The primary task of the manifest is to inform the system about the app’s components. For example, a manifest file can declare an activity as follows:
<?xml version="1.0" encoding="utf-8"?> <manifest ... > <application android:icon="@drawable/app_icon.png" ... > <activity android:name="com.example.project.ExampleActivity" android:label="@string/example_label" ... > </activity> ... </application> </manifest>
android:icon attribute points to resources for an icon that identifies the app.
In the element, the
android:name attribute specifies the fully qualified class name of the Activity subclass and the android:label attribute specifies a string to use as the user-visible label for the activity.
You must declare all app components this way:
elements for activities
elements for services
elements for broadcast receivers
elements for content providers
Activities, services, and content providers that you include in your source but do not declare in the manifest are not visible to the system and, consequently, can never run. However, broadcast receivers can be either declared in the manifest or created dynamically in code (as
BroadcastReceiver objects) and registered with the system by calling
For more about how to structure the manifest file for your app, see The AndroidManifest.xml File documentation.