title: MediaPlayer: How to retrieve metadata with MediaMetadataRetriever?
body: <p>my MediaPlayer is working, but I need to retrieve the metadata e.g. stream title. I'm using this code for it:</p>
  
  <pre><code>public String getMeta(){
          meta = new MediaMetadataRetriever();
          meta.setDataSource("http://111.1111.1111.1111:1111");
          return meta.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ALBUM);
  </code></pre>
  
  <p>But I'm only getting a empty String from this. I also tried all constants for the meta. I'm not sure, but I think the problem is around the connection to the webstation. My MediaPlayer has a Listener e.g. mPlayer.setOnPreparedListener(new OnPreparedListener() {...}. But for the MediaMetadataRetriever does not exist one.</p>
  
  <p>Can someone help me? Thanks!</p>