I took an android project from GitHub and cloned it to my Android Studio. When I am trying to run the ActivityMain.xml file in order to check if the project works correctly I'm getting this error "Cannot find the declaration of the element 'RelativeLayout'" . I dont know how to solve this. If anyone has any other way of running the project pls suggest that too.
The link of the github file is given below
所有布局文件应位于项目中的布局目录下
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