Show app introduction; restore original launch icon

app/build.gradle

@@ -24,6 +24,7 @@ android {
 
 dependencies {
     compile 'com.android.support:support-v4:23.1.1'
+    compile 'com.github.paolorotolo:appintro:3.4.0'
     compile files('libs/ActiveAndroid.jar')
 }
 

app/src/main/AndroidManifest.xml

@@ -56,6 +56,10 @@
                 android:name="android.support.PARENT_ACTIVITY"
                 android:value="org.isoron.uhabits.MainActivity"/>
         </activity>
+
+        <activity android:name=".IntroActivity"
+                  android:label=""
+                  android:theme="@style/Theme.AppCompat.Light.NoActionBar" />
     </application>
 
 </manifest>

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

@@ -0,0 +1,51 @@
+package org.isoron.uhabits;
+
+import android.app.Activity;
+import android.graphics.Color;
+import android.os.Bundle;
+
+import com.github.paolorotolo.appintro.AppIntro2;
+import com.github.paolorotolo.appintro.AppIntroFragment;
+
+public class IntroActivity extends AppIntro2
+{
+    @Override
+    public void init(Bundle savedInstanceState)
+    {
+        showStatusBar(false);
+
+        addSlide(AppIntroFragment.newInstance("Welcome",
+                "Habits Tracker helps you create and mantain good habits.", R.drawable.tutorial_1,
+                Color.parseColor("#194673")));
+
+        addSlide(AppIntroFragment.newInstance("Create some new habits",
+                "Every day, after performing your habit, put a checkmark on the app.",
+                R.drawable.tutorial_2, Color.parseColor("#ffa726")));
+
+        addSlide(AppIntroFragment.newInstance("Keep doing it",
+                "Habits performed consistently for a long time will earn a full star.",
+                R.drawable.tutorial_3, Color.parseColor("#7cb342")));
+
+        addSlide(AppIntroFragment.newInstance("Track your progress",
+                "Detailed graphs show you how your habits improved over time.",
+                R.drawable.tutorial_4, Color.parseColor("#9575cd")));
+    }
+
+    @Override
+    public void onNextPressed()
+    {
+
+    }
+
+    @Override
+    public void onDonePressed()
+    {
+        finish();
+    }
+
+    @Override
+    public void onSlideChanged()
+    {
+
+    }
+}

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

@@ -1,6 +1,8 @@
 package org.isoron.uhabits;
 
+import android.content.Context;
 import android.content.Intent;
+import android.content.SharedPreferences;
 import android.net.Uri;
 import android.os.Bundle;
 import android.preference.PreferenceManager;
@@ -29,6 +31,24 @@ public class MainActivity extends ReplayableActivity
                 R.id.fragment1);
 
         ReminderHelper.createReminderAlarms(MainActivity.this);
+
+        showTutorial();
+    }
+
+    private void showTutorial()
+    {
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
+        Boolean firstRun = prefs.getBoolean("pref_first_run", true);
+
+        if(firstRun)
+        {
+            SharedPreferences.Editor editor = prefs.edit();
+            editor.putBoolean("pref_first_run", false);
+            editor.apply();
+
+            Intent intent = new Intent(this, IntroActivity.class);
+            this.startActivity(intent);
+        }
     }
 
     @Override

app/src/main/res/xml/preferences.xml

@@ -43,6 +43,18 @@
                 android:action="android.intent.action.VIEW"
                 android:data="https://github.com/iSoron/uhabits"/>
         </Preference>
+    </PreferenceCategory>
+
+    <PreferenceCategory
+        android:key="pref_key_misc"
+        android:title="Miscellaneous">
+
+
+        <Preference android:title="Replay app introduction">
+            <intent
+                android:targetClass="org.isoron.uhabits.IntroActivity"
+                android:targetPackage="org.isoron.uhabits"/>
+        </Preference>
 
     </PreferenceCategory>