Screen on/off detection

Question

here i am trying to determine whether the screen is on or not but it doesn't seems to be working when press power lock/unlock button. Application works with no error but the code in if-else doesnt seems to have effect. Edited now the code work(thanks Olgun) but the mediaplayer playback doesnt stops and every time on/off screen new mediaplayer objct is created(multiple playbacks ).

SCBroadcaster.java

    public class SCBroadcaster extends BroadcastReceiver {
    PowerManager pm;
    MediaPlayer mp;
    public static boolean wasScreenOn = true;

    @Override
    public void onReceive(Context arg0, Intent arg1) {
        // TODO Auto-generated method stub
        mp = MediaPlayer.create(arg0, R.raw.gale);
        if (arg1.getAction().equals(Intent.ACTION_SCREEN_ON)) {
                    mp.stop();
            mp.release();
            Toast.makeText(arg0, "oNONONO", Toast.LENGTH_LONG).show();

        } else if (arg1.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
            mp.start();
        }

    }

}

MainActivity.java

public class MainActivity extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_OFF);
    filter.addAction(Intent.ACTION_SCREEN_ON);
    BroadcastReceiver bre = new SCBroadcaster();
    registerReceiver(bre, filter);
}

protected void onPause() {
    super.onPause();
    if (SCBroadcaster.wasScreenOn) {
        System.out.println("SCREEN TURNED OFF");
    } else {

    }
}

protected void onResume() {
    super.onResume();
    if (!SCBroadcaster.wasScreenOn) {

    } else {

    }
}

}

Answer 1

The approach with the ACTION_SCREEN did not work for me. After some different solutions this code finally solved the problem for me:

/**
 * Is the screen of the device on.
 * @param context the context
 * @return true when (at least one) screen is on
 */
public boolean isScreenOn(Context context) {
    if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT_WATCH) {
        DisplayManager dm = (DisplayManager) context.getSystemService(Context.DISPLAY_SERVICE);
        boolean screenOn = false;
        for (Display display : dm.getDisplays()) {
            if (display.getState() != Display.STATE_OFF) {
                screenOn = true;
            }
        }
        return screenOn;
    } else {
        PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
        //noinspection deprecation
        return pm.isScreenOn();
    }
}

Answer 2

Intent.ACTION_SCREEN_OFF and ACTION_SCREEN_ON check out for above broadcasts registration. here you can find a good example.