震惊 Android7.0居然出现这样的bug（popupwindow展示充满屏幕，而不是在view下方 ）

我的一个页面中用到了popupwindow，之前都没问题的，测试跑来说android7.0不对了，把原来的button挡住了（点击button弹出popupwindow）

重写showAsDropDown(view)就解决了。

public class SupportPopupWindow extends PopupWindow {

    public SupportPopupWindow(View contentView, int width, int height){
        super(contentView,width,height);
    }

    @Override
    public void showAsDropDown(View anchor) {
        if(Build.VERSION.SDK_INT == 24) {
            Rect rect = new Rect();
            anchor.getGlobalVisibleRect(rect);
            int h = anchor.getResources().getDisplayMetrics().heightPixels - rect.bottom;
            setHeight(h);
        }
        super.showAsDropDown(anchor);
    }

    @Override
    public void showAsDropDown(View anchor, int xoff, int yoff) {
        if(Build.VERSION.SDK_INT == 24) {
            Rect rect = new Rect();
            anchor.getGlobalVisibleRect(rect);
            int h = anchor.getResources().getDisplayMetrics().heightPixels - rect.bottom;
            setHeight(h);
        }
        super.showAsDropDown(anchor, xoff, yoff);
    }
}