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android – Issue with ActionBarActivityDelegate class…..app doesn't run

Posted by: admin June 15, 2020 Leave a comment


Hello i hope someone can help me with his
I was planning to put an action bar in my test app, so I did exactly as said in the developers API guide.

But when i tried to compile it it throw this error (logcat):

at android.support.v7.app.ActionBarActivityDelegate.createDelegate()
at android.support.v7.app.ActionBarActivity.onCreate().....
Caused by: java.lang.NoClassDefFoundError: android.support.v7.appcompat.R$attr
at android.support.v7.app.ActionBarActivityDelegateBase.<clinit>

What happens is that the app is correctly installed into my phone but even before it shows any UI, it throws the error and closes.

I even tried with the most simple app (“hello world example”) and says the same thing
I tried it in both real phone and simulator, and same result

Any ideas how to fix that???? Seems that there is no definition for the class ActionBarActivityDelegateBase, but i cannot find any reference to that class in the guides or any other website

How to&Answers:

I had that error, and the problem was that I hadn’t added the lib with the resources.
You can’t just add the jars, because it will not add the resources. You have to create a project from thoses libs and then add the project as a library to your own project.

Here’s the instructions how to:

Go to this link and go to the “Adding libraries with resources” section


This fixed the problem for me.



I had the same issue about 20 minutes ago. I fixed it in the Manifest by changing the theme from “AppTheme” to “Theme.AppCompat”

    android:theme="@style/Theme.AppCompat" >


I’m using Android-Studio 1.0.2 and I had the same problem. I fixed the issue removing compile 'com.google.android.gms' from build.gradle. Not too sure about the cause of the problem.


I spent a whole day trying to fix this. I am using eclipse on debian. I ended up adding the library android-support-v7-appcompt and my app into one working set and built the “working set” to resolve the issue. This eventually created the necessary files in android-support-v7-appcompat/bin folder.