Android：獲取視圖的x，y坐標

Question

我編寫了以下代碼以找出接觸點的坐標。

view.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {
                float val = view.getAlpha();
                float xVal = view.getX();
                float yVal = view.getY();
                String message = "Screen height: " + height + ", width: " + width + "\n" +
                        "Alpha Value: " + val + ", x Coordinate: " + xVal + ", y Coordinate: " + yVal;
                Toast.makeText(MainActivity.this, message, Toast.LENGTH_SHORT).show();
                return false;
            }

原來總是返回固定值，每個x坐標和y坐標為32.0。

Answer 1

下面的方法可以代替在onTouch()方法中分別通過view.getX()和view.getY()獲取x和y坐標。

float xVal = motionEvent.getX(); float yVal = motionEvent.getY();