gistfile1.java

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        float x = event.getX();
        float y = event.getY();

        switch (event.getAction()) {
        case MotionEvent.ACTION_DOWN:
            onTouchDown(x, y);
//            invalidate();
            break;
        case MotionEvent.ACTION_MOVE:
            onTouchMove(x, y);
//            invalidate();
            break;
        case MotionEvent.ACTION_UP:
            onTouchUp();
//            invalidate();
            break;
        }
        
        return true;
    }