Request to access notifications

Starting with Android 4.3, developers can access notifications, Let's write an example:

public class NotifyListenerService extends NotificationListenerService {

    @Override
    public void onNotificationPosted(StatusBarNotification sbn) {
    }

    @Override
    public void onNotificationRemoved(StatusBarNotification sbn) {
    }
}

The essence of NotificationListenerService is Service, so we need to register it in the manifest.xml and declare the permission:

<service
    android:name=".NotifyListenerService"
    android:permission="android.permission.BIND_NOTIFICATION_LISTENER_SERVICE">
        <intent-filter>
            <action android:name="android.service.notification.NotificationListenerService"/>
        </intent-filter>
</service>

Temporarily abandoning the permissions does not care, the above code can access the notification. However, since the access notification permission is turned off by default, we need the user to manually open the permission.

Request access notification permission

We should check if the app has permission to access notifications at the right time, if not, the user should be directed to open the permission to access notifications for our app:

AndPermission.with(this)
    .notification()
    .listener()
    .rationale(new Rationale<Void>() {
        @Override
        public void showRationale(Context c, Void d, RequestExecutor e) {
            // Startup settings: e.execute();
            // Cancel: e.cancel();
        }
    })
    .onGranted(new Action<Void>() {
        @Override
        public void onAction(Void data) {
            // App can access notifications.
        }
    })
    .onDenied(new Action<Void>() {
        @Override
        public void onAction(Void data) {
            // App cann't access notifications.
        }
    })
    .start();

When showRationale() is called back without the Access Notifications permission, the developer must call RequestExecutor#execute() to initiate the setting or RequestExecutor#cancel() to cancel the startup setting, ortherwise AndPermission will have no response.

When showRationale() is called back it is a good idea to display a Dialog to solicit the user's comments, whether to launch the setup page authorization Access Notifications permissions, call RequestExecutor#execute() or RequestExecutor#cancel() depending on the user's choice.