title: AudioTrack Android playing sounds from raw folder
body: <p>Is it possible to play wav files with <code>AudioTrack</code> from the resources folder raw? It tried many ways to reference the raw files in my Android project, but I got a lot of exceptions.</p>
  
  <p>This is what I have now, but when I press the button, no sound plays.</p>
  
  <pre><code>public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      Button buttonPlayAudioTrack = (Button) findViewById(R.id.buttonPlayAudioTrack);
      buttonPlayAudioTrack.setOnClickListener(this);
  
      int minBufferSize = AudioTrack.getMinBufferSize(44100, AudioFormat.CHANNEL_CONFIGURATION_MONO, 
                          AudioFormat.ENCODING_PCM_16BIT);
  
      audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, 44100, AudioFormat.CHANNEL_CONFIGURATION_MONO, 
                       AudioFormat.ENCODING_PCM_16BIT, minBufferSize, AudioTrack.MODE_STREAM); 
  }
  public void onClick(View v) {
      // TODO Auto-generated method stub
      if(v.getId() == R.id.buttonPlayAudioTrack) 
          playSound();
  }
  
  private void playSound() {
      audioTrack.play();
      int i = 0;
      int bufferSize = 512;
      byte [] buffer = new byte[bufferSize];
      InputStream inputStream = getResources().openRawResource(R.raw.piano12);
      try {
          while((i = inputStream.read()) != -1)
              audioTrack.write(buffer, 0, i);
      } catch (IOException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
      }
      try {
          inputStream.close();
      } catch (IOException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
      }
  }
  </code></pre>