Finally, deleting .idea folder and all .iml files from the project, restarting Android Studio and rebuilding gradle did the trick. Autocomplete in XML support library is working again.
Probably checking out files from Version Control or copying all the source files in a new project would do the trick aswell.Finally, deleting .idea folder and all .iml
阅读背景：
AndroidStudio xml代码无提示且预览页面空白解决方案_MarkRZJ的博客
来源：互联网
分享到：
