"Default Activity Not Found" on Android Studio upgrade
android, android-studio, intellij-idea
Solution
If you see that error occur after upgrading versions of IntelliJ IDEA or Android Studio, or after generating a new APK file, you may need to refresh the IDE's cache.
Menu File → Invalidate Caches and restart...
Problem
I upgraded IntelliJ IDEA from 12.0.4 to 12.10. Now all the modules in my Android project give the error: Error: Default Activity Not Found I reverted back to 12.0.4 and it everything works again. Any ideas? I think it might be an issue with a missing plugin. Since the plugin is not installed, it is not able to find the default activity. Another thing could have been a local configuration, but I doubt it. I deleted the configuration folder to verify and that didn't change anything.