设计选项卡中的Andr​​oid Studio的图形编辑器，并在右侧的preVIEW选项卡，丢失。我怎样才能使他们出现在哪里？

The "Design" tab in Android Studio's graphical editor, and the preview tab at right, are missing. How can I cause them to appear?

推荐答案

为了恢复选项卡，您需要关闭一个XML文件，其中包含布局编辑器中再次打开它。无需重新启动机器人工作室。这也许只是一个小错误。

In order to restore the tab, you need to close an xml file, which contains layout and reopen it again within editor. No need to restart android studio. It is, probably just a little bug.