How to play music in the background through out the App continuously?

Question

I have 4 activities in my android app.When the first activity is created, it starts music in the background. Now when the user goes from 1st activity to the 2nd activity I want the song to continue without any interruption. The song should stop only when the user is out of the app.

Right now the music stops when I am going out of one activity and starts from the beginning in the next activity.

Answer 1

Keep the player in the background as a static reference. Then let it know if you are moving within the app or out of it. Here is how I would do it. I am using a class named DJ for this purpose.

public class DJ { 
private static MediaPlayer player;
private static boolean keepMusicOn;

public static void iAmIn(Context context){
if (player == null){
player = MediaPlayer.create(context, R.raw.music1);
player.setLooping(true);

try{
player.prepare();
}
catch (IllegalStateException e){}
catch (IOException e){}
}

if(!player.isPlaying()){
player.start();
}

keepMusicOn= false;
}

public static void keepMusicOn(){
keepMusicOn= true;
}

public static void iAmLeaving(){

if(!keepMusicOn){
player.pause();
}
}
}

Now from your Activity call the DJ like this.(Let him know if you would like to keep the music on)

public void onPause() {
super.onPause();
DJ.iAmLeaving();
}

public void onResume(){
super.onResume();
DJ.iAmIn(this); 
}

public void buttonOnClick(View view){
DJ.keepMusicOn();
Intent intent = new Intent(this, TheOtherActivity.class);
startActivity(intent);
}