How to get an image from another app's notification?

Question

I'm creating a notification management app and I want to get the contents of notifications which other apps show. currently I use codes like this :

statusBarNotification.getNotification().extras.getString(Notification.EXTRA_TITLE);

and this :

statusBarNotification.getNotification().extras.getString(Notification.EXTRA_TEXT);

to read the title and text of notifications. but after a few hours I couldn't find a way to get the image which comes along with the notification's text. for example a profile picture which is showed in Whatsapp's notification. I know it's not the Small or Large icons, I checked a few times.

So if anyone could help in any way, it would be much appreciated

Answer 1

I assume you use NotificationListenerService to listen to notification from other app.

In you NotificationService class, extract icon ressource id in extra Notification.EXTRA_SMALL_ICON and access the other app package ressources to get the Drawable.

Notification.EXTRA_PICTURE contains the large image sent in the notification :

public class NotificationService extends NotificationListenerService {

    Context context;

    @Override

    public void onCreate() {
        super.onCreate();
        context = getApplicationContext();

    }

    @Override
    public void onNotificationPosted(StatusBarNotification statusBarNotification) {

        // a notification is posted

        String pack = statusBarNotification.getPackageName();

        Bundle extras = statusBarNotification.getNotification().extras;

        int iconId = extras.getInt(Notification.EXTRA_SMALL_ICON);

        try {
            PackageManager manager = getPackageManager();
            Resources resources = manager.getResourcesForApplication(pack);

            Drawable icon = resources.getDrawable(iconId);

        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }

        if (extras.containsKey(Notification.EXTRA_PICTURE)) {
            // this bitmap contain the picture attachment
            Bitmap bmp = (Bitmap) extras.get(Notification.EXTRA_PICTURE);
        }

    }

    @Override

    public void onNotificationRemoved(StatusBarNotification statusBarNotification) {
        //call when notification is removed
    }
}