Android扩大View的点击范围

转载自：blog.youkuaiyun.com/csm_qz/article/details/50880847
View backView = findViewById(R.id.iv_back);
if (backView != null){
    ViewParent parent = backView.getParent();
    if (parent != null){
        Rect rect = new Rect();
        backView.getHitRect(rect);
        rect.top -= BACK_VIEW_EXPANSION;
        rect.left -= BACK_VIEW_EXPANSION;
        rect.right += BACK_VIEW_EXPANSION;
        rect.bottom += BACK_VIEW_EXPANSION;
        TouchDelegate touchDelegate = new TouchDelegate(rect,backView);
        ((View)parent).setTouchDelegate(touchDelegate);
    }
}