android - UIView 的 convertRect/convertPoint 函数的 android 等价物是什么？

Question

UIView 具有以下内容:

- convertPoint:toView:
- convertPoint:fromView:
- convertRect:toView:
- convertRect:fromView:

Android 的等价物是什么？更一般地说，给定两个 View，如何在第一个 View 的坐标系中获取第二个 View 的矩形？

Answer 1

我认为 sdk 中没有等效项，但您似乎可以使用 getLocationOnScreen 轻松编写自己的实现:

public static Point convertPoint(Point fromPoint, View fromView, View toView){
    int[] fromCoord = new int[2];
    int[] toCoord = new int[2];
    fromView.getLocationOnScreen(fromCoord);
    toView.getLocationOnScreen(toCoord);

    Point toPoint = new Point(fromCoord[0] - toCoord[0] + fromPoint.x,
            fromCoord[1] - toCoord[1] + fromPoint.y);

    return toPoint;
}

---

public static Rect convertRect(Rect fromRect, View fromView, View toView){
    int[] fromCoord = new int[2];
    int[] toCoord = new int[2];
    fromView.getLocationOnScreen(fromCoord);
    toView.getLocationOnScreen(toCoord);

    int xShift = fromCoord[0] - toCoord[0];
    int yShift = fromCoord[1] - toCoord[1];

    Rect toRect = new Rect(fromRect.left + xShift, fromRect.top + yShift,
            fromRect.right + xShift, fromRect.bottom + yShift);

    return toRect;
}