Android : สอบถามการใช้ Matrix กับ mappoint เพื่อ touch เอาค่าสี

OnTouchListener imgSourceOnTouchListener = new OnTouchListener() {

		@Override
		public boolean onTouch(View view, MotionEvent event) {
			ButtonGo.setBackgroundResource(R.drawable.bmnext);
			float eventX = event.getX();
			float eventY = event.getY();
			float[] eventXY = new float[] { eventX, eventY };

			Matrix invertMatrix = new Matrix();
			((ImageView) view).getImageMatrix().invert(invertMatrix);

			invertMatrix.mapPoints(eventXY);
                        int x = Integer.valueOf((int) eventXY[0]);
			int y = Integer.valueOf((int) eventXY[1]);