1<!-- The main/home activity (it has no parent activity) -->
2 <activity
3 android:name="com.example.app_name.A" ...>
4 ...
5 </activity>
6 <!-- A child of the main activity -->
7 <activity
8 android:name=".B"
9 android:label="B"
10 android:parentActivityName="com.example.app_name.A" >
11 <!-- Parent activity meta-data to support 4.0 and lower -->
12 <meta-data
13 android:name="android.support.PARENT_ACTIVITY"
14 android:value="com.example.app_name.A" />
15 </activity>