Error Type 3: Activity Class Does Not Exist – How to Fix It

Error Type 3: Activity Class Does Not Exist - How to Fix It

22 May 2024 Stephan Petzl Leave a comment Tech-Help

Encountering the “Error Type 3: Activity Class does not exist” can be frustrating, especially when you’re eager to test your Android application. This error typically arises when there’s a misconfiguration or a caching issue in your development environment. Let’s walk through some effective solutions to resolve this problem.

Step-by-Step Solutions

  1. Clean and Rebuild Your Project
    • Go to Build > Clean Project.
    • Delete the Build directory manually.
    • Restart Android Studio.
    • Rebuild your project by navigating to Build > Rebuild Project.
    • Run your application again.

    If the issue persists, proceed to the next steps.

  2. Invalidate Caches and Restart
    • Navigate to File > Invalidate Caches / Restart.
    • Uninstall the app on your device or emulator.
    • Try running your application again.
  3. Delete Gradle Cache
    • Close Android Studio.
    • Navigate to your .gradle directory (usually located in your user home directory).
    • Delete the caches folder.
    • Restart Android Studio and rebuild your project.
  4. Uninstall the App for All Users
    • Go to your device’s Settings > Apps.
    • Select your app.
    • From the overflow menu, select Uninstall for all users.
    • Run your application again.
  5. Use Gradle to Uninstall
    • Open the terminal in Android Studio.
    • Run the command: ./gradlew uninstallAll.
    • Reinstall and run your application.
  6. Check Your AndroidManifest.xml
    • Ensure the activity name is correctly specified.
    • Example: <activity android:name=".LandingActivity" /> or <activity android:name="com.trackingeng.LandingActivity" />.
  7. Disable Instant Run
    • Go to Preferences > Build, Execution, Deployment > Instant Run.
    • Uncheck the Enable Instant Run option.
    • Rebuild and run your application.


By following these steps, you should be able to resolve the “Error Type 3: Activity Class does not exist” issue and continue developing your Android application without hindrance. Each solution addresses different potential causes, ensuring a comprehensive approach to troubleshooting.

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While resolving issues like the “Error Type 3” error is crucial, maintaining a smooth development workflow is equally important. This is where Repeato can be a game-changer. Repeato is a no-code test automation tool for iOS and Android, leveraging computer vision and AI to create, run, and maintain automated tests efficiently. This allows developers to focus on building great products, while non-technical colleagues or QAs can handle test automation seamlessly.

For more information on how Repeato can streamline your testing process, visit our documentation or check out our latest blog post.

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