Android Instant App : Default Activity not found

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This seems to be manifest merging error. I'm trying to port existing code to instant app module. What I've tried is :

  1. Changed main app module to baseFeatureModule.
  2. Created a new module completeApp.
  3. Emptied completeAppModule's Manifest :

  4. added implementation project entry in completeAppModule

    implementation project (":udofy")

  5. Added these entries in base module :

    baseFeature true in android block

    application project (":fullModule") in dependencies

I've tried rebuilding/ invalidate cache and restart/ Restarting studio but no help. Can anybody help me out here?

Based from this thread, there is no sources tab in later versions of Android Studio. However, you can edit the build.gradle file instead. See this link. Also make sure that you have specified the default activity in your AndroidManisfest.xml file. Within your default activity's xml section, there should be these tags:

    <action android:name="android.intent.action.MAIN"/>
    <category android:name="android.intent.category.LAUNCHER"/>

Default Activity not found · Issue #18 · android/input-samples · GitHub, Since there is no activity defined in the manifest, getting error in Android studio. Error running app: Default Activity not found. Possible duplicate of Error: Default Activity Not Found – Martin Zeitler Dec 15 '18 at 21:11

The issue for me was that I was using crashlytics and another debug utility that do not play well with instant apps. This was causing the manifest merging to fail. When I removed Crashlytics and the other utility, the manifest for the APK was able to be successfully generated and Android Studio was able to find the default activity which was present in the base feature.

Default Activity Not Found, When I clicked on the edit configurations window there is and error that says '​Error- Default Activity Not Found.' Also whenever I try to run the app  how to set default activity in android studio. error running 'app': the activity must be exported or contain an intent-filter. default activity not found instant app. error running e

I figured out, that the Manifest merger failed with the Firebase plugin in the base module.

Option 1:

I fixed this by adding following to the base modules 'AndroidManifest.xml'.


Don't forget to replace mypackage.

Option 2:

Copy the whole <application ...>...</application> tag into app modules AndroidManifest.xml

Resolve Error Running 'Default Activity not found', in my Android project give the error: Error: Default Activity Not Found I Moreover my project was created with Instant App (base, feature,  Android Error: Default Activity Not Found - Duration: 3:15. Rohit Mane 34,302 views

Android Error: Default Activity Not Found, This seems to be manifest merging error. I'm trying to port existing code to instant app module. What I've tried is : Changed main app module to  You can't change the tag names! You should use <application android:name=".app"> and please follow the Java guidelines, where a class name should be CamelCase (not app, but App in your case). – shimatai Aug 4 '17 at 14:17

Error in Android Studio, Error: Default Activity not found. If you are trying to run an Android Application on a Device or Emulator and you get the above error message  The problem was not with the intent filter, but with activities that were deleted and still in the Manifest. All you have to do is delete those activities in the manifest. Posting to the forum is only allowed for members with active accounts.

Error: Default Activity Not Found, 8.01x - Lect 24 - Rolling Motion, Gyroscopes, VERY NON-INTUITIVE - Duration: 49:13. Lectures by Walter Lewin. They will make you ♥ Physics. Recommended for you

  • Your "Edit Configuration" could be missing something. Check out this…
  • Also, double check that you haven’t missed any important steps while converting your existing app to AIA-project. Refer to… or
  • I'm having this issue too. It's really weird because sometimes a fresh check out from the git repository will cause the app to build perfectly and then after a few changes android studio is no longer able to determine the default activity.
  • I had the same issue , Finally fixed it by following this solution
  • were you able to narrow this down any further? I'm seeing same issue that I think might also be related to crashlytics (though only happens for me in Android Studio)