Enregistrer un son sous Android

Bonjour
La classe MediaRecorder permet de gérer les enregistrements audio et vidéo sous Android.

private MediaRecorder recorder;

public void StartRecording() {
Log.d("StartRecording", "On lance l'enregistrement");
recorder = new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);

recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setOutputFile(path_file);
try {
recorder.prepare();
} catch (IllegalStateException e) {
Log.e("StartRecording", "IllegalStateException " + e.getMessage());
e.printStackTrace();
} catch (IOException e) {
Log.e("StartRecording", "IOException " + e.getMessage());
e.printStackTrace();
}
recorder.start();
}

public void StopRecording() {
Log.e("StopRecording", "On stop l'enregistrement");
recorder.stop();
recorder.reset();
recorder.release();
}