Add configuration activity for widgets

app/src/main/AndroidManifest.xml

@@ -10,11 +10,11 @@
 
     <application
         android:name="com.activeandroid.app.Application"
+        android:allowBackup="true"
+        android:backupAgent=".HabitsBackupAgent"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/main_activity_title"
-        android:theme="@style/AppBaseTheme"
-        android:allowBackup="true"
-        android:backupAgent=".HabitsBackupAgent">
+        android:theme="@style/AppBaseTheme">
 
         <meta-data
             android:name="AA_DB_NAME"
@@ -59,7 +59,8 @@
                 android:value="org.isoron.uhabits.MainActivity"/>
         </activity>
 
-        <activity android:name=".IntroActivity"
+        <activity
+            android:name=".IntroActivity"
             android:label=""
             android:theme="@style/Theme.AppCompat.Light.NoActionBar"/>
 
@@ -72,6 +73,16 @@
                 android:resource="@xml/small_widget_info"/>
         </receiver>
 
+        <activity
+            android:name=".HabitWidgetConfigure"
+            android:theme="@style/Theme.AppCompat.Dialog">
+
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_CONFIGURE"/>
+            </intent-filter>
+
+        </activity>
+
     </application>
 
 </manifest>

app/src/main/java/org/isoron/uhabits/HabitWidgetConfigure.java

@@ -0,0 +1,91 @@
+/* Copyright (C) 2016 Alinson Santos Xavier
+ *
+ * This program 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.
+ *
+ * This program 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;
+
+import android.app.Activity;
+import android.appwidget.AppWidgetManager;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.os.Bundle;
+import android.preference.PreferenceManager;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.ArrayAdapter;
+import android.widget.ListView;
+
+import org.isoron.helpers.DialogHelper;
+import org.isoron.uhabits.models.Habit;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class HabitWidgetConfigure extends Activity implements AdapterView.OnItemClickListener
+{
+
+    private Integer widgetId;
+    private ListView listView;
+
+    private ArrayList<Long> habitIds;
+    private ArrayList<String> habitNames;
+    private ArrayAdapter<String> adapter;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState)
+    {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.widget_configure_activity);
+
+        Intent intent = getIntent();
+        Bundle extras = intent.getExtras();
+
+        if (extras != null) widgetId = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID,
+                AppWidgetManager.INVALID_APPWIDGET_ID);
+
+        listView = (ListView) findViewById(R.id.listView);
+
+        habitIds = new ArrayList<>();
+        habitNames = new ArrayList<>();
+
+        List<Habit> habits = Habit.getAll(false);
+        for(Habit h : habits)
+        {
+            habitIds.add(h.getId());
+            habitNames.add(h.name);
+        }
+
+        adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, habitNames);
+        listView.setAdapter(adapter);
+        listView.setOnItemClickListener(this);
+    }
+
+    @Override
+    public void onItemClick(AdapterView<?> parent, View view, int position, long id)
+    {
+        Long habitId = habitIds.get(position);
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(
+                getApplicationContext());
+        prefs.edit().putLong(SmallWidgetProvider.getWidgetPrefKey(widgetId), habitId).commit();
+
+        MainActivity.updateWidgets(this);
+
+        Intent resultValue = new Intent();
+        resultValue.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, widgetId);
+        setResult(RESULT_OK, resultValue);
+        finish();
+    }
+
+}

app/src/main/java/org/isoron/uhabits/SmallWidgetProvider.java

@@ -19,7 +19,9 @@ package org.isoron.uhabits;
 import android.appwidget.AppWidgetManager;
 import android.appwidget.AppWidgetProvider;
 import android.content.Context;
+import android.content.SharedPreferences;
 import android.graphics.Bitmap;
+import android.preference.PreferenceManager;
 import android.widget.RemoteViews;
 
 import org.isoron.uhabits.models.Habit;
@@ -27,6 +29,7 @@ import org.isoron.uhabits.views.SmallWidgetView;
 
 public class SmallWidgetProvider extends AppWidgetProvider
 {
+
     @Override
     public void onUpdate(Context context, AppWidgetManager manager, int[] appWidgetIds)
     {
@@ -37,8 +40,13 @@ public class SmallWidgetProvider extends AppWidgetProvider
     private void updateWidget(Context context, AppWidgetManager manager, int widgetId)
     {
         RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.small_widget);
+        Context appContext = context.getApplicationContext();
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(appContext);
 
-        Habit habit = Habit.get(1L);
+        Long habitId = prefs.getLong(getWidgetPrefKey(widgetId), -1L);
+        if(habitId < 0) return;
+
+        Habit habit = Habit.get(habitId);
 
         SmallWidgetView widgetView = new SmallWidgetView(context);
         widgetView.setDrawingCacheEnabled(true);
@@ -56,4 +64,18 @@ public class SmallWidgetProvider extends AppWidgetProvider
         manager.updateAppWidget(widgetId, remoteViews);
     }
 
+    public static String getWidgetPrefKey(long widgetId)
+    {
+        return String.format("widget-%03d", widgetId);
+    }
+
+    @Override
+    public void onDeleted(Context context, int[] appWidgetIds)
+    {
+        Context appContext = context.getApplicationContext();
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(appContext);
+
+        for(Integer id : appWidgetIds)
+            prefs.edit().remove(getWidgetPrefKey(id));
+    }
 }

app/src/main/res/layout/small_widget.xml

@@ -25,6 +25,6 @@
         android:textSize="12sp"
         android:maxLines="1"
         android:ellipsize="end"
-        android:text="Meditate"/>
+        android:text="@string/main_activity_title"/>
 
 </LinearLayout>

app/src/main/res/layout/widget_configure_activity.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ListView android:id="@+id/listView"
+          xmlns:android="http://schemas.android.com/apk/res/android"
+          android:layout_width="match_parent"
+          android:layout_height="match_parent"
+          android:orientation="vertical">
+
+</ListView>

app/src/main/res/xml/small_widget_info.xml

@@ -5,7 +5,8 @@
                     android:initialLayout="@layout/small_widget"
                     android:previewImage="@mipmap/ic_small_widget_preview"
                     android:resizeMode="none"
-                    android:updatePeriodMillis="60000"
+                    android:updatePeriodMillis="3600000"
+                    android:configure="org.isoron.uhabits.HabitWidgetConfigure"
                     android:widgetCategory="home_screen">