buttonClick = (Button) findViewById(R.id.btnBasicCamTakePic);
buttonClick.setOnClickListener(new OnClickListener() {
	public void onClick(View v) {
		preview.camera.takePicture(shutterCallback, rawCallback,jpegCallback);
	}
});

	ShutterCallback shutterCallback = new ShutterCallback() {
		public void onShutter() {
			Log.d(TAG, "onShutter'd");
		}
	};

	/** Handles data for raw picture */
	PictureCallback rawCallback = new PictureCallback() {
		public void onPictureTaken(byte[] data, Camera camera) {
			Log.d(TAG, "onPictureTaken - raw");
		}
	};

	/** Handles data for jpeg picture */
	PictureCallback jpegCallback = new PictureCallback() {
		public void onPictureTaken(byte[] data, Camera camera) {

			File myExternalFile = new File(BasicCam.this.getExternalFilesDir("/MyFileStorage/qrscans/"), fileName);
			myExternalFile.delete();
			myExternalFile.createNewFile();
			FileOutputStream output = new FileOutputStream(myExternalFile);
			output.write(data2);
			output.flush();
			output.close();
		}
	});