I have a GridView with your positions and I do case on the onCreate, So,
case position = 1 play audio1,
case position = 2 play audio2
The Activity:
public class HomeEnglishAnimalsActivity extends ActionBarActivity {
MediaPlayer player;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_home_english_animals);
    android.support.v7.app.ActionBar actionBar = getSupportActionBar();
    actionBar.setHomeButtonEnabled(true);
    actionBar.setDisplayHomeAsUpEnabled(true);
    GridView gridView = (GridView) findViewById(R.id.gridviewHomeEnglishAnimals);
    gridView.setAdapter(new AdapterHomeEnglishAnimalsActivity(this));
    gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        public void onItemClick(AdapterView<?> parent, View v,
                                int position, long id) {
            switch (position) {
                case 0:
                    if (player != null)
                    {
                        player.stop();
                        player.release();
                    }
                    player.create(HomeEnglishAnimalsActivity.this, R.raw.bee).setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
                        @Override
                        public void onPrepared(MediaPlayer mediaPlayer) {
                            mediaPlayer.start();
                        }
                    });
                    break;
Ok, the code works but when I click a few times, the sound stop show this errors:
06-16 23:52:42.976  23918-23918/br.gabrielrossetto.tap4learn E/ExtMediaPlayer-JNI? QCMediaPlayer could not be located....
06-16 23:52:42.976  23918-23918/br.gabrielrossetto.tap4learn E/MediaPlayer-JNI? QCMediaPlayer mediaplayer NOT present
06-16 23:52:42.986  23918-23918/br.gabrielrossetto.tap4learn E/MediaPlayer? Should have subtitle controller already set
06-16 23:52:42.996  23918-23918/br.gabrielrossetto.tap4learn E/MediaPlayer? error (-19, 0)
06-16 23:52:42.996  23918-23918/br.gabrielrossetto.tap4learn E/MediaPlayer? Error (-19,0)
Thanks for your help.
                        
try this
when you create MediaPlayer object and start player you need to release it when music Complete.