如何让媒体播放器继续播放相同的音轨，而不在Android中启动另一个音轨

Question

I have an action bar icon on the main activity where when you click on it plays a soundtrack and I can pause and play it properly. I call this code below when the action bar play icon is pressed:

private void play() {
    if (!mp.isPlaying()) {
        mp.start();//play sound
        play=true;
        mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
            @Override
            public void onCompletion(MediaPlayer arg0) {
                mp.seekTo(0);
            }
        });
    } else {
        mp.pause();
        play=false;
    }
}

onOptionsItemSelected code:

if (id == com.app.myapp.R.id.play) {
    play();
    invalidateOptionsMenu();
}

I have another activity that has a home button action icon where when I click it, it takes me back to the main activity and the sound track keeps playing but when I click the play icon again, it plays another instance of the same track which I don't want it to do. I'm use the following code to go back to the main activity:

if (id == com.app.myapp.R.id.homebutton) {
    Intent intent = new Intent(getApplicationContext(), MainActivity.class);
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    startActivity(intent);
    finish(); // Call once you redirect to another activity
}

What extra piece of code do I need to do what I want my app to do?

Any help would be greatly appreciated.

Jaffer

Answer 1

Every time you launch the main activity from sub activities your main activity is getting created. Since you are creating mediaPlayer instance in onCreate() function new media player instance is created causing two playbacks.

Modify how you launch the main activity like below.

if (id == com.app.twelveimams.R.id.homebutton) {
    Log.e("kiran", "clear top from introu");
    Intent intent = new Intent(getApplicationContext(), MainActivity.class);

    intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);

    startActivity(intent);
    finish(); // Call once you redirect to another activity