Comment jouer un son ?

Bonjour
Voici le code pour jouer un son sous Android:
MediaPlayer mp = new MediaPlayer();
try {
mp.setDataSource(m_Path_file);
} catch (IllegalArgumentException e) {
Log.e("setDataSource", "IllegalArgumentException " + e.getMessage());
e.printStackTrace();
} catch (IllegalStateException e) {
Log.e("setDataSource", "IllegalStateException " + e.getMessage());
e.printStackTrace();
} catch (IOException e) {
Log.e("setDataSource", "IOException " + e.getMessage());
e.printStackTrace();
}
try {
mp.prepare();
} catch (IllegalStateException e) {
Log.e("prepare", "IllegalStateException " + e.getMessage());
e.printStackTrace();
} catch (IOException e) {
Log.e("prepare", "IOException " + e.getMessage());
e.printStackTrace();
}
mp.start();
mp.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
btStart.setEnabled(true);
btStart.setImageResource(R.drawable.magneto_rec);
btPlay.setEnabled(true);
}
});