如何获得与整个屏幕对应的屏幕坐标,而不是触摸的视图？

// Android 示例代码
@Override
public boolean onTouchEvent(MotionEvent event) {
    int[] location = new int[2];
    getLocationOnScreen(location);
    int x = (int) event.getX() + location[0];
    int y = (int) event.getY() + location[1];
    // 处理触摸事件
    return true;
}

// iOS 示例代码
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    let touch = touches.first!
    let location = touch.location(in: self.view)
    let screenLocation = touch.location(in: nil)
    // 处理触摸事件
}

// Web 开发示例代码
document.addEventListener('click', function(event) {
    var x = event.clientX + document.documentElement.scrollLeft;
    var y = event.clientY + document.documentElement.scrollTop;
    // 处理点击事件
});