Error: Default Activity Not Found

Question

I upgraded IntelliJ Idea 12.0.4 to 12.10.

Now all the modules in my Android project give the error:

Error: Default Activity Not Found

I reverted to 12.0.4 and it works.

Any ideas ?? I think it might be related to some plugins not being installed cause the only other thing could have been a local config but I deleted the configuration folder to confirm and that didn't change anything.

Answer 1

Nothing above helped me. After some time I found that IDEA changed action names to uppercase. Like:

<intent-filter>
  <action android:name="ANDROID.INTENT.ACTION.MAIN"/>
  <category android:name="ANDROID.INTENT.CATEGORY.LAUNCHER"/>
</intent-filter>

After reverting to normal, IDEA recognizes default activity:

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

Answer 2

my experience: make sure that all your java file has been indentify,if IDEA not indentify your java file ,so he not able to understand what's "Activity" means

good luck :)

Answer 3

Android Manifest.xml set the starting activity like following

<intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>

Answer 4

in my case i refactored a member variable that was named "activity", i renamed it to "context" ... i found out that the refactor was made to the activity tags in manifest, and i found them context tags instead ... this is really stupid from Android Studio !!

Answer 5

I was facing similar issue recently. The issue was with activitymanifest xml file. please check if taglines are closed properly.

Answer 6

I've encountered the same issue. For some reasons, android Studio replaced all the android:name attributes in most of XML files, including the manifest, to android:subject which isn't recognized by Android Studio.

As you can see in the picture above the IDE doesn't recognize the android:subject attribute. As a result, it won't be able to read the lines which specify the MainActivty.

The solution is simply to change every android:subject to android:name and then Rebuild the project from Build menu -> Rebuild Project. You might encounter the same issue when rebuilding the project, so do the same as above.