title: i have a question a android programming for media play code
body: <p>When the media is already playing in the background and you want to play the media in another app, I want to stop the media that was playing and stop the media that was playing after receiving the signal from the existing app. In other words, I want to detect the signal to stop the existing media playback signal if there is another media playback signal.</p>
  
  <p>I think it might be related to android AUDIOFOCUS_REQUEST_GRANTED by calling android requestAudioFocus (), please help.</p>