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Android and android Official Website
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Camera Photo callback

/**     * 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);    }

In this case, the ShutterCallback must be processed if there is a "click" sound during the photo.

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();            }        }    };

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