android 9.0遇到 Popupwindow显示位置异常

//7.0以上popupwindow位置显示异常
if(Build.VERSION.SDK_INT >= 24) {
Rect rect = new Rect();
view.getGlobalVisibleRect(rect);
int h = view.getResources().getDisplayMetrics().heightPixels - rect.bottom;
popupWindow.setHeight(h);
}
popupWindow.showAsDropDown(view,0,5);

但是底部有空白，待处理…