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No system resource manager for module: app in android studio 3.1 The problem when it android studio android 3.1 I have unfortunately entered into the finish inbuild library files after, it shows download or refreshes if u already downloaded, I used download after that this error is coming.

that filename activity.xml

ajeethkumar sankarraj
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1 Answers1

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Let's try File > Sync project with Gradle . In my case, it works well.

추두연
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    Worked for me. Many Thanks. After that, I also had to add "Base" to the Style in "styles.xml": – iGeeks Jun 15 '18 at 12:10
  • This worked for me when dealing with different modules in the same app. The Gradle for each module sometimes needs a File>Sync project with Gradle. – Paixols Jan 16 '19 at 01:27