android - myView.getHitRect() 返回相对于父对象的坐标。如何让他们与祖 parent 联系起来？

Question

我正在使用以下代码创建 View 的触摸委托(delegate)。问题是我想增加可点击区域的 View 位于非常狭窄的 LinearLayout 内部。所以下面的代码可以增加我的 View 的可点击区域，但仅限于我狭窄的 LinearLayout 范围内。我想传递给这个函数的不是父类而是 myView 的祖父类 (myView.getParent().getParent())。它是一个 RelativeLayout，它有更大的可点击区域空间。但随后 touchRect 将指向错误的位置，并且我的 TouchDelegate 的位置将不正确..

因为:delegate.getHitRect(touchRect);返回相对于 parent 的位置，而不是祖 parent (或 parent 的 parent )。

public static Runnable getTouchDelegateAction(final View delegate, final View parent, final int topPadding, final int bottomPadding, final int leftPadding,
        final int rightPadding) {
    return new Runnable() {
        @Override
        public void run() {

            // Construct a new Rectangle and let the Delegate set its values
            Rect touchRect = new Rect();
            delegate.getHitRect(touchRect);

            // Modify the dimensions of the Rectangle
            // Padding values below zero are replaced by zeros
            touchRect.top -= Math.max(0, topPadding);
            touchRect.bottom += Math.max(0, bottomPadding);
            touchRect.left -= Math.max(0, leftPadding);
            touchRect.right += Math.max(0, rightPadding);


            // Now we are going to construct the TouchDelegate
            TouchDelegate touchDelegate = new TouchDelegate(touchRect, delegate);

            // And set it on the parent
            parent.setTouchDelegate(touchDelegate);
        }
    };
}

有什么建议吗？

Answer 1

如果有人有类似的问题，那么这是我找到的解决方案。不同之处在于可以设置标志 bindToGrandparent，以便将委托(delegate)委托(delegate)给可点击 View 的祖 parent 。

public static Runnable getTouchDelegateAction(final View delegate, final boolean bindToGrandparent, final int topPadding,
        final int bottomPadding, final int leftPadding, final int rightPadding) {
    return new Runnable() {
        @Override
        public void run() {
            View parent = (View) delegate.getParent();
            View grandparent = (View) parent.getParent();

            // Construct a new Rectangle and let the Delegate set its values
            Rect touchRect = new Rect();
            delegate.getHitRect(touchRect);

            if (bindToGrandparent) {
                touchRect.top += parent.getTop();
                touchRect.left += parent.getLeft();
                touchRect.bottom += parent.getTop();
                touchRect.right += parent.getLeft();
            }

            // Modify the dimensions of the Rectangle
            // Padding values below zero are replaced by zeros
            touchRect.top -= Math.max(0, topPadding);
            touchRect.bottom += Math.max(0, bottomPadding);
            touchRect.left -= Math.max(0, leftPadding);
            touchRect.right += Math.max(0, rightPadding);

            // Now we are going to construct the TouchDelegate
            TouchDelegate touchDelegate = new TouchDelegate(touchRect, delegate);

            // And set it on the parent
            if (bindToGrandparent) {
                grandparent.setTouchDelegate(touchDelegate);
            } else {
                parent.setTouchDelegate(touchDelegate);
            }
        }
    };
}

应按如下方式使用:

grandparentView.post(FuncHelper.getTouchDelegateAction(ivFavorite, true, 30, 30, 30, 30));

将过程发布到 View 的祖 parent 是很重要的。

或:

parentView.post(FuncHelper.getTouchDelegateAction(ivFavorite, false, 30, 30, 30, 30));