Apps Media Player blocks volume keys

[Titato]

I want to control my MediaPlayer volume with the hardware volume keys.
First I tried it with AudioManager but had no success and also read
it's not good to use AudioManager ("And DON'T use AudioManager to set volume!"
https://stackoverflow.com/questions/5215459/android-mediaplayer-setvolume-function?rq=1)
Instead I tried it like this: https://stackoverflow.com/questions/6742174/controlling-volume-in-mediaplayer
to set the volume directly.

My code:

[USER=1021285]@override[/USER]
public boolean onKeyDown(int keyCode, KeyEvent event) {
   //boolean result = true;
   if (keyCode == KeyEvent.KEYCODE_VOLUME_UP)
   {
      Log.d(TAG, "volume up"); //only reached if MediaPlayer/MediaRecorder are stopped
      volume = volume - 0.05f;
      if (volume < 0) {volume = 0f;}
      return true;
   }
   else if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN)
   {
      Log.d(TAG, "volume down"); //only reached if MediaPlayer/MediaRecorder are stopped
      volume = volume + 0.05f;
      if (volume > 1) {volume = 1f;}
      return true;
   }
return false;
}

private void playAudioFile(String filename) {
      block_another_play = true;
      player = new MediaPlayer();
      player.setVolume(volume, volume);
      ....
[USER=1021285]@override[/USER]
public void onPrepared(MediaPlayer player) {
   //MediaController
   controller.setMediaPlayer(this);
   player.start();

   controller.setEnabled(true);
   controller.show(0);

But my problem is: The onKeyDown events for hardware key up/down are only reached when MediaPlayer/MediaRecorder are stopped. But then I don't need them anymore.

So what can I do to access the KeyEvent.KEYCODE_VOLUME_UP/DOWN events
when the MediaPlayer/MediaRecorder are active?

 

[Titato]

return false; replaced with return super.onKeyDown(keyCode, event);
(https://stackoverflow.com/questions/974680/onkeydown-issue)
But no success with my main problem.