No Launcher Activity Found With .launcher In Manifest.xml Already Included?

I am trying to run a source code I've found online for android. When I run it, it gives me: No Launcher activity found! The launch will only sync the application package on the

Solution 1:

I think you need to define a launching activity. For example in my app

<activityandroid:name=".Main"android:label="@string/app_name"><intent-filter><actionandroid:name="android.intent.action.MAIN" /><categoryandroid:name="android.intent.category.LAUNCHER" /></intent-filter></activity>

I have defined which activity is started on app start.