title: Android mediaplayer mute
body: <pre><code>private MediaPlayer mp_file;
  </code></pre>
  
  <p>I have mediaPlayer to play mp3 files in my project, it works fine... </p>
  
  <pre><code>mp_file.release();
  mp_file = MediaPlayer.create(getApplicationContext(), R.raw.zh_02); 
  mp_file.start(); 
  </code></pre>
  
  <p>I want to create (to make it work) a button called <code>mute_on</code> and <code>mute_off</code>.... How can I do it? By clicking this button all mp3 files in project will mute_off...or mute_on</p>