title: Disable button when there is no internet connection
body: <p>My code looks like this:</p>
  
  <pre><code>    mediaPlayer = new MediaPlayer();
      mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
  
      new PlayerTask().execute(stream);
  
      b_play.setOnClickListener(new View.OnClickListener() {
  
       @Override
       public void onClick(View view) {
           if (started) {
               started = false;
               mediaPlayer.pause();
               b_play.setText(R.string.start);
           } else {
               started = true;
               mediaPlayer.start();
               b_play.setText(R.string.pause);
  
           }
       }
  });
  </code></pre>
  
  <p>How can I disable b_play button when there is no internet connection?</p>