Android Studio Error running 'app': Default Activity not found

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I am using Android Studio 3.4.2 on macOS 10.14.5. Every time I try to run my app, I get the following error:

Error running 'app': Default Activity not found

I tried this solution already (Error: Default Activity Not Found) but it anyway did not fix anything for me.

Any help?

answered question
Harish Rawal

Have you added ACTION_MAIN intent filter.

Sagar Poshiya

Try After Clean Project, Build > Clean Project


huh? be explanatory pls.

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1 Answer


Maybe you forget to declare Your Activity in Manifest

   <activity android:name="your.package.YourDefaultActivity">
                <action android:name="android.intent.action.MAIN"/>

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

Try to add this into your manifest,

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