Android 7.0及以上PopupWindow 适配问题

        //popupWindow 适配7.0及以上系统显示问题
        if (Build.VERSION.SDK_INT >= 24) {
            Rect rect = new Rect();
            mTabLayout.getGlobalVisibleRect(rect);
            int height = mTabLayout.getResources().getDisplayMetrics().heightPixels - rect.bottom;
            popupWindow.setHeight(height);
        }
        popupWindow.showAsDropDown(mTabLayout, 0, 0);