How to fix the Android error “default activity not found”?
If you encounter the “default activity not found” error in your Android application, you can try the following solutions:
Check the AndroidManifest.xml file: Make sure that the default activity is correctly declared in the AndroidManifest.xml file of your Android project. Check for the following code snippet and ensure that its format is correct:
<activity android:name=".MainActivity"><intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
The `.MainActivity` in the code snippet above should be replaced with the default activity class name in your application.
Clearing the build cache and rebuilding: Sometimes, build cache can cause issues. Try clearing the build cache and rebuilding your Android application by using the following command:
./gradlew clean
Then rebuild and run the project again.
Check dependencies and SDK versions: Make sure all required dependencies and SDK versions in your project are correctly configured. Verify the `build.gradle` file and `app/build.gradle` file to ensure that dependencies and target SDK versions match your project requirements.
Check the project structure: If you are using multiple modules or libraries, make sure to correctly set up dependencies and associations between the modules. Ensure that the module where the default activity is located is properly referenced in the main project.
Clean and rebuild project: In Android Studio, try using the “Build” -> “Clean Project” and “Rebuild Project” options in the menu. This will clean and rebuild the entire project.
If none of the above methods have resolved the issue, please check the detailed error logs and stack traces for more clues.
