android studio中xml文件代码提示问题
原帖地址：http://bbs.csdn.net/topics/391846404
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.
这是stackoverflow上大神的回复，就是删除.idea文件夹和所有的.iml文件，然后重启as，重新build project，经测试时有效果的。