Question

For example

<manifest>
    <activity android:label="MyActivity1" android:name=".MyClass">
    </activity>
    <activity android:label="MyActivity2" android:name=".MyClass">
    </activity>
</manifest>

Answer 1

Yes and no. When you prepend the Activity name with a ., it looks at the Manifest’s default package to get the whole class path, such as com.example.android.MyClass. Thus, if instead you have one .MyClass and another com.example.android.other.MyClass, then this should work.

<manifest>
  <package="com.example.android">
    <activity android:label="MyActivity1" android:name=".MyClass">
    </activity>
    <activity android:label="MyActivity2" android:name="com.example.android.other.MyClass">
    </activity>
</manifest>