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"Selectively Playing Tracks Whilst Game Is Active / Open" for GameDevAlgorithms.com
public class BaseActivity extends Activity {
@Override
protected void onResume() {
super.onResume();
MusicHelper.getInstance(this).setMovingInApp(false);
}
@Override
public void onPause() {
super.onPause();
if (!MusicHelper.getInstance(this).isMovingInApp()) {
MusicHelper.getInstance(this).stopMusic();
}
}
public void close(View v) {
MusicHelper.getInstance(this).setMovingInApp(true);
finish();
}
}
public class MusicHelper {
private static MusicHelper mhInstance = null;
private boolean movingInApp = false;
private int currentTrack = 0;
private Context context;
private static Intent musicService;
private boolean musicServiceIsStarted = false;
public MusicHelper(Context context) {
this.context = context;
}
public static MusicHelper getInstance(Context ctx) {
if (mhInstance == null) {
mhInstance = new MusicHelper(ctx.getApplicationContext());
}
return mhInstance;
}
public void playIfPossible(final int trackToPlay) {
new Thread(new Runnable() {
public void run() {
// If music should be playing, and it isn't, or is the wrong track, fix that!
if ((isIntroMusic(R.raw.time_passes) || Setting.getBoolean(Enums.Setting.Music)) &&
(trackToPlay != currentTrack || !musicServiceIsStarted)) {
musicService = new Intent(context.getApplicationContext(), MusicService.class)
.putExtra("songId", trackToPlay);
currentTrack = trackToPlay;
context.startService(musicService);
musicServiceIsStarted = true;
} else if (!Setting.getBoolean(Enums.Setting.Music) && musicServiceIsStarted) {
context.stopService(musicService);
musicServiceIsStarted = false;
}
}
}).start();
}
private boolean isIntroMusic(int track) {
return track == R.raw.time_passes;
}
public void stopMusic() {
if (musicServiceIsStarted) {
context.stopService(musicService);
musicServiceIsStarted = false;
}
}
public boolean isMovingInApp() {
return movingInApp;
}
public void setMovingInApp(boolean movingInApp) {
this.movingInApp = movingInApp;
}
public boolean isMusicServiceIsStarted() {
return musicServiceIsStarted;
}
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.IBinder;
public class MusicService extends Service {
private MediaPlayer player;
public IBinder onBind(Intent arg0) {
return null;
}
public int onStartCommand(Intent intent, int flags, int startId) {
AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
int volume = audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
int songId = intent.getIntExtra("songId", 0);
if (songId > 0) {
player = MediaPlayer.create(this, songId);
player.setLooping(true);
player.setVolume(volume, volume);
player.start();
}
return Service.START_NOT_STICKY;
}
@Override
public void onDestroy() {
player.stop();
player.release();
}
}
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