title: Play sound from array on Android
body: <p>Solved: I forgot the track.play(); at the end...</p>
  
  <p>I want to play a sound on my Android Smartphone (4.0.4 Api level 15).
  I tried to hear some random noise, but its not working:</p>
  
  <pre><code>public class Sound {
  
    private static int length = 22050 * 10; //10 seconds long
    private static byte[] data = new byte[length];
  
    static void fillRandom() {
      new Random().nextBytes(data); //Create some random noise to listen to.
    }
  
    static void play() {
  
      fillRandom();
  
      final int TEST_SR = 22050; //This is from an example I found online.
      final int TEST_CONF = AudioFormat.CHANNEL_OUT_MONO;
      final int TEST_FORMAT = AudioFormat.ENCODING_PCM_16BIT;
      final int TEST_MODE = AudioTrack.MODE_STATIC; //I need static mode.
      final int TEST_STREAM_TYPE = AudioManager.STREAM_ALARM;
      AudioTrack track = new AudioTrack(TEST_STREAM_TYPE, TEST_SR, TEST_CONF, TEST_FORMAT, length, TEST_MODE);
      track.write(data, 0, length);
    }
  }
  </code></pre>
  
  <p>I have played a little bit with the variabels, but could not get it to work.</p>