Android -- Camera.ShutterCallback

/**
     * Equivalent to takePicture(shutter, raw, null, jpeg).
     *
     * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback)
     */
    public final void takePicture(ShutterCallback shutter, PictureCallback raw,
            PictureCallback jpeg) {
        takePicture(shutter, raw, null, jpeg);
    }

Camera.ShutterCallback shutterCallback = new Camera.ShutterCallback() {

        @Override
        public void onShutter() {
            try {
                AudioManager meng = (AudioManager) TakePhotoActivity.this.getSystemService(Context.AUDIO_SERVICE);
                int volume = meng.getStreamVolume(AudioManager.STREAM_NOTIFICATION);
                if (volume != 0) {
                    if (mShootSound == null) {
                        mShootSound = MediaPlayer.create(TakePhotoActivity.this, Uri.parse("file:///system/media/audio/ui/camera_click.ogg"));
                    }
                    if (mShootSound != null) {
                        mShootSound.start();
                    }
                }
            } catch (Exception e) {
                e.getStackTrace();
            }
        }
    };