由网友(絕版ァ愛戀♂)分享简介：当海拔设置 Popwindow 不显示阴影。这似乎从文档支持。我使用的5.0棒棒糖。 创建弹出如下所示： popupWindow =新PopupWindow（背景）;    popupWindow.setOutsideTouchable（真）;    popupWindow.setFocusable（真）;...当海拔设置

Popwindow 不显示阴影。这似乎从文档支持。我使用的5.0棒棒糖。

创建弹出如下所示：

  popupWindow =新PopupWindow（背景）;    popupWindow.setOutsideTouchable（真）;    popupWindow.setFocusable（真）;    popupWindow.setElevation（10）;    popupWindow.setContentView（rootView）;    popupWindow.showAtLocation（anchorView，Gravity.NO_GRAVITY，XPOS，yPos）; 

解决方案

作为的由Android开发回答。

  

如果膨胀的视图不具有背景集合，或在弹出  窗口本身不具有背景设定（或具有透明  背景），那么你不会得到一个阴影。

这是我的情况，似乎是你的，因为你不使用setBackgroundDrawable。

这为我工作

  popupWindow.setBackgroundDrawable（新ColorDrawable（Color.WHITE））; 

我已经打开了新的问题，这表明他们更新的文件（的 HTTPS：//$c$c.google.com/p/android/issues/detail ID = 174919 ）

Android Popwindow does not show shadows when the elevation is set. It appears to support it from the documentation. I am using 5.0 Lollipop.

Creating the popup as follows:

    popupWindow = new PopupWindow(context);
    popupWindow.setOutsideTouchable(true);
    popupWindow.setFocusable(true);
    popupWindow.setElevation(10);
    popupWindow.setContentView(rootView);
    popupWindow.showAtLocation(anchorView, Gravity.NO_GRAVITY, xPos, yPos);

解决方案

As answered by an Android developer.

If the inflated view doesn't have a background set, or the popup window itself doesn't have a background set (or has a transparent background) then you won't get a shadow.

which was my case and seems to be yours, since you are not using setBackgroundDrawable.

This worked for me

popupWindow.setBackgroundDrawable(new ColorDrawable(Color.WHITE));

I've opened a new issue suggesting that they update the documentation (https://code.google.com/p/android/issues/detail?id=174919)