dialog: DialogInterface?, which: Int -> callback.onConfirmed() }
+        setButton(
+            BUTTON_NEGATIVE,
+            res.getString(R.string.no)
+        ) { dialog: DialogInterface?, which: Int -> }
+    }
+}

uhabits-android/src/main/java/org/isoron/uhabits/activities/common/dialogs/FrequencyPickerDialog.kt

@@ -21,6 +21,7 @@ package org.isoron.uhabits.activities.common.dialogs
 
 import android.app.Dialog
 import android.os.Bundle
+import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.widget.EditText
@@ -43,7 +44,7 @@ class FrequencyPickerDialog(
     constructor() : this(1, 1)
 
     override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
-        val inflater = LayoutInflater.from(requireActivity())
+        val inflater = LayoutInflater.from(activity!!)
         contentView = inflater.inflate(R.layout.frequency_picker_dialog, null)
 
         addBeforeAfterText(
@@ -61,19 +62,15 @@ class FrequencyPickerDialog(
             contentView.xTimesPerMonthContainer,
         )
 
-        addBeforeAfterText(
-            this.getString(R.string.x_times_per_y_days),
-            contentView.xTimesPerYDaysContainer,
-        )
-
         contentView.everyDayRadioButton.setOnClickListener {
             check(contentView.everyDayRadioButton)
+            unfocusAll()
         }
 
         contentView.everyXDaysRadioButton.setOnClickListener {
             check(contentView.everyXDaysRadioButton)
             val everyXDaysTextView = contentView.everyXDaysTextView
-            selectInputField(everyXDaysTextView)
+            focus(everyXDaysTextView)
         }
 
         contentView.everyXDaysTextView.setOnFocusChangeListener { v, hasFocus ->
@@ -82,7 +79,7 @@ class FrequencyPickerDialog(
 
         contentView.xTimesPerWeekRadioButton.setOnClickListener {
             check(contentView.xTimesPerWeekRadioButton)
-            selectInputField(contentView.xTimesPerWeekTextView)
+            focus(contentView.xTimesPerWeekTextView)
         }
 
         contentView.xTimesPerWeekTextView.setOnFocusChangeListener { v, hasFocus ->
@@ -91,27 +88,14 @@ class FrequencyPickerDialog(
 
         contentView.xTimesPerMonthRadioButton.setOnClickListener {
             check(contentView.xTimesPerMonthRadioButton)
-            selectInputField(contentView.xTimesPerMonthTextView)
+            focus(contentView.xTimesPerMonthTextView)
         }
 
         contentView.xTimesPerMonthTextView.setOnFocusChangeListener { v, hasFocus ->
             if (hasFocus) check(contentView.xTimesPerMonthRadioButton)
         }
 
-        contentView.xTimesPerYDaysRadioButton.setOnClickListener {
-            check(contentView.xTimesPerYDaysRadioButton)
-            selectInputField(contentView.xTimesPerYDaysXTextView)
-        }
-
-        contentView.xTimesPerYDaysXTextView.setOnFocusChangeListener { v, hasFocus ->
-            if (hasFocus) check(contentView.xTimesPerYDaysRadioButton)
-        }
-
-        contentView.xTimesPerYDaysYTextView.setOnFocusChangeListener { v, hasFocus ->
-            if (hasFocus) check(contentView.xTimesPerYDaysRadioButton)
-        }
-
-        return AlertDialog.Builder(requireActivity())
+        return AlertDialog.Builder(activity!!)
             .setView(contentView)
             .setPositiveButton(R.string.save) { _, _ -> onSaveClicked() }
             .create()
@@ -122,11 +106,12 @@ class FrequencyPickerDialog(
         container: LinearLayout
     ) {
         val parts = str.split("%d")
-        for (i in parts.indices) {
         container.addView(
-                TextView(activity).apply { text = parts[i].trim() }, 2 * i + 1,
+            TextView(activity).apply { text = parts[0].trim() }, 1,
+        )
+        container.addView(
+            TextView(activity).apply { text = parts[1].trim() }, 3,
         )
-        }
     }
 
     private fun onSaveClicked() {
@@ -147,12 +132,6 @@ class FrequencyPickerDialog(
                     denominator = 7
                 }
             }
-            contentView.xTimesPerYDaysRadioButton.isChecked -> {
-                if (contentView.xTimesPerYDaysXTextView.text.isNotEmpty() && contentView.xTimesPerYDaysYTextView.text.isNotEmpty()) {
-                    numerator = Integer.parseInt(contentView.xTimesPerYDaysXTextView.text.toString())
-                    denominator = Integer.parseInt(contentView.xTimesPerYDaysYTextView.text.toString())
-                }
-            }
             else -> {
                 if (contentView.xTimesPerMonthTextView.text.isNotEmpty()) {
                     numerator = Integer.parseInt(contentView.xTimesPerMonthTextView.text.toString())
@@ -168,10 +147,10 @@ class FrequencyPickerDialog(
         dismiss()
     }
 
-    private fun check(view: RadioButton) {
+    private fun check(view: RadioButton?) {
         uncheckAll()
-        view.isChecked = true
-        view.requestFocus()
+        view?.isChecked = true
+        view?.requestFocus()
     }
 
     override fun onResume() {
@@ -184,7 +163,7 @@ class FrequencyPickerDialog(
         if (freqDenominator == 30 || freqDenominator == 31) {
             contentView.xTimesPerMonthRadioButton.isChecked = true
             contentView.xTimesPerMonthTextView.setText(freqNumerator.toString())
-            selectInputField(contentView.xTimesPerMonthTextView)
+            focus(contentView.xTimesPerMonthTextView)
         } else {
             if (freqNumerator == 1) {
                 if (freqDenominator == 1) {
@@ -192,23 +171,23 @@ class FrequencyPickerDialog(
                 } else {
                     contentView.everyXDaysRadioButton.isChecked = true
                     contentView.everyXDaysTextView.setText(freqDenominator.toString())
-                    selectInputField(contentView.everyXDaysTextView)
+                    focus(contentView.everyXDaysTextView)
                 }
             } else {
                 if (freqDenominator == 7) {
                     contentView.xTimesPerWeekRadioButton.isChecked = true
                     contentView.xTimesPerWeekTextView.setText(freqNumerator.toString())
-                    selectInputField(contentView.xTimesPerWeekTextView)
+                    focus(contentView.xTimesPerWeekTextView)
                 } else {
-                    contentView.xTimesPerYDaysRadioButton.isChecked = true
-                    contentView.xTimesPerYDaysXTextView.setText(freqNumerator.toString())
-                    contentView.xTimesPerYDaysYTextView.setText(freqDenominator.toString())
+                    Log.w("FrequencyPickerDialog", "Unknown frequency: $freqNumerator/$freqDenominator")
+                    contentView.everyDayRadioButton.isChecked = true
                 }
             }
         }
     }
 
-    private fun selectInputField(view: EditText) {
+    private fun focus(view: EditText) {
+        view.requestFocus()
         view.setSelection(view.text.length)
     }
 
@@ -217,6 +196,11 @@ class FrequencyPickerDialog(
         contentView.everyXDaysRadioButton.isChecked = false
         contentView.xTimesPerWeekRadioButton.isChecked = false
         contentView.xTimesPerMonthRadioButton.isChecked = false
-        contentView.xTimesPerYDaysRadioButton.isChecked = false
+    }
+
+    private fun unfocusAll() {
+        contentView.everyXDaysTextView.clearFocus()
+        contentView.xTimesPerWeekTextView.clearFocus()
+        contentView.xTimesPerMonthTextView.clearFocus()
     }
 }

uhabits-android/src/main/java/org/isoron/uhabits/activities/common/dialogs/HistoryEditorDialog.kt

@@ -43,7 +43,7 @@ class HistoryEditorDialog : AppCompatDialogFragment(), CommandRunner.Listener {
     private lateinit var commandRunner: CommandRunner
     private lateinit var habit: Habit
     private lateinit var preferences: Preferences
-    lateinit var dataView: AndroidDataView
+    private lateinit var dataView: AndroidDataView
 
     private var chart: HistoryChart? = null
     private var onDateClickedListener: OnDateClickedListener? = null
@@ -62,11 +62,9 @@ class HistoryEditorDialog : AppCompatDialogFragment(), CommandRunner.Listener {
             firstWeekday = preferences.firstWeekday,
             paletteColor = habit.color,
             series = emptyList(),
-            defaultSquare = HistoryChart.Square.OFF,
-            notesIndicators = emptyList(),
             theme = themeSwitcher.currentTheme,
             today = DateUtils.getTodayWithOffset().toLocalDate(),
-            onDateClickedListener = onDateClickedListener ?: object : OnDateClickedListener {},
+            onDateClickedListener = onDateClickedListener ?: OnDateClickedListener { },
             padding = 10.0,
         )
         dataView = AndroidDataView(context!!, null)
@@ -103,8 +101,6 @@ class HistoryEditorDialog : AppCompatDialogFragment(), CommandRunner.Listener {
             theme = LightTheme()
         )
         chart?.series = model.series
-        chart?.defaultSquare = model.defaultSquare
-        chart?.notesIndicators = model.notesIndicators
         dataView.postInvalidate()
     }
 

uhabits-android/src/main/java/org/isoron/uhabits/activities/common/dialogs/NumberPickerFactory.kt

@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2016-2021 Álinson Santos Xavier <git@axavier.org>
+ *
+ * This file is part of Loop Habit Tracker.
+ *
+ * Loop Habit Tracker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * Loop Habit Tracker is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.isoron.uhabits.activities.common.dialogs
+
+import android.content.Context
+import android.content.DialogInterface
+import android.text.InputFilter
+import android.view.LayoutInflater
+import android.view.WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE
+import android.view.inputmethod.EditorInfo
+import android.widget.EditText
+import android.widget.NumberPicker
+import android.widget.TextView
+import androidx.appcompat.app.AlertDialog
+import org.isoron.uhabits.R
+import org.isoron.uhabits.core.ui.screens.habits.list.ListHabitsBehavior
+import org.isoron.uhabits.inject.ActivityContext
+import org.isoron.uhabits.utils.InterfaceUtils
+import javax.inject.Inject
+import kotlin.math.roundToLong
+
+class NumberPickerFactory
+@Inject constructor(
+    @ActivityContext private val context: Context
+) {
+    fun create(
+        value: Double,
+        unit: String,
+        callback: ListHabitsBehavior.NumberPickerCallback
+    ): AlertDialog {
+
+        val inflater = LayoutInflater.from(context)
+        val view = inflater.inflate(R.layout.number_picker_dialog, null)
+
+        val picker = view.findViewById<NumberPicker>(R.id.picker)
+        val picker2 = view.findViewById<NumberPicker>(R.id.picker2)
+        val tvUnit = view.findViewById<TextView>(R.id.tvUnit)
+
+        val intValue = (value * 100).roundToLong().toInt()
+
+        picker.minValue = 0
+        picker.maxValue = Integer.MAX_VALUE / 100
+        picker.value = intValue / 100
+        picker.wrapSelectorWheel = false
+
+        picker2.minValue = 0
+        picker2.maxValue = 19
+        picker2.setFormatter { v -> String.format("%02d", 5 * v) }
+        picker2.value = intValue % 100 / 5
+        refreshInitialValue(picker2)
+
+        tvUnit.text = unit
+
+        val dialog = AlertDialog.Builder(context)
+            .setView(view)
+            .setTitle(R.string.change_value)
+            .setPositiveButton(android.R.string.ok) { _, _ ->
+                picker.clearFocus()
+                val v = picker.value + 0.05 * picker2.value
+                callback.onNumberPicked(v)
+            }
+            .setOnDismissListener {
+                callback.onNumberPickerDismissed()
+            }
+            .create()
+
+        dialog.setOnShowListener {
+            picker.getChildAt(0)?.requestFocus()
+            dialog.window?.setSoftInputMode(SOFT_INPUT_STATE_ALWAYS_VISIBLE)
+        }
+
+        InterfaceUtils.setupEditorAction(
+            picker
+        ) { _, actionId, _ ->
+            if (actionId == EditorInfo.IME_ACTION_DONE)
+                dialog.getButton(DialogInterface.BUTTON_POSITIVE).performClick()
+            false
+        }
+
+        return dialog
+    }
+
+    private fun refreshInitialValue(picker: NumberPicker) {
+        // Workaround for Android bug:
+        // https://code.google.com/p/android/issues/detail?id=35482
+        val f = NumberPicker::class.java.getDeclaredField("mInputText")
+        f.isAccessible = true
+        val inputText = f.get(picker) as EditText
+        inputText.filters = arrayOfNulls<InputFilter>(0)
+    }
+}

uhabits-android/src/main/java/org/isoron/uhabits/activities/common/dialogs/NumberPopup.kt

@@ -1,111 +0,0 @@
-/*
- * Copyright (C) 2016-2021 Álinson Santos Xavier <git@axavier.org>
- *
- * This file is part of Loop Habit Tracker.
- *
- * Loop Habit Tracker is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by the
- * Free Software Foundation, either version 3 of the License, or (at your
- * option) any later version.
- *
- * Loop Habit Tracker is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-package org.isoron.uhabits.activities.common.dialogs
-
-import android.app.Dialog
-import android.content.Context
-import android.view.KeyEvent.KEYCODE_ENTER
-import android.view.LayoutInflater
-import android.view.MotionEvent.ACTION_DOWN
-import android.view.View
-import android.view.View.GONE
-import android.view.View.VISIBLE
-import org.isoron.uhabits.core.models.Entry
-import org.isoron.uhabits.core.preferences.Preferences
-import org.isoron.uhabits.databinding.CheckmarkPopupBinding
-import org.isoron.uhabits.utils.dimBehind
-import org.isoron.uhabits.utils.dp
-import org.isoron.uhabits.utils.requestFocusWithKeyboard
-import java.text.DecimalFormat
-
-class NumberPopup(
-    private val context: Context,
-    private var notes: String,
-    private var value: Double,
-    private val prefs: Preferences,
-    private val anchor: View,
-) {
-    var onToggle: (Double, String) -> Unit = { _, _ -> }
-    private val originalValue = value
-    private lateinit var dialog: Dialog
-
-    private val view = CheckmarkPopupBinding.inflate(LayoutInflater.from(context)).apply {
-        // Required for round corners
-        container.clipToOutline = true
-    }
-
-    init {
-        view.numberButtons.visibility = VISIBLE
-        hideDisabledButtons()
-        populate()
-    }
-
-    private fun hideDisabledButtons() {
-        if (!prefs.isSkipEnabled) view.skipBtnNumber.visibility = GONE
-    }
-
-    private fun populate() {
-        view.notes.setText(notes)
-        view.value.setText(
-            when {
-                value < 0.01 -> "0"
-                else -> DecimalFormat("#.##").format(value)
-            }
-        )
-    }
-
-    fun show() {
-        dialog = Dialog(context, android.R.style.Theme_NoTitleBar)
-        dialog.setContentView(view.root)
-        dialog.window?.apply {
-            setLayout(
-                view.root.dp(POPUP_WIDTH).toInt(),
-                view.root.dp(POPUP_HEIGHT).toInt()
-            )
-            setBackgroundDrawableResource(android.R.color.transparent)
-        }
-
-        view.value.setOnKeyListener { _, keyCode, event ->
-            if (event.action == ACTION_DOWN && keyCode == KEYCODE_ENTER) {
-                save()
-                return@setOnKeyListener true
-            }
-            return@setOnKeyListener false
-        }
-        view.saveBtn.setOnClickListener {
-            save()
-        }
-        view.skipBtnNumber.setOnClickListener {
-            view.value.setText((Entry.SKIP.toDouble() / 1000).toString())
-            save()
-        }
-        view.value.requestFocusWithKeyboard()
-        dialog.setCanceledOnTouchOutside(true)
-        dialog.dimBehind()
-        dialog.show()
-    }
-
-    fun save() {
-        val value = view.value.text.toString().toDoubleOrNull() ?: originalValue
-        val notes = view.notes.text.toString()
-        onToggle(value, notes)
-        dialog.dismiss()
-    }
-}

uhabits-android/src/main/java/org/isoron/uhabits/activities/common/views/FrequencyChart.kt

@@ -29,7 +29,6 @@ import org.isoron.uhabits.core.utils.DateUtils.Companion.getShortWeekdayNames
 import org.isoron.uhabits.core.utils.DateUtils.Companion.getStartOfTodayCalendar
 import org.isoron.uhabits.core.utils.DateUtils.Companion.getStartOfTodayCalendarWithOffset
 import org.isoron.uhabits.core.utils.DateUtils.Companion.getWeekdaySequence
-import org.isoron.uhabits.core.utils.DateUtils.Companion.getWeekdaysInMonth
 import org.isoron.uhabits.utils.ColorUtils.mixColors
 import org.isoron.uhabits.utils.StyledResources
 import org.isoron.uhabits.utils.toSimpleDataFormat
@@ -63,6 +62,7 @@ class FrequencyChart : ScrollableChart {
     private var primaryColor = 0
     private var isBackgroundTransparent = false
     private lateinit var frequency: HashMap<Timestamp, Array<Int>>
+    private var maxFreq = 0
     private var firstWeekday = Calendar.SUNDAY
 
     constructor(context: Context?) : super(context) {
@@ -82,6 +82,7 @@ class FrequencyChart : ScrollableChart {
 
     fun setFrequency(frequency: java.util.HashMap<Timestamp, Array<Int>>) {
         this.frequency = frequency
+        maxFreq = getMaxFreq(frequency)
         postInvalidate()
     }
 
@@ -90,6 +91,15 @@ class FrequencyChart : ScrollableChart {
         postInvalidate()
     }
 
+    private fun getMaxFreq(frequency: HashMap<Timestamp, Array<Int>>): Int {
+        var maxValue = 1
+        for (values in frequency.values) for (value in values) maxValue = max(
+            value,
+            maxValue
+        )
+        return maxValue
+    }
+
     fun setIsBackgroundTransparent(isBackgroundTransparent: Boolean) {
         this.isBackgroundTransparent = isBackgroundTransparent
         initColors()
@@ -156,7 +166,6 @@ class FrequencyChart : ScrollableChart {
 
     private fun drawColumn(canvas: Canvas, rect: RectF?, date: GregorianCalendar) {
         val values = frequency[Timestamp(date)]
-        val weekDaysInMonth = getWeekdaysInMonth(Timestamp(date))
         val rowHeight = rect!!.height() / 8.0f
         prevRect!!.set(rect)
         val localeWeekdayList: Array<Int> = getWeekdaySequence(firstWeekday)
@@ -164,8 +173,7 @@ class FrequencyChart : ScrollableChart {
             rect[0f, 0f, baseSize.toFloat()] = baseSize.toFloat()
             rect.offset(prevRect!!.left, prevRect!!.top + baseSize * j)
             val i = localeWeekdayList[j] % 7
-            if (values != null)
-                drawMarker(canvas, rect, values[i], weekDaysInMonth[i])
+            if (values != null) drawMarker(canvas, rect, values[i])
             rect.offset(0f, rowHeight)
         }
         drawFooter(canvas, rect, date)
@@ -213,16 +221,12 @@ class FrequencyChart : ScrollableChart {
         canvas.drawLine(rGrid.left, rGrid.top, rGrid.right, rGrid.top, pGrid!!)
     }
 
-    private fun drawMarker(canvas: Canvas, rect: RectF?, value: Int?, frequency: Int) {
-        // value can be negative when the entry is skipped
-        val valueCopy = value?.let { max(0, it) }
-
+    private fun drawMarker(canvas: Canvas, rect: RectF?, value: Int?) {
         val padding = rect!!.height() * 0.2f
         // maximal allowed mark radius
         val maxRadius = (rect.height() - 2 * padding) / 2.0f
         // the real mark radius is scaled down by a factor depending on the maximal frequency
-
-        val scale = 1.0f / frequency * valueCopy!!
+        val scale = 1.0f / maxFreq * value!!
         val radius = maxRadius * scale
         val colorIndex = min((colors.size - 1), ((colors.size - 1) * scale).roundToInt())
         pGraph!!.color = colors[colorIndex]
@@ -285,5 +289,6 @@ class FrequencyChart : ScrollableChart {
             frequency[Timestamp(date)] = values
             date.add(Calendar.MONTH, -1)
         }
+        maxFreq = getMaxFreq(frequency)
     }
 }

uhabits-android/src/main/java/org/isoron/uhabits/activities/habits/edit/EditHabitActivity.kt

@@ -69,7 +69,7 @@ fun formatFrequency(freqNum: Int, freqDen: Int, resources: Resources) = when {
     freqNum == 1 && freqDen == 7 -> resources.getString(R.string.every_week)
     freqNum == 1 && freqDen > 1 -> resources.getString(R.string.every_x_days, freqDen)
     freqDen == 7 -> resources.getString(R.string.x_times_per_week, freqNum)
-    else -> resources.getString(R.string.x_times_per_y_days, freqNum, freqDen)
+    else -> "$freqNum/$freqDen"
 }
 
 class EditHabitActivity : AppCompatActivity() {
@@ -88,7 +88,6 @@ class EditHabitActivity : AppCompatActivity() {
     var reminderHour = -1
     var reminderMin = -1
     var reminderDays: WeekdayList = WeekdayList.EVERY_DAY
-    var targetType = NumericalHabitType.AT_LEAST
 
     override fun onCreate(state: Bundle?) {
         super.onCreate(state)
@@ -108,7 +107,6 @@ class EditHabitActivity : AppCompatActivity() {
             color = habit.color
             freqNum = habit.frequency.numerator
             freqDen = habit.frequency.denominator
-            targetType = habit.targetType
             habit.reminder?.let {
                 reminderHour = it.hour
                 reminderMin = it.minute
@@ -140,7 +138,6 @@ class EditHabitActivity : AppCompatActivity() {
             HabitType.YES_NO -> {
                 binding.unitOuterBox.visibility = View.GONE
                 binding.targetOuterBox.visibility = View.GONE
-                binding.targetTypeOuterBox.visibility = View.GONE
             }
             HabitType.NUMERICAL -> {
                 binding.nameInput.hint = getString(R.string.measurable_short_example)
@@ -175,23 +172,6 @@ class EditHabitActivity : AppCompatActivity() {
             dialog.show(supportFragmentManager, "frequencyPicker")
         }
 
-        populateTargetType()
-        binding.targetTypePicker.setOnClickListener {
-            val builder = AlertDialog.Builder(this)
-            val arrayAdapter = ArrayAdapter<String>(this, android.R.layout.select_dialog_item)
-            arrayAdapter.add(getString(R.string.target_type_at_least))
-            arrayAdapter.add(getString(R.string.target_type_at_most))
-            builder.setAdapter(arrayAdapter) { dialog, which ->
-                targetType = when (which) {
-                    0 -> NumericalHabitType.AT_LEAST
-                    else -> NumericalHabitType.AT_MOST
-                }
-                populateTargetType()
-                dialog.dismiss()
-            }
-            builder.show()
-        }
-
         binding.numericalFrequencyPicker.setOnClickListener {
             val builder = AlertDialog.Builder(this)
             val arrayAdapter = ArrayAdapter<String>(this, android.R.layout.select_dialog_item)
@@ -282,7 +262,7 @@ class EditHabitActivity : AppCompatActivity() {
         habit.frequency = Frequency(freqNum, freqDen)
         if (habitType == HabitType.NUMERICAL) {
             habit.targetValue = targetInput.text.toString().toDouble()
-            habit.targetType = targetType
+            habit.targetType = NumericalHabitType.AT_LEAST
             habit.unit = unitInput.text.trim().toString()
         }
         habit.type = habitType
@@ -344,13 +324,6 @@ class EditHabitActivity : AppCompatActivity() {
         }
     }
 
-    private fun populateTargetType() {
-        binding.targetTypePicker.text = when (targetType) {
-            NumericalHabitType.AT_MOST -> getString(R.string.target_type_at_most)
-            else -> getString(R.string.target_type_at_least)
-        }
-    }
-
     private fun updateColors() {
         androidColor = themeSwitcher.currentTheme.color(color).toInt()
         binding.colorButton.backgroundTintList = ColorStateList.valueOf(androidColor)

uhabits-android/src/main/java/org/isoron/uhabits/activities/habits/list/ListHabitsActivity.kt

@@ -26,10 +26,12 @@ import android.view.MenuItem
 import androidx.appcompat.app.AppCompatActivity
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
 import org.isoron.uhabits.BaseExceptionHandler
 import org.isoron.uhabits.HabitsApplication
 import org.isoron.uhabits.activities.habits.list.views.HabitCardListAdapter
 import org.isoron.uhabits.core.preferences.Preferences
+import org.isoron.uhabits.core.sync.SyncManager
 import org.isoron.uhabits.core.tasks.TaskRunner
 import org.isoron.uhabits.core.ui.ThemeSwitcher.Companion.THEME_DARK
 import org.isoron.uhabits.core.utils.MidnightTimer
@@ -47,13 +49,13 @@ class ListHabitsActivity : AppCompatActivity(), Preferences.Listener {
     lateinit var screen: ListHabitsScreen
     lateinit var prefs: Preferences
     lateinit var midnightTimer: MidnightTimer
+    lateinit var syncManager: SyncManager
     private val scope = CoroutineScope(Dispatchers.Main)
 
     private lateinit var menu: ListHabitsMenu
 
     override fun onQuestionMarksChanged() {
         invalidateOptionsMenu()
-        menu.behavior.onPreferencesChanged()
     }
 
     override fun onCreate(savedInstanceState: Bundle?) {
@@ -69,6 +71,7 @@ class ListHabitsActivity : AppCompatActivity(), Preferences.Listener {
 
         prefs = appComponent.preferences
         prefs.addListener(this)
+        syncManager = appComponent.syncManager
         pureBlack = prefs.isPureBlackEnabled
         midnightTimer = appComponent.midnightTimer
         rootView = component.listHabitsRootView
@@ -83,8 +86,11 @@ class ListHabitsActivity : AppCompatActivity(), Preferences.Listener {
 
     override fun onPause() {
         midnightTimer.onPause()
-        screen.onDetached()
+        screen.onDettached()
         adapter.cancelRefresh()
+        scope.launch {
+            syncManager.onPause()
+        }
         super.onPause()
     }
 
@@ -93,6 +99,9 @@ class ListHabitsActivity : AppCompatActivity(), Preferences.Listener {
         screen.onAttached()
         rootView.postInvalidate()
         midnightTimer.onResume()
+        scope.launch {
+            syncManager.onResume()
+        }
         taskRunner.run {
             AutoBackup(this@ListHabitsActivity).run()
         }

uhabits-android/src/main/java/org/isoron/uhabits/activities/habits/list/ListHabitsMenu.kt

@@ -39,7 +39,7 @@ class ListHabitsMenu @Inject constructor(
     @ActivityContext context: Context,
     private val preferences: Preferences,
     private val themeSwitcher: ThemeSwitcher,
-    val behavior: ListHabitsMenuBehavior
+    private val behavior: ListHabitsMenuBehavior
 ) {
     val activity = (context as AppCompatActivity)
 

uhabits-android/src/main/java/org/isoron/uhabits/activities/habits/list/ListHabitsScreen.kt

@@ -22,14 +22,14 @@ package org.isoron.uhabits.activities.habits.list
 import android.app.Activity
 import android.content.Context
 import android.content.Intent
+import android.util.Log
 import androidx.appcompat.app.AppCompatActivity
 import dagger.Lazy
-import org.isoron.platform.gui.toInt
 import org.isoron.uhabits.R
-import org.isoron.uhabits.activities.common.dialogs.CheckmarkPopup
 import org.isoron.uhabits.activities.common.dialogs.ColorPickerDialogFactory
 import org.isoron.uhabits.activities.common.dialogs.ConfirmDeleteDialog
-import org.isoron.uhabits.activities.common.dialogs.NumberPopup
+import org.isoron.uhabits.activities.common.dialogs.ConfirmSyncKeyDialog
+import org.isoron.uhabits.activities.common.dialogs.NumberPickerFactory
 import org.isoron.uhabits.activities.habits.edit.HabitTypeDialog
 import org.isoron.uhabits.activities.habits.list.views.HabitCardListAdapter
 import org.isoron.uhabits.core.commands.ArchiveHabitsCommand
@@ -42,7 +42,6 @@ import org.isoron.uhabits.core.commands.EditHabitCommand
 import org.isoron.uhabits.core.commands.UnarchiveHabitsCommand
 import org.isoron.uhabits.core.models.Habit
 import org.isoron.uhabits.core.models.PaletteColor
-import org.isoron.uhabits.core.preferences.Preferences
 import org.isoron.uhabits.core.tasks.TaskRunner
 import org.isoron.uhabits.core.ui.ThemeSwitcher
 import org.isoron.uhabits.core.ui.callbacks.OnColorPickedCallback
@@ -54,6 +53,8 @@ import org.isoron.uhabits.core.ui.screens.habits.list.ListHabitsBehavior.Message
 import org.isoron.uhabits.core.ui.screens.habits.list.ListHabitsBehavior.Message.FILE_NOT_RECOGNIZED
 import org.isoron.uhabits.core.ui.screens.habits.list.ListHabitsBehavior.Message.IMPORT_FAILED
 import org.isoron.uhabits.core.ui.screens.habits.list.ListHabitsBehavior.Message.IMPORT_SUCCESSFUL
+import org.isoron.uhabits.core.ui.screens.habits.list.ListHabitsBehavior.Message.SYNC_ENABLED
+import org.isoron.uhabits.core.ui.screens.habits.list.ListHabitsBehavior.Message.SYNC_KEY_ALREADY_INSTALLED
 import org.isoron.uhabits.core.ui.screens.habits.list.ListHabitsMenuBehavior
 import org.isoron.uhabits.core.ui.screens.habits.list.ListHabitsSelectionMenuBehavior
 import org.isoron.uhabits.inject.ActivityContext
@@ -63,7 +64,6 @@ import org.isoron.uhabits.tasks.ExportDBTaskFactory
 import org.isoron.uhabits.tasks.ImportDataTask
 import org.isoron.uhabits.tasks.ImportDataTaskFactory
 import org.isoron.uhabits.utils.copyTo
-import org.isoron.uhabits.utils.currentTheme
 import org.isoron.uhabits.utils.restartWithFade
 import org.isoron.uhabits.utils.showMessage
 import org.isoron.uhabits.utils.showSendEmailScreen
@@ -92,9 +92,8 @@ class ListHabitsScreen
     private val exportDBFactory: ExportDBTaskFactory,
     private val importTaskFactory: ImportDataTaskFactory,
     private val colorPickerFactory: ColorPickerDialogFactory,
-    private val behavior: Lazy<ListHabitsBehavior>,
-    private val preferences: Preferences,
-    private val rootView: Lazy<ListHabitsRootView>,
+    private val numberPickerFactory: NumberPickerFactory,
+    private val behavior: Lazy<ListHabitsBehavior>
 ) : CommandRunner.Listener,
     ListHabitsBehavior.Screen,
     ListHabitsMenuBehavior.Screen,
@@ -104,9 +103,17 @@ class ListHabitsScreen
 
     fun onAttached() {
         commandRunner.addListener(this)
+        if (activity.intent.action == "android.intent.action.VIEW") {
+            val uri = activity.intent.data!!.toString()
+            val parts = uri.replace(Regex("^.*sync/"), "").split("#")
+            val syncKey = parts[0]
+            val encKey = parts[1]
+            Log.i("ListHabitsScreen", "sync: $syncKey enc: $encKey")
+            behavior.get().onSyncKeyOffer(syncKey, encKey)
+        }
     }
 
-    fun onDetached() {
+    fun onDettached() {
         commandRunner.removeListener(this)
     }
 
@@ -201,6 +208,8 @@ class ListHabitsScreen
                     DATABASE_REPAIRED -> R.string.database_repaired
                     COULD_NOT_GENERATE_BUG_REPORT -> R.string.bug_report_failed
                     FILE_NOT_RECOGNIZED -> R.string.file_not_recognized
+                    SYNC_ENABLED -> R.string.sync_enabled
+                    SYNC_KEY_ALREADY_INSTALLED -> R.string.sync_key_already_installed
                 }
             )
         )
@@ -227,42 +236,16 @@ class ListHabitsScreen
         picker.show(activity.supportFragmentManager, "picker")
     }
 
-    override fun showNumberPopup(
+    override fun showNumberPicker(
         value: Double,
-        notes: String,
+        unit: String,
         callback: ListHabitsBehavior.NumberPickerCallback
     ) {
-        val view = rootView.get()
-        NumberPopup(
-            context = context,
-            prefs = preferences,
-            anchor = view,
-            notes = notes,
-            value = value,
-        ).apply {
-            onToggle = { value, notes -> callback.onNumberPicked(value, notes) }
-            show()
-        }
+        numberPickerFactory.create(value, unit, callback).show()
     }
 
-    override fun showCheckmarkPopup(
-        selectedValue: Int,
-        notes: String,
-        color: PaletteColor,
-        callback: ListHabitsBehavior.CheckMarkDialogCallback
-    ) {
-        val view = rootView.get()
-        CheckmarkPopup(
-            context = context,
-            prefs = preferences,
-            anchor = view,
-            color = view.currentTheme().color(color).toInt(),
-            notes = notes,
-            value = selectedValue,
-        ).apply {
-            onToggle = { value, notes -> callback.onNotesSaved(value, notes) }
-            show()
-        }
+    override fun showConfirmInstallSyncKey(callback: OnConfirmedCallback) {
+        ConfirmSyncKeyDialog(activity, callback).show()
     }
 
     private fun getExecuteString(command: Command): String? {

uhabits-android/src/main/java/org/isoron/uhabits/activities/habits/list/views/CheckmarkButtonView.kt

@@ -37,15 +37,13 @@ import org.isoron.uhabits.core.models.Entry.Companion.YES_AUTO
 import org.isoron.uhabits.core.models.Entry.Companion.YES_MANUAL
 import org.isoron.uhabits.core.preferences.Preferences
 import org.isoron.uhabits.inject.ActivityContext
-import org.isoron.uhabits.utils.drawNotesIndicator
+import org.isoron.uhabits.utils.dim
 import org.isoron.uhabits.utils.getFontAwesome
-import org.isoron.uhabits.utils.sp
+import org.isoron.uhabits.utils.showMessage
 import org.isoron.uhabits.utils.sres
 import org.isoron.uhabits.utils.toMeasureSpec
 import javax.inject.Inject
 
-const val TOGGLE_DELAY_MILLIS = 2000L
-
 class CheckmarkButtonViewFactory
 @Inject constructor(
     @ActivityContext val context: Context,
@@ -73,42 +71,33 @@ class CheckmarkButtonView(
             invalidate()
         }
 
-    var notes = ""
-        set(value) {
-            field = value
-            invalidate()
-        }
-
-    var onToggle: (Int, String, Long) -> Unit = { _, _, _ -> }
-
-    var onEdit: () -> Unit = { }
-
+    var onToggle: (Int) -> Unit = {}
     private var drawer = Drawer()
 
     init {
+        isFocusable = false
         setOnClickListener(this)
         setOnLongClickListener(this)
     }
 
-    fun performToggle(delay: Long) {
-        value = Entry.nextToggleValue(
-            value = value,
-            isSkipEnabled = preferences.isSkipEnabled,
-            areQuestionMarksEnabled = preferences.areQuestionMarksEnabled
-        )
-        onToggle(value, notes, delay)
+    fun performToggle() {
+        value = if (preferences.isSkipEnabled) {
+            Entry.nextToggleValueWithSkip(value)
+        } else {
+            Entry.nextToggleValueWithoutSkip(value)
+        }
+        onToggle(value)
         performHapticFeedback(HapticFeedbackConstants.LONG_PRESS)
         invalidate()
     }
 
     override fun onClick(v: View) {
-        if (preferences.isShortToggleEnabled) performToggle(TOGGLE_DELAY_MILLIS)
-        else onEdit()
+        if (preferences.isShortToggleEnabled) performToggle()
+        else showMessage(resources.getString(R.string.long_press_to_toggle))
     }
 
     override fun onLongClick(v: View): Boolean {
-        if (preferences.isShortToggleEnabled) onEdit()
-        else performToggle(TOGGLE_DELAY_MILLIS)
+        performToggle()
         return true
     }
 
@@ -156,11 +145,6 @@ class CheckmarkButtonView(
                 }
                 else -> R.string.fa_check
             }
-            paint.textSize = when {
-                id == R.string.fa_question -> sp(12.0f)
-                value == YES_AUTO -> sp(13.0f)
-                else -> sp(14.0f)
-            }
             if (value == YES_AUTO) {
                 paint.strokeWidth = 5f
                 paint.style = Paint.Style.STROKE
@@ -169,6 +153,11 @@ class CheckmarkButtonView(
                 paint.style = Paint.Style.FILL
             }
 
+            paint.textSize = when (id) {
+                UNKNOWN -> dim(R.dimen.smallerTextSize)
+                else -> dim(R.dimen.smallTextSize)
+            }
+
             val label = resources.getString(id)
             val em = paint.measureText("m")
 
@@ -181,8 +170,6 @@ class CheckmarkButtonView(
                 paint.style = Paint.Style.FILL
                 canvas.drawText(label, rect.centerX(), rect.centerY(), paint)
             }
-
-            drawNotesIndicator(canvas, color, em, notes)
         }
     }
 }

uhabits-android/src/main/java/org/isoron/uhabits/activities/habits/list/views/CheckmarkPanelView.kt

@@ -54,19 +54,7 @@ class CheckmarkPanelView(
             setupButtons()
         }
 
-    var notes = arrayOf<String>()
-        set(values) {
-            field = values
-            setupButtons()
-        }
-
-    var onToggle: (Timestamp, Int, String, Long) -> Unit = { _, _, _, _ -> }
-        set(value) {
-            field = value
-            setupButtons()
-        }
-
-    var onEdit: (Timestamp) -> Unit = { _ -> }
+    var onToggle: (Timestamp, Int) -> Unit = { _, _ -> }
         set(value) {
             field = value
             setupButtons()
@@ -84,13 +72,8 @@ class CheckmarkPanelView(
                 index + dataOffset < values.size -> values[index + dataOffset]
                 else -> UNKNOWN
             }
-            button.notes = when {
-                index + dataOffset < notes.size -> notes[index + dataOffset]
-                else -> ""
-            }
             button.color = color
-            button.onToggle = { value, notes, delay -> onToggle(timestamp, value, notes, delay) }
-            button.onEdit = { onEdit(timestamp) }
+            button.onToggle = { value -> onToggle(timestamp, value) }
         }
     }
 }

uhabits-android/src/main/java/org/isoron/uhabits/activities/habits/list/views/HabitCardListAdapter.kt

@@ -124,9 +124,8 @@ class HabitCardListAdapter @Inject constructor(
         val habit = cache.getHabitByPosition(position)
         val score = cache.getScore(habit!!.id!!)
         val checkmarks = cache.getCheckmarks(habit.id!!)
-        val notes = cache.getNotes(habit.id!!)
         val selected = selected.contains(habit)
-        listView!!.bindCardView(holder, habit, score, checkmarks, notes, selected)
+        listView!!.bindCardView(holder, habit, score, checkmarks, selected)
     }
 
     override fun onViewAttachedToWindow(holder: HabitCardViewHolder) {

uhabits-android/src/main/java/org/isoron/uhabits/activities/habits/list/views/HabitCardListView.kt

@@ -87,7 +87,6 @@ class HabitCardListView(
         habit: Habit,
         score: Double,
         checkmarks: IntArray,
-        notes: Array<String>,
         selected: Boolean
     ): View {
         val cardView = holder.itemView as HabitCardView
@@ -99,7 +98,6 @@ class HabitCardListView(
         cardView.score = score
         cardView.unit = habit.unit
         cardView.threshold = habit.targetValue / habit.frequency.denominator
-        cardView.notes = notes
 
         val detector = GestureDetector(context, CardViewGestureDetector(holder))
         cardView.setOnTouchListener { _, ev ->

uhabits-android/src/main/java/org/isoron/uhabits/activities/habits/list/views/HabitCardView.kt

@@ -21,8 +21,8 @@ package org.isoron.uhabits.activities.habits.list.views
 
 import android.content.Context
 import android.graphics.text.LineBreaker.BREAK_STRATEGY_BALANCED
-import android.os.Build
 import android.os.Build.VERSION.SDK_INT
+import android.os.Build.VERSION_CODES.M
 import android.os.Handler
 import android.os.Looper
 import android.text.TextUtils
@@ -57,13 +57,6 @@ class HabitCardViewFactory
     fun create() = HabitCardView(context, checkmarkPanelFactory, numberPanelFactory, behavior)
 }
 
-data class DelayedToggle(
-    var habit: Habit,
-    var timestamp: Timestamp,
-    var value: Int,
-    var notes: String
-)
-
 class HabitCardView(
     @ActivityContext context: Context,
     checkmarkPanelFactory: CheckmarkPanelViewFactory,
@@ -122,22 +115,12 @@ class HabitCardView(
             numberPanel.threshold = value
         }
 
-    var notes
-        get() = checkmarkPanel.notes
-        set(values) {
-            checkmarkPanel.notes = values
-            numberPanel.notes = values
-        }
-
     var checkmarkPanel: CheckmarkPanelView
     private var numberPanel: NumberPanelView
     private var innerFrame: LinearLayout
     private var label: TextView
     private var scoreRing: RingView
 
-    private var currentToggleTaskId = 0
-    private var queuedToggles = mutableListOf<DelayedToggle>()
-
     init {
         scoreRing = RingView(context).apply {
             val thickness = dp(3f)
@@ -154,22 +137,13 @@ class HabitCardView(
             maxLines = 2
             ellipsize = TextUtils.TruncateAt.END
             layoutParams = LinearLayout.LayoutParams(0, WRAP_CONTENT, 1f)
-            if (SDK_INT >= Build.VERSION_CODES.Q) {
-                breakStrategy = BREAK_STRATEGY_BALANCED
-            }
+            if (SDK_INT >= M) breakStrategy = BREAK_STRATEGY_BALANCED
         }
 
         checkmarkPanel = checkmarkPanelFactory.create().apply {
-            onToggle = { timestamp, value, notes, delay ->
-                if (delay > 0) triggerRipple(timestamp)
-                habit?.let {
-                    val taskId = queueToggle(it, timestamp, value, notes);
-                    { runPendingToggles(taskId) }.delay(delay)
-                }
-            }
-            onEdit = { timestamp ->
+            onToggle = { timestamp, value ->
                 triggerRipple(timestamp)
-                habit?.let { behavior.onEdit(it, timestamp) }
+                habit?.let { behavior.onToggle(it, timestamp, value) }
             }
         }
 
@@ -205,25 +179,6 @@ class HabitCardView(
         addView(innerFrame)
     }
 
-    @Synchronized
-    private fun runPendingToggles(id: Int) {
-        if (currentToggleTaskId != id) return
-        for ((h, t, v, n) in queuedToggles) behavior.onToggle(h, t, v, n)
-        queuedToggles.clear()
-    }
-
-    @Synchronized
-    private fun queueToggle(
-        it: Habit,
-        timestamp: Timestamp,
-        value: Int,
-        notes: String,
-    ): Int {
-        currentToggleTaskId += 1
-        queuedToggles.add(DelayedToggle(it, timestamp, value, notes))
-        return currentToggleTaskId
-    }
-
     override fun onModelChange() {
         Handler(Looper.getMainLooper()).post {
             habit?.let { copyAttributesFrom(it) }
@@ -281,7 +236,6 @@ class HabitCardView(
         numberPanel.apply {
             color = c
             units = h.unit
-            targetType = h.targetType
             threshold = h.targetValue
             visibility = when (h.isNumerical) {
                 true -> View.VISIBLE
@@ -308,10 +262,4 @@ class HabitCardView(
         }
         innerFrame.setBackgroundResource(background)
     }
-
-    companion object {
-        fun (() -> Unit).delay(delayInMillis: Long) {
-            Handler(Looper.getMainLooper()).postDelayed(this, delayInMillis)
-        }
-    }
 }

uhabits-android/src/main/java/org/isoron/uhabits/activities/habits/list/views/NumberButtonView.kt

@@ -29,16 +29,13 @@ import android.view.View
 import android.view.View.OnClickListener
 import android.view.View.OnLongClickListener
 import org.isoron.uhabits.R
-import org.isoron.uhabits.core.models.Entry
-import org.isoron.uhabits.core.models.NumericalHabitType.AT_LEAST
-import org.isoron.uhabits.core.models.NumericalHabitType.AT_MOST
 import org.isoron.uhabits.core.preferences.Preferences
 import org.isoron.uhabits.inject.ActivityContext
 import org.isoron.uhabits.utils.InterfaceUtils.getDimension
+import org.isoron.uhabits.utils.StyledResources
 import org.isoron.uhabits.utils.dim
-import org.isoron.uhabits.utils.drawNotesIndicator
 import org.isoron.uhabits.utils.getFontAwesome
-import org.isoron.uhabits.utils.sres
+import org.isoron.uhabits.utils.showMessage
 import java.text.DecimalFormat
 import javax.inject.Inject
 
@@ -91,25 +88,13 @@ class NumberButtonView(
             invalidate()
         }
 
-    var targetType = AT_LEAST
-        set(value) {
-            field = value
-            invalidate()
-        }
-
     var units = ""
         set(value) {
             field = value
             invalidate()
         }
-    var notes = ""
-        set(value) {
-            field = value
-            invalidate()
-        }
-
-    var onEdit: () -> Unit = { }
 
+    var onEdit: () -> Unit = {}
     private var drawer: Drawer = Drawer(context)
 
     init {
@@ -118,7 +103,8 @@ class NumberButtonView(
     }
 
     override fun onClick(v: View) {
-        onEdit()
+        if (preferences.isShortToggleEnabled) onEdit()
+        else showMessage(resources.getString(R.string.long_press_to_edit))
     }
 
     override fun onLongClick(v: View): Boolean {
@@ -141,16 +127,11 @@ class NumberButtonView(
 
         private val em: Float
         private val rect: RectF = RectF()
+        private val sr = StyledResources(context)
 
         private val lowContrast: Int
         private val mediumContrast: Int
 
-        private val paint = TextPaint().apply {
-            typeface = getFontAwesome()
-            isAntiAlias = true
-            textAlign = Paint.Align.CENTER
-        }
-
         private val pUnit: TextPaint = TextPaint().apply {
             textSize = getDimension(context, R.dimen.smallerTextSize)
             typeface = NORMAL_TYPEFACE
@@ -167,16 +148,15 @@ class NumberButtonView(
 
         init {
             em = pNumber.measureText("m")
-            lowContrast = sres.getColor(R.attr.contrast40)
-            mediumContrast = sres.getColor(R.attr.contrast60)
+            lowContrast = sr.getColor(R.attr.contrast40)
+            mediumContrast = sr.getColor(R.attr.contrast60)
         }
 
         fun draw(canvas: Canvas) {
             val activeColor = when {
-                value < 0.0 -> lowContrast
-                (targetType == AT_LEAST) && (value >= threshold) -> color
-                (targetType == AT_MOST) && (value <= threshold) -> color
-                else -> mediumContrast
+                value <= 0.0 -> lowContrast
+                value < threshold -> mediumContrast
+                else -> color
             }
 
             val label: String
@@ -184,11 +164,6 @@ class NumberButtonView(
             val textSize: Float
 
             when {
-                value == Entry.SKIP.toDouble() / 1000 -> {
-                    label = resources.getString(R.string.fa_skipped)
-                    textSize = dim(R.dimen.smallTextSize)
-                    typeface = getFontAwesome()
-                }
                 value >= 0 -> {
                     label = value.toShortString()
                     typeface = BOLD_TYPEFACE
@@ -221,8 +196,6 @@ class NumberButtonView(
                 rect.offset(0f, 1.3f * em)
                 canvas.drawText(units, rect.centerX(), rect.centerY(), pUnit)
             }
-
-            drawNotesIndicator(canvas, color, em, notes)
         }
     }
 }

uhabits-android/src/main/java/org/isoron/uhabits/activities/habits/list/views/NumberPanelView.kt

@@ -20,7 +20,6 @@
 package org.isoron.uhabits.activities.habits.list.views
 
 import android.content.Context
-import org.isoron.uhabits.core.models.NumericalHabitType
 import org.isoron.uhabits.core.models.Timestamp
 import org.isoron.uhabits.core.preferences.Preferences
 import org.isoron.uhabits.core.utils.DateUtils
@@ -48,12 +47,6 @@ class NumberPanelView(
             setupButtons()
         }
 
-    var targetType = NumericalHabitType.AT_LEAST
-        set(value) {
-            field = value
-            setupButtons()
-        }
-
     var threshold = 0.0
         set(value) {
             field = value
@@ -72,13 +65,7 @@ class NumberPanelView(
             setupButtons()
         }
 
-    var notes = arrayOf<String>()
-        set(values) {
-            field = values
-            setupButtons()
-        }
-
-    var onEdit: (Timestamp) -> Unit = { _ -> }
+    var onEdit: (Timestamp) -> Unit = {}
         set(value) {
             field = value
             setupButtons()
@@ -96,12 +83,7 @@ class NumberPanelView(
                 index + dataOffset < values.size -> values[index + dataOffset]
                 else -> 0.0
             }
-            button.notes = when {
-                index + dataOffset < notes.size -> notes[index + dataOffset]
-                else -> ""
-            }
             button.color = color
-            button.targetType = targetType
             button.threshold = threshold
             button.units = units
             button.onEdit = { onEdit(timestamp) }

uhabits-android/src/main/java/org/isoron/uhabits/activities/habits/show/ShowHabitActivity.kt

@@ -23,25 +23,21 @@ import android.os.Bundle
 import android.view.HapticFeedbackConstants
 import android.view.Menu
 import android.view.MenuItem
-import android.view.View
 import androidx.appcompat.app.AppCompatActivity
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
-import org.isoron.platform.gui.toInt
 import org.isoron.uhabits.AndroidDirFinder
 import org.isoron.uhabits.HabitsApplication
 import org.isoron.uhabits.R
 import org.isoron.uhabits.activities.AndroidThemeSwitcher
 import org.isoron.uhabits.activities.HabitsDirFinder
-import org.isoron.uhabits.activities.common.dialogs.CheckmarkPopup
 import org.isoron.uhabits.activities.common.dialogs.ConfirmDeleteDialog
 import org.isoron.uhabits.activities.common.dialogs.HistoryEditorDialog
-import org.isoron.uhabits.activities.common.dialogs.NumberPopup
+import org.isoron.uhabits.activities.common.dialogs.NumberPickerFactory
 import org.isoron.uhabits.core.commands.Command
 import org.isoron.uhabits.core.commands.CommandRunner
 import org.isoron.uhabits.core.models.Habit
-import org.isoron.uhabits.core.models.PaletteColor
 import org.isoron.uhabits.core.preferences.Preferences
 import org.isoron.uhabits.core.ui.callbacks.OnConfirmedCallback
 import org.isoron.uhabits.core.ui.screens.habits.list.ListHabitsBehavior
@@ -49,7 +45,6 @@ import org.isoron.uhabits.core.ui.screens.habits.show.ShowHabitMenuPresenter
 import org.isoron.uhabits.core.ui.screens.habits.show.ShowHabitPresenter
 import org.isoron.uhabits.core.ui.views.OnDateClickedListener
 import org.isoron.uhabits.intents.IntentFactory
-import org.isoron.uhabits.utils.currentTheme
 import org.isoron.uhabits.utils.showMessage
 import org.isoron.uhabits.utils.showSendFileScreen
 import org.isoron.uhabits.widgets.WidgetUpdater
@@ -166,49 +161,12 @@ class ShowHabitActivity : AppCompatActivity(), CommandRunner.Listener {
             window.decorView.performHapticFeedback(HapticFeedbackConstants.VIRTUAL_KEY)
         }
 
-        override fun showNumberPopup(
+        override fun showNumberPicker(
             value: Double,
-            notes: String,
-            preferences: Preferences,
-            callback: ListHabitsBehavior.NumberPickerCallback
+            unit: String,
+            callback: ListHabitsBehavior.NumberPickerCallback,
         ) {
-            val anchor = getPopupAnchor() ?: return
-            NumberPopup(
-                context = this@ShowHabitActivity,
-                prefs = preferences,
-                notes = notes,
-                anchor = anchor,
-                value = value,
-            ).apply {
-                onToggle = { v, n -> callback.onNumberPicked(v, n) }
-                show()
-            }
-        }
-
-        override fun showCheckmarkPopup(
-            selectedValue: Int,
-            notes: String,
-            preferences: Preferences,
-            color: PaletteColor,
-            callback: ListHabitsBehavior.CheckMarkDialogCallback
-        ) {
-            val anchor = getPopupAnchor() ?: return
-            CheckmarkPopup(
-                context = this@ShowHabitActivity,
-                prefs = preferences,
-                notes = notes,
-                color = view.currentTheme().color(color).toInt(),
-                anchor = anchor,
-                value = selectedValue,
-            ).apply {
-                onToggle = { v, n -> callback.onNotesSaved(v, n) }
-                show()
-            }
-        }
-
-        private fun getPopupAnchor(): View? {
-            val dialog = supportFragmentManager.findFragmentByTag("historyEditor") as HistoryEditorDialog?
-            return dialog?.dataView
+            NumberPickerFactory(this@ShowHabitActivity).create(value, unit, callback).show()
         }
 
         override fun showEditHabitScreen(habit: Habit) {

uhabits-android/src/main/java/org/isoron/uhabits/activities/habits/show/views/HistoryCardView.kt

@@ -43,8 +43,6 @@ class HistoryCardView(context: Context, attrs: AttributeSet) : LinearLayout(cont
             theme = state.theme,
             dateFormatter = JavaLocalDateFormatter(Locale.getDefault()),
             series = state.series,
-            defaultSquare = state.defaultSquare,
-            notesIndicators = state.notesIndicators,
             firstWeekday = state.firstWeekday,
         )
         binding.chart.postInvalidate()

uhabits-android/src/main/java/org/isoron/uhabits/activities/habits/show/views/SubtitleCardView.kt

@@ -28,7 +28,6 @@ import org.isoron.platform.gui.toInt
 import org.isoron.uhabits.R
 import org.isoron.uhabits.activities.habits.edit.formatFrequency
 import org.isoron.uhabits.activities.habits.list.views.toShortString
-import org.isoron.uhabits.core.models.NumericalHabitType
 import org.isoron.uhabits.core.ui.screens.habits.show.views.SubtitleCardState
 import org.isoron.uhabits.databinding.ShowHabitSubtitleBinding
 import org.isoron.uhabits.utils.InterfaceUtils
@@ -66,12 +65,7 @@ class SubtitleCardView(context: Context, attrs: AttributeSet) : LinearLayout(con
         binding.questionLabel.visibility = View.VISIBLE
         binding.targetIcon.visibility = View.VISIBLE
         binding.targetText.visibility = View.VISIBLE
-        if (state.isNumerical) {
-            binding.targetIcon.text = when (state.targetType) {
-                NumericalHabitType.AT_LEAST -> resources.getString(R.string.fa_arrow_circle_up)
-                else -> resources.getString(R.string.fa_arrow_circle_down)
-            }
-        } else {
+        if (!state.isNumerical) {
             binding.targetIcon.visibility = View.GONE
             binding.targetText.visibility = View.GONE
         }

uhabits-android/src/main/java/org/isoron/uhabits/activities/intro/IntroActivity.kt

@@ -21,9 +21,8 @@ package org.isoron.uhabits.activities.intro
 
 import android.graphics.Color
 import android.os.Bundle
-import androidx.fragment.app.Fragment
-import com.github.appintro.AppIntro2
-import com.github.appintro.AppIntroFragment
+import com.github.paolorotolo.appintro.AppIntro2
+import com.github.paolorotolo.appintro.AppIntroFragment
 import org.isoron.uhabits.R
 
 /**
@@ -31,9 +30,7 @@ import org.isoron.uhabits.R
  * launched for the first time.
  */
 class IntroActivity : AppIntro2() {
-
-    override fun onCreate(savedInstanceState: Bundle?) {
-        super.onCreate(savedInstanceState)
+    override fun init(savedInstanceState: Bundle?) {
         showStatusBar(false)
 
         addSlide(
@@ -64,13 +61,11 @@ class IntroActivity : AppIntro2() {
         )
     }
 
-    override fun onDonePressed(currentFragment: Fragment?) {
-        super.onDonePressed(currentFragment)
+    override fun onNextPressed() {}
+
+    override fun onDonePressed() {
         finish()
     }
 
-    override fun onSkipPressed(currentFragment: Fragment?) {
-        super.onSkipPressed(currentFragment)
-        finish()
-    }
+    override fun onSlideChanged() {}
 }

uhabits-android/src/main/java/org/isoron/uhabits/activities/settings/SettingsFragment.kt

@@ -19,14 +19,16 @@
 package org.isoron.uhabits.activities.settings
 
 import android.app.backup.BackupManager
+import android.content.Context
 import android.content.Intent
 import android.content.SharedPreferences
 import android.content.SharedPreferences.OnSharedPreferenceChangeListener
 import android.os.Build
-import android.os.Build.VERSION.SDK_INT
+import android.os.Build.VERSION
 import android.os.Bundle
 import android.provider.Settings
 import android.util.Log
+import androidx.preference.CheckBoxPreference
 import androidx.preference.ListPreference
 import androidx.preference.Preference
 import androidx.preference.PreferenceCategory
@@ -41,6 +43,7 @@ import org.isoron.uhabits.activities.habits.list.RESULT_REPAIR_DB
 import org.isoron.uhabits.core.preferences.Preferences
 import org.isoron.uhabits.core.ui.NotificationTray
 import org.isoron.uhabits.core.utils.DateUtils.Companion.getLongWeekdayNames
+import org.isoron.uhabits.intents.IntentFactory
 import org.isoron.uhabits.notifications.AndroidNotificationTray.Companion.createAndroidNotificationChannel
 import org.isoron.uhabits.notifications.RingtoneManager
 import org.isoron.uhabits.widgets.WidgetUpdater
@@ -90,13 +93,20 @@ class SettingsFragment : PreferenceFragmentCompat(), OnSharedPreferenceChangeLis
             showRingtonePicker()
             return true
         } else if (key == "reminderCustomize") {
-            if (SDK_INT < Build.VERSION_CODES.O) return true
+            if (VERSION.SDK_INT < Build.VERSION_CODES.O) return true
             createAndroidNotificationChannel(context!!)
             val intent = Intent(Settings.ACTION_CHANNEL_NOTIFICATION_SETTINGS)
             intent.putExtra(Settings.EXTRA_APP_PACKAGE, context!!.packageName)
             intent.putExtra(Settings.EXTRA_CHANNEL_ID, NotificationTray.REMINDERS_CHANNEL_ID)
             startActivity(intent)
             return true
+        } else if (key == "pref_sync_enabled_dummy") {
+            if (prefs.isSyncEnabled) {
+                prefs.disableSync()
+            } else {
+                val context: Context? = activity
+                context!!.startActivity(IntentFactory().startSyncActivity(context))
+            }
         }
         return super.onPreferenceTreeClick(preference)
     }
@@ -111,14 +121,21 @@ class SettingsFragment : PreferenceFragmentCompat(), OnSharedPreferenceChangeLis
             devCategory.isVisible = false
         }
         updateWeekdayPreference()
+        updateSyncPreferences()
 
-        if (SDK_INT < Build.VERSION_CODES.O)
+        if (VERSION.SDK_INT < Build.VERSION_CODES.O)
             findPreference("reminderCustomize").isVisible = false
         else {
             findPreference("reminderSound").isVisible = false
         }
     }
 
+    private fun updateSyncPreferences() {
+        findPreference("pref_sync_display").isVisible = prefs.isSyncEnabled
+        (findPreference("pref_sync_enabled_dummy") as CheckBoxPreference).isChecked =
+            prefs.isSyncEnabled
+    }
+
     private fun updateWeekdayPreference() {
         val weekdayPref = findPreference("pref_first_weekday") as ListPreference
         val currentFirstWeekday = prefs.firstWeekday.daysSinceSunday + 1
@@ -140,6 +157,7 @@ class SettingsFragment : PreferenceFragmentCompat(), OnSharedPreferenceChangeLis
         }
         BackupManager.dataChanged("org.isoron.uhabits")
         updateWeekdayPreference()
+        updateSyncPreferences()
     }
 
     private fun setResultOnPreferenceClick(key: String, result: Int) {

uhabits-android/src/main/java/org/isoron/uhabits/activities/sync/SyncActivity.kt

@@ -0,0 +1,132 @@
+/*
+ * Copyright (C) 2016-2021 Álinson Santos Xavier <git@axavier.org>
+ *
+ * This file is part of Loop Habit Tracker.
+ *
+ * Loop Habit Tracker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * Loop Habit Tracker is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.isoron.uhabits.activities.sync
+
+import android.content.ClipData
+import android.content.ClipboardManager
+import android.content.Context
+import android.graphics.Bitmap
+import android.graphics.Color
+import android.os.Bundle
+import android.text.Html
+import android.view.View
+import androidx.appcompat.app.AppCompatActivity
+import com.google.zxing.BarcodeFormat
+import com.google.zxing.qrcode.QRCodeWriter
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.invoke
+import kotlinx.coroutines.launch
+import org.isoron.uhabits.HabitsApplication
+import org.isoron.uhabits.R
+import org.isoron.uhabits.activities.AndroidThemeSwitcher
+import org.isoron.uhabits.core.models.PaletteColor
+import org.isoron.uhabits.core.ui.screens.sync.SyncBehavior
+import org.isoron.uhabits.databinding.ActivitySyncBinding
+import org.isoron.uhabits.sync.RemoteSyncServer
+import org.isoron.uhabits.utils.InterfaceUtils.getFontAwesome
+import org.isoron.uhabits.utils.setupToolbar
+import org.isoron.uhabits.utils.showMessage
+
+class SyncActivity : AppCompatActivity(), SyncBehavior.Screen {
+
+    private lateinit var binding: ActivitySyncBinding
+    private lateinit var behavior: SyncBehavior
+
+    private val scope = CoroutineScope(Dispatchers.Main)
+
+    override fun onCreate(savedInstance: Bundle?) {
+        super.onCreate(savedInstance)
+        val component = (application as HabitsApplication).component
+        val preferences = component.preferences
+        val server = RemoteSyncServer(preferences = preferences)
+        val themeSwitcher = AndroidThemeSwitcher(this, component.preferences)
+        themeSwitcher.apply()
+
+        behavior = SyncBehavior(this, preferences, server, component.logging)
+        binding = ActivitySyncBinding.inflate(layoutInflater)
+        binding.errorIcon.typeface = getFontAwesome(this)
+        binding.root.setupToolbar(
+            toolbar = binding.toolbar,
+            color = PaletteColor(11),
+            title = resources.getString(R.string.device_sync),
+            theme = themeSwitcher.currentTheme,
+        )
+        binding.syncLink.setOnClickListener { copyToClipboard() }
+        binding.instructions.text = Html.fromHtml(resources.getString(R.string.sync_instructions))
+        setContentView(binding.root)
+    }
+
+    override fun onResume() {
+        super.onResume()
+        scope.launch {
+            behavior.onResume()
+        }
+    }
+
+    private fun copyToClipboard() {
+        val clipboard = getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
+        clipboard.setPrimaryClip(ClipData.newPlainText("Loop Sync Link", binding.syncLink.text))
+        showMessage(resources.getString(R.string.copied_to_the_clipboard))
+    }
+
+    suspend fun generateQR(msg: String): Bitmap = Dispatchers.IO {
+        val writer = QRCodeWriter()
+        val matrix = writer.encode(msg, BarcodeFormat.QR_CODE, 1024, 1024)
+        val height = matrix.height
+        val width = matrix.width
+        val bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565)
+        val bgColor = Color.WHITE
+        val fgColor = Color.BLACK
+        for (x in 0 until width) {
+            for (y in 0 until height) {
+                val color = if (matrix.get(x, y)) fgColor else bgColor
+                bitmap.setPixel(x, y, color)
+            }
+        }
+        return@IO bitmap
+    }
+
+    suspend fun showQR(msg: String) {
+        binding.progress.visibility = View.GONE
+        binding.qrCode.visibility = View.VISIBLE
+        binding.qrCode.setImageBitmap(generateQR(msg))
+    }
+
+    override suspend fun showLoadingScreen() {
+        binding.qrCode.visibility = View.GONE
+        binding.progress.visibility = View.VISIBLE
+        binding.errorPanel.visibility = View.GONE
+    }
+
+    override suspend fun showErrorScreen() {
+        binding.qrCode.visibility = View.GONE
+        binding.progress.visibility = View.GONE
+        binding.errorPanel.visibility = View.VISIBLE
+    }
+
+    override suspend fun showLink(link: String) {
+        binding.qrCode.visibility = View.GONE
+        binding.progress.visibility = View.VISIBLE
+        binding.errorPanel.visibility = View.GONE
+        binding.syncLink.text = link
+        showQR(link)
+    }
+}

uhabits-android/src/main/java/org/isoron/uhabits/automation/EditSettingActivity.kt

@@ -23,17 +23,17 @@ import android.os.Bundle
 import androidx.appcompat.app.AppCompatActivity
 import org.isoron.uhabits.HabitsApplication
 import org.isoron.uhabits.activities.AndroidThemeSwitcher
-import org.isoron.uhabits.core.models.HabitMatcher
+import org.isoron.uhabits.core.models.HabitMatcherBuilder
 
 class EditSettingActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         val app = applicationContext as HabitsApplication
         val habits = app.component.habitList.getFiltered(
-            HabitMatcher(
-                isArchivedAllowed = false,
-                isCompletedAllowed = true,
-            )
+            HabitMatcherBuilder()
+                .setArchivedAllowed(false)
+                .setCompletedAllowed(true)
+                .build()
         )
         AndroidThemeSwitcher(this, app.component.preferences).apply()
 

uhabits-android/src/main/java/org/isoron/uhabits/inject/HabitsApplicationComponent.kt

@@ -29,6 +29,7 @@ import org.isoron.uhabits.core.models.ModelFactory
 import org.isoron.uhabits.core.preferences.Preferences
 import org.isoron.uhabits.core.preferences.WidgetPreferences
 import org.isoron.uhabits.core.reminders.ReminderScheduler
+import org.isoron.uhabits.core.sync.SyncManager
 import org.isoron.uhabits.core.tasks.TaskRunner
 import org.isoron.uhabits.core.ui.NotificationTray
 import org.isoron.uhabits.core.ui.screens.habits.list.HabitCardListCache
@@ -63,4 +64,5 @@ interface HabitsApplicationComponent {
     val taskRunner: TaskRunner
     val widgetPreferences: WidgetPreferences
     val widgetUpdater: WidgetUpdater
+    val syncManager: SyncManager
 }

uhabits-android/src/main/java/org/isoron/uhabits/inject/HabitsModule.kt

@@ -19,6 +19,7 @@
 
 package org.isoron.uhabits.inject
 
+import android.content.Context
 import dagger.Module
 import dagger.Provides
 import org.isoron.uhabits.core.AppScope
@@ -33,6 +34,8 @@ import org.isoron.uhabits.core.models.sqlite.SQLiteHabitList
 import org.isoron.uhabits.core.preferences.Preferences
 import org.isoron.uhabits.core.preferences.WidgetPreferences
 import org.isoron.uhabits.core.reminders.ReminderScheduler
+import org.isoron.uhabits.core.sync.AbstractSyncServer
+import org.isoron.uhabits.core.sync.NetworkManager
 import org.isoron.uhabits.core.tasks.TaskRunner
 import org.isoron.uhabits.core.ui.NotificationTray
 import org.isoron.uhabits.database.AndroidDatabase
@@ -41,6 +44,8 @@ import org.isoron.uhabits.intents.IntentScheduler
 import org.isoron.uhabits.io.AndroidLogging
 import org.isoron.uhabits.notifications.AndroidNotificationTray
 import org.isoron.uhabits.preferences.SharedPreferencesStorage
+import org.isoron.uhabits.sync.AndroidNetworkManager
+import org.isoron.uhabits.sync.RemoteSyncServer
 import org.isoron.uhabits.utils.DatabaseUtils
 import java.io.File
 
@@ -109,6 +114,18 @@ class HabitsModule(dbFile: File) {
         return AndroidLogging()
     }
 
+    @Provides
+    @AppScope
+    fun getNetworkManager(@AppContext context: Context): NetworkManager {
+        return AndroidNetworkManager(context)
+    }
+
+    @Provides
+    @AppScope
+    fun getSyncServer(preferences: Preferences): AbstractSyncServer {
+        return RemoteSyncServer(preferences)
+    }
+
     @Provides
     @AppScope
     fun getDatabase(): Database {

uhabits-android/src/main/java/org/isoron/uhabits/intents/IntentFactory.kt

@@ -28,6 +28,7 @@ import org.isoron.uhabits.activities.habits.edit.EditHabitActivity
 import org.isoron.uhabits.activities.habits.show.ShowHabitActivity
 import org.isoron.uhabits.activities.intro.IntroActivity
 import org.isoron.uhabits.activities.settings.SettingsActivity
+import org.isoron.uhabits.activities.sync.SyncActivity
 import org.isoron.uhabits.core.models.Habit
 import javax.inject.Inject
 
@@ -100,4 +101,8 @@ class IntentFactory
         intent.putExtra("habitType", habitType)
         return intent
     }
+
+    fun startSyncActivity(context: Context): Intent {
+        return Intent(context, SyncActivity::class.java)
+    }
 }

uhabits-android/src/main/java/org/isoron/uhabits/intents/IntentScheduler.kt

@@ -25,6 +25,8 @@ import android.app.AlarmManager.RTC_WAKEUP
 import android.app.PendingIntent
 import android.content.Context
 import android.content.Context.ALARM_SERVICE
+import android.os.Build.VERSION.SDK_INT
+import android.os.Build.VERSION_CODES.M
 import android.util.Log
 import org.isoron.uhabits.core.AppScope
 import org.isoron.uhabits.core.models.Habit
@@ -56,7 +58,10 @@ class IntentScheduler
             )
             return SchedulerResult.IGNORED
         }
+        if (SDK_INT >= M)
             manager.setExactAndAllowWhileIdle(alarmType, timestamp, intent)
+        else
+            manager.setExact(alarmType, timestamp, intent)
         return SchedulerResult.OK
     }
 

uhabits-android/src/main/java/org/isoron/uhabits/intents/PendingIntentFactory.kt

@@ -20,7 +20,6 @@
 package org.isoron.uhabits.intents
 
 import android.app.PendingIntent
-import android.app.PendingIntent.FLAG_IMMUTABLE
 import android.app.PendingIntent.FLAG_UPDATE_CURRENT
 import android.app.PendingIntent.getBroadcast
 import android.content.Context
@@ -50,7 +49,7 @@ class PendingIntentFactory
                 action = WidgetReceiver.ACTION_ADD_REPETITION
                 if (timestamp != null) putExtra("timestamp", timestamp.unixTime)
             },
-            FLAG_IMMUTABLE or FLAG_UPDATE_CURRENT
+            FLAG_UPDATE_CURRENT
         )
 
     fun dismissNotification(habit: Habit): PendingIntent =
@@ -61,7 +60,7 @@ class PendingIntentFactory
                 action = WidgetReceiver.ACTION_DISMISS_REMINDER
                 data = Uri.parse(habit.uriString)
             },
-            FLAG_IMMUTABLE or FLAG_UPDATE_CURRENT
+            FLAG_UPDATE_CURRENT
         )
 
     fun removeRepetition(habit: Habit, timestamp: Timestamp?): PendingIntent =
@@ -73,7 +72,7 @@ class PendingIntentFactory
                 data = Uri.parse(habit.uriString)
                 if (timestamp != null) putExtra("timestamp", timestamp.unixTime)
             },
-            FLAG_IMMUTABLE or FLAG_UPDATE_CURRENT
+            FLAG_UPDATE_CURRENT
         )
 
     fun showHabit(habit: Habit): PendingIntent =
@@ -85,7 +84,7 @@ class PendingIntentFactory
                     habit
                 )
             )
-            .getPendingIntent(0, FLAG_IMMUTABLE or FLAG_UPDATE_CURRENT)!!
+            .getPendingIntent(0, FLAG_UPDATE_CURRENT)!!
 
     fun showReminder(
         habit: Habit,
@@ -101,7 +100,7 @@ class PendingIntentFactory
                 putExtra("timestamp", timestamp)
                 putExtra("reminderTime", reminderTime)
             },
-            FLAG_IMMUTABLE or FLAG_UPDATE_CURRENT
+            FLAG_UPDATE_CURRENT
         )
 
     fun snoozeNotification(habit: Habit): PendingIntent =
@@ -112,7 +111,7 @@ class PendingIntentFactory
                 data = Uri.parse(habit.uriString)
                 action = ReminderReceiver.ACTION_SNOOZE_REMINDER
             },
-            FLAG_IMMUTABLE or FLAG_UPDATE_CURRENT
+            FLAG_UPDATE_CURRENT
         )
 
     fun toggleCheckmark(habit: Habit, timestamp: Long?): PendingIntent =
@@ -124,7 +123,7 @@ class PendingIntentFactory
                 action = WidgetReceiver.ACTION_TOGGLE_REPETITION
                 if (timestamp != null) putExtra("timestamp", timestamp)
             },
-            FLAG_IMMUTABLE or FLAG_UPDATE_CURRENT
+            FLAG_UPDATE_CURRENT
         )
 
     fun setNumericalValue(
@@ -143,7 +142,7 @@ class PendingIntentFactory
                 putExtra("numericalValue", numericalValue)
                 if (timestamp != null) putExtra("timestamp", timestamp)
             },
-            FLAG_IMMUTABLE or FLAG_UPDATE_CURRENT
+            FLAG_UPDATE_CURRENT
         )
 
     fun updateWidgets(): PendingIntent =
@@ -153,6 +152,6 @@ class PendingIntentFactory
             Intent(context, WidgetReceiver::class.java).apply {
                 action = WidgetReceiver.ACTION_UPDATE_WIDGETS_VALUE
             },
-            FLAG_IMMUTABLE or FLAG_UPDATE_CURRENT
+            FLAG_UPDATE_CURRENT
         )
 }

uhabits-android/src/main/java/org/isoron/uhabits/notifications/AndroidNotificationTray.kt

@@ -25,6 +25,7 @@ import android.app.NotificationChannel
 import android.app.NotificationManager
 import android.content.Context
 import android.graphics.BitmapFactory.decodeResource
+import android.graphics.Color
 import android.os.Build
 import android.os.Build.VERSION.SDK_INT
 import android.util.Log
@@ -149,7 +150,9 @@ class AndroidNotificationTray
         if (!disableSound)
             builder.setSound(ringtoneManager.getURI())
 
-        if (SDK_INT < Build.VERSION_CODES.S) {
+        if (preferences.shouldMakeNotificationsLed())
+            builder.setLights(Color.RED, 1000, 1000)
+
         val snoozeAction = Action(
             R.drawable.ic_action_snooze,
             context.getString(R.string.snooze),
@@ -157,7 +160,6 @@ class AndroidNotificationTray
         )
         wearableExtender.addAction(snoozeAction)
         builder.addAction(snoozeAction)
-        }
 
         builder.extend(wearableExtender)
         return builder.build()

uhabits-android/src/main/java/org/isoron/uhabits/preferences/SharedPreferencesStorage.kt

@@ -90,6 +90,8 @@ class SharedPreferencesStorage
                 preferences.isMidnightDelayEnabled = getBoolean(key, false)
             "pref_sticky_notifications" ->
                 preferences.setNotificationsSticky(getBoolean(key, false))
+            "pref_led_notifications" ->
+                preferences.setNotificationsLed(getBoolean(key, false))
             "pref_unknown_enabled" -> {
                 preferences.areQuestionMarksEnabled = getBoolean(key, false)
             }

uhabits-android/src/main/java/org/isoron/uhabits/receivers/ReminderReceiver.kt

@@ -22,8 +22,6 @@ import android.content.BroadcastReceiver
 import android.content.ContentUris
 import android.content.Context
 import android.content.Intent
-import android.os.Build
-import android.os.Build.VERSION.SDK_INT
 import android.util.Log
 import org.isoron.uhabits.HabitsApplication
 import org.isoron.uhabits.core.models.Habit
@@ -78,21 +76,8 @@ class ReminderReceiver : BroadcastReceiver() {
                 }
                 ACTION_SNOOZE_REMINDER -> {
                     if (habit == null) return
-                    if (SDK_INT < Build.VERSION_CODES.S) {
-                        Log.d(
-                            "ReminderReceiver",
-                            String.format("onSnoozePressed habit=%d", habit.id)
-                        )
+                    Log.d("ReminderReceiver", String.format("onSnoozePressed habit=%d", habit.id))
                     reminderController.onSnoozePressed(habit, context)
-                    } else {
-                        Log.w(
-                            "ReminderReceiver",
-                            String.format(
-                                "onSnoozePressed habit=%d, should be deactivated in recent versions.",
-                                habit.id
-                            )
-                        )
-                    }
                 }
                 Intent.ACTION_BOOT_COMPLETED -> {
                     Log.d("ReminderReceiver", "onBootCompleted")

uhabits-android/src/main/java/org/isoron/uhabits/sync/AndroidNetworkManager.kt

@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2016-2021 Álinson Santos Xavier <git@axavier.org>
+ *
+ * This file is part of Loop Habit Tracker.
+ *
+ * Loop Habit Tracker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * Loop Habit Tracker is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.isoron.uhabits.sync
+
+import android.content.Context
+import android.net.ConnectivityManager
+import android.net.Network
+import android.net.NetworkRequest
+import org.isoron.uhabits.core.sync.NetworkManager
+
+class AndroidNetworkManager(
+    val context: Context,
+) : NetworkManager, ConnectivityManager.NetworkCallback() {
+
+    val listeners = mutableListOf<NetworkManager.Listener>()
+    var connected = false
+
+    init {
+        val cm = context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
+        cm.registerNetworkCallback(NetworkRequest.Builder().build(), this)
+    }
+
+    override fun addListener(listener: NetworkManager.Listener) {
+        if (connected) listener.onNetworkAvailable()
+        else listener.onNetworkLost()
+        listeners.add(listener)
+    }
+
+    override fun remoteListener(listener: NetworkManager.Listener) {
+        listeners.remove(listener)
+    }
+
+    override fun onAvailable(network: Network) {
+        connected = true
+        for (l in listeners) l.onNetworkAvailable()
+    }
+
+    override fun onLost(network: Network) {
+        connected = false
+        for (l in listeners) l.onNetworkLost()
+    }
+}

uhabits-android/src/main/java/org/isoron/uhabits/sync/RemoteSyncServer.kt

@@ -0,0 +1,105 @@
+/*
+ * Copyright (C) 2016-2021 Álinson Santos Xavier <git@axavier.org>
+ *
+ * This file is part of Loop Habit Tracker.
+ *
+ * Loop Habit Tracker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * Loop Habit Tracker is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.isoron.uhabits.sync
+
+import android.util.Log
+import io.ktor.client.HttpClient
+import io.ktor.client.engine.android.Android
+import io.ktor.client.features.ClientRequestException
+import io.ktor.client.features.ServerResponseException
+import io.ktor.client.features.json.JsonFeature
+import io.ktor.client.request.get
+import io.ktor.client.request.header
+import io.ktor.client.request.post
+import io.ktor.client.request.put
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.invoke
+import org.isoron.uhabits.core.preferences.Preferences
+import org.isoron.uhabits.core.sync.AbstractSyncServer
+import org.isoron.uhabits.core.sync.EditConflictException
+import org.isoron.uhabits.core.sync.GetDataVersionResponse
+import org.isoron.uhabits.core.sync.KeyNotFoundException
+import org.isoron.uhabits.core.sync.RegisterReponse
+import org.isoron.uhabits.core.sync.ServiceUnavailable
+import org.isoron.uhabits.core.sync.SyncData
+
+class RemoteSyncServer(
+    private val preferences: Preferences,
+    private val httpClient: HttpClient = HttpClient(Android) {
+        install(JsonFeature)
+    }
+) : AbstractSyncServer {
+
+    override suspend fun register(): String = Dispatchers.IO {
+        try {
+            val url = "${preferences.syncBaseURL}/register"
+            Log.i("RemoteSyncServer", "POST $url")
+            val response: RegisterReponse = httpClient.post(url)
+            return@IO response.key
+        } catch (e: ServerResponseException) {
+            throw ServiceUnavailable()
+        }
+    }
+
+    override suspend fun put(key: String, newData: SyncData) = Dispatchers.IO {
+        try {
+            val url = "${preferences.syncBaseURL}/db/$key"
+            Log.i("RemoteSyncServer", "PUT $url")
+            val response: String = httpClient.put(url) {
+                header("Content-Type", "application/json")
+                body = newData
+            }
+        } catch (e: ServerResponseException) {
+            throw ServiceUnavailable()
+        } catch (e: ClientRequestException) {
+            Log.w("RemoteSyncServer", "ClientRequestException", e)
+            if (e.message!!.contains("409")) throw EditConflictException()
+            if (e.message!!.contains("404")) throw KeyNotFoundException()
+            throw e
+        }
+    }
+
+    override suspend fun getData(key: String): SyncData = Dispatchers.IO {
+        try {
+            val url = "${preferences.syncBaseURL}/db/$key"
+            Log.i("RemoteSyncServer", "GET $url")
+            return@IO httpClient.get<SyncData>(url)
+        } catch (e: ServerResponseException) {
+            throw ServiceUnavailable()
+        } catch (e: ClientRequestException) {
+            Log.w("RemoteSyncServer", "ClientRequestException", e)
+            throw KeyNotFoundException()
+        }
+    }
+
+    override suspend fun getDataVersion(key: String): Long = Dispatchers.IO {
+        try {
+            val url = "${preferences.syncBaseURL}/db/$key/version"
+            Log.i("RemoteSyncServer", "GET $url")
+            val response: GetDataVersionResponse = httpClient.get(url)
+            return@IO response.version
+        } catch (e: ServerResponseException) {
+            throw ServiceUnavailable()
+        } catch (e: ClientRequestException) {
+            Log.w("RemoteSyncServer", "ClientRequestException", e)
+            throw KeyNotFoundException()
+        }
+    }
+}

uhabits-android/src/main/java/org/isoron/uhabits/utils/SystemUtils.kt

@@ -22,13 +22,14 @@ import android.app.Activity
 import android.app.KeyguardManager
 import android.content.Context
 import android.os.Build
-import android.os.Build.VERSION.SDK_INT
 import android.view.WindowManager
 
 object SystemUtils {
+    val isAndroidOOrLater: Boolean
+        get() = Build.VERSION.SDK_INT >= Build.VERSION_CODES.O
 
     fun unlockScreen(activity: Activity) {
-        if (SDK_INT >= Build.VERSION_CODES.O) {
+        if (isAndroidOOrLater) {
             val km = activity.getSystemService(Context.KEYGUARD_SERVICE) as KeyguardManager
             km.requestDismissKeyguard(activity, null)
         } else {

uhabits-android/src/main/java/org/isoron/uhabits/utils/ViewExtensions.kt

@@ -20,22 +20,16 @@
 package org.isoron.uhabits.utils
 
 import android.app.Activity
-import android.app.Dialog
 import android.content.ActivityNotFoundException
 import android.content.Intent
-import android.graphics.Canvas
 import android.graphics.Color
-import android.graphics.Paint
 import android.graphics.drawable.ColorDrawable
 import android.os.Handler
-import android.os.SystemClock
 import android.view.LayoutInflater
-import android.view.MotionEvent
 import android.view.View
 import android.view.ViewGroup
 import android.view.ViewGroup.LayoutParams.MATCH_PARENT
 import android.view.ViewGroup.LayoutParams.WRAP_CONTENT
-import android.view.WindowManager
 import android.widget.RelativeLayout
 import android.widget.RelativeLayout.ALIGN_PARENT_BOTTOM
 import android.widget.RelativeLayout.ALIGN_PARENT_TOP
@@ -205,33 +199,5 @@ fun View.dim(id: Int) = InterfaceUtils.getDimension(context, id)
 fun View.sp(value: Float) = InterfaceUtils.spToPixels(context, value)
 fun View.dp(value: Float) = InterfaceUtils.dpToPixels(context, value)
 fun View.str(id: Int) = resources.getString(id)
-
-fun View.drawNotesIndicator(canvas: Canvas, color: Int, size: Float, notes: String) {
-    val pNotesIndicator = Paint()
-    pNotesIndicator.color = color
-    if (notes.isNotBlank()) {
-        val cy = 0.8f * size
-        canvas.drawCircle(width.toFloat() - cy, cy, 8f, pNotesIndicator)
-    }
-}
-
 val View.sres: StyledResources
     get() = StyledResources(context)
-
-fun Dialog.dimBehind() {
-    window?.addFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND)
-    window?.setDimAmount(0.5f)
-}
-
-fun View.requestFocusWithKeyboard() {
-    // For some reason, Android does not open the soft keyboard by default when view.requestFocus
-    // is called. Several online solutions suggest using InputMethodManager, but these solutions
-    // are not reliable; sometimes the keyboard does not show, and sometimes it does not go away
-    // after focus is lost. Here, we simulate a click on the view, which triggers the keyboard.
-    // Based on: https://stackoverflow.com/a/7699556
-    postDelayed({
-        val time = SystemClock.uptimeMillis()
-        dispatchTouchEvent(MotionEvent.obtain(time, time, MotionEvent.ACTION_DOWN, 0f, 0f, 0))
-        dispatchTouchEvent(MotionEvent.obtain(time, time, MotionEvent.ACTION_UP, 0f, 0f, 0))
-    }, 250)
-}

uhabits-android/src/main/java/org/isoron/uhabits/widgets/HistoryWidget.kt

@@ -56,10 +56,7 @@ class HistoryWidget(
             theme = WidgetTheme(),
         )
         (widgetView.dataView as AndroidDataView).apply {
-            val historyChart = (this.view as HistoryChart)
-            historyChart.series = model.series
-            historyChart.defaultSquare = model.defaultSquare
-            historyChart.notesIndicators = model.notesIndicators
+            (this.view as HistoryChart).series = model.series
         }
     }
 
@@ -74,8 +71,6 @@ class HistoryWidget(
                     dateFormatter = JavaLocalDateFormatter(Locale.getDefault()),
                     firstWeekday = prefs.firstWeekday,
                     series = listOf(),
-                    defaultSquare = HistoryChart.Square.OFF,
-                    notesIndicators = listOf(),
                 )
             }
         ).apply {

uhabits-android/src/main/java/org/isoron/uhabits/widgets/StackWidget.kt

@@ -26,8 +26,8 @@ import android.content.Intent
 import android.net.Uri
 import android.view.View
 import android.widget.RemoteViews
-import org.isoron.platform.utils.StringUtils
 import org.isoron.uhabits.core.models.Habit
+import org.isoron.uhabits.core.utils.StringUtils
 
 class StackWidget(
     context: Context,

uhabits-android/src/main/java/org/isoron/uhabits/widgets/StackWidgetService.kt

@@ -27,11 +27,11 @@ import android.util.Log
 import android.widget.RemoteViews
 import android.widget.RemoteViewsService
 import android.widget.RemoteViewsService.RemoteViewsFactory
-import org.isoron.platform.utils.StringUtils.Companion.splitLongs
 import org.isoron.uhabits.HabitsApplication
 import org.isoron.uhabits.core.models.Habit
 import org.isoron.uhabits.core.models.HabitNotFoundException
 import org.isoron.uhabits.core.preferences.Preferences
+import org.isoron.uhabits.core.utils.StringUtils.Companion.splitLongs
 import org.isoron.uhabits.utils.InterfaceUtils.dpToPixels
 import java.util.ArrayList
 

uhabits-android/src/main/java/org/isoron/uhabits/widgets/activities/NumericalCheckmarkWidgetActivity.kt

@@ -22,12 +22,11 @@ package org.isoron.uhabits.widgets.activities
 import android.app.Activity
 import android.content.Context
 import android.os.Bundle
-import android.view.View
-import android.view.ViewGroup.LayoutParams.MATCH_PARENT
+import android.view.Window
 import android.widget.FrameLayout
 import org.isoron.uhabits.HabitsApplication
 import org.isoron.uhabits.activities.AndroidThemeSwitcher
-import org.isoron.uhabits.activities.common.dialogs.NumberPopup
+import org.isoron.uhabits.activities.common.dialogs.NumberPickerFactory
 import org.isoron.uhabits.core.ui.screens.habits.list.ListHabitsBehavior
 import org.isoron.uhabits.core.ui.widgets.WidgetBehavior
 import org.isoron.uhabits.core.utils.DateUtils
@@ -40,13 +39,11 @@ class NumericalCheckmarkWidgetActivity : Activity(), ListHabitsBehavior.NumberPi
     private lateinit var behavior: WidgetBehavior
     private lateinit var data: IntentParser.CheckmarkIntentData
     private lateinit var widgetUpdater: WidgetUpdater
-    private lateinit var rootView: View
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        rootView = FrameLayout(this)
-        rootView.layoutParams = FrameLayout.LayoutParams(MATCH_PARENT, MATCH_PARENT)
-        setContentView(rootView)
+        requestWindowFeature(Window.FEATURE_NO_TITLE)
+        setContentView(FrameLayout(this))
         val app = this.applicationContext as HabitsApplication
         val component = app.component
         val parser = app.component.intentParser
@@ -58,14 +55,13 @@ class NumericalCheckmarkWidgetActivity : Activity(), ListHabitsBehavior.NumberPi
             component.preferences
         )
         widgetUpdater = component.widgetUpdater
-        rootView.post {
         showNumberSelector(this)
-        }
+
         SystemUtils.unlockScreen(this)
     }
 
-    override fun onNumberPicked(newValue: Double, notes: String) {
-        behavior.setValue(data.habit, data.timestamp, (newValue * 1000).toInt(), notes)
+    override fun onNumberPicked(newValue: Double) {
+        behavior.setValue(data.habit, data.timestamp, (newValue * 1000).toInt())
         widgetUpdater.updateWidgets()
         finish()
     }
@@ -77,22 +73,14 @@ class NumericalCheckmarkWidgetActivity : Activity(), ListHabitsBehavior.NumberPi
     private fun showNumberSelector(context: Context) {
         val app = this.applicationContext as HabitsApplication
         AndroidThemeSwitcher(this, app.component.preferences).apply()
+        val numberPickerFactory = NumberPickerFactory(context)
         val today = DateUtils.getTodayWithOffset()
         val entry = data.habit.computedEntries.get(today)
-        NumberPopup(
-            context = context,
-            prefs = app.component.preferences,
-            anchor = rootView,
-            notes = entry.notes,
-            value = entry.value / 1000.0,
-        ).apply {
-            onToggle = { value, notes ->
-                onNumberPicked(value, notes)
-                finish()
-                overridePendingTransition(0, 0)
-            }
-            show()
-        }
+        numberPickerFactory.create(
+            entry.value / 1000.0,
+            data.habit.unit,
+            this
+        ).show()
     }
 
     companion object {

uhabits-android/src/main/res/drawable-anydpi/ic_arrow_down_dark.xml

@@ -0,0 +1,11 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:tint="#FFFFFF"
+    android:alpha="0.8">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M20,12l-1.41,-1.41L13,16.17V4h-2v12.17l-5.58,-5.59L4,12l8,8 8,-8z"/>
+</vector>

uhabits-android/src/main/res/drawable-anydpi/ic_arrow_down_light.xml

@@ -0,0 +1,11 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:tint="#333333"
+    android:alpha="0.6">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M20,12l-1.41,-1.41L13,16.17V4h-2v12.17l-5.58,-5.59L4,12l8,8 8,-8z"/>
+</vector>

uhabits-android/src/main/res/drawable-anydpi/ic_arrow_up_dark.xml

@@ -0,0 +1,11 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:tint="#FFFFFF"
+    android:alpha="0.8">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M4,12l1.41,1.41L11,7.83V20h2V7.83l5.58,5.59L20,12l-8,-8 -8,8z"/>
+</vector>

uhabits-android/src/main/res/drawable-anydpi/ic_arrow_up_light.xml

@@ -0,0 +1,11 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:tint="#333333"
+    android:alpha="0.6">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M4,12l1.41,1.41L11,7.83V20h2V7.83l5.58,5.59L20,12l-8,-8 -8,8z"/>
+</vector>