Ouvrir l'objet caméra sous Android

Bonjour
Voici le code qui permet d'ouvrir l'objet caméra sous Android:
private boolean safeCameraOpen(int id) {
boolean qOpened = false;

try {
releaseCameraAndPreview();
mCamera = Camera.open(id);
qOpened = (mCamera != null);
} catch (Exception e) {
Log.e(getString(R.string.app_name), "failed to open Camera");
e.printStackTrace();
}

return qOpened;
}

private void releaseCameraAndPreview() {
mPreview.setCamera(null);
if (mCamera != null) {
mCamera.release();
mCamera = null;
}
}