NotificationListenerService get Notification Icon?

问题

In a Service extending the new (SDK18, JB-4.3) NotificationListenerService, I'd like to get the Notification's status bar icon.

mStatusBarNotification.getNotification().icon returns the resource id of the status bar drawable, but that resource id is naturally not within my app's scope/resources. There's also mStatusBarNotification.getNotification().largeIcon (returning a Bitmap), but that's not set for all notifications and returns the "wrong" icon (the image in the expanded notification drawer).

回答1:

Use getPackageName() on StatusBarNotification to find out the app that posted the Notification. You can then use createPackageContext() to get a Context for that package, then use that Context to retrieve the image (e.g., via getResources()).

回答2:

This is the alternative workaround.

We can get drawable from sbn.getNotification().extras.getInt("android.icon") and then use customview to show this drawable in the notification.

This is how to get Drawable using android.icon value:

        RemoteViews contentView = new RemoteViews(context.getPackageName(), R.layout.custom_push_notification);
        contentView.setImageViewResource(R.id.image, R.mipmap.ic_launcher);
        contentView.setTextViewText(R.id.title, notificationModel.getTitle());
        contentView.setTextViewText(R.id.text, notificationModel.getBody());


        try {
               //now get the context of other app and then get drawable from resoures
                Drawable drawable1 = context.createPackageContext(notificationModel.getPackageNmae(), CONTEXT_IGNORE_SECURITY).getDrawable(notificationModel.getIcon());
                Bitmap bitmap = drawableToBitmap(drawable1);
                contentView.setImageViewBitmap(R.id.image, bitmap);
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }

My notificationModel is:

       notificationModel.setPackageNmae(sbn.getPackageName());
        notificationModel.setTitle(sbn.getNotification().extras.getString("android.title"));
        notificationModel.setBody(sbn.getNotification().extras.getString("android.text"));
        notificationModel.setIcon(sbn.getNotification().extras.getInt("android.icon"));
        notificationModel.setKey(sbn.getId());

来源：https://stackoverflow.com/questions/18044044/notificationlistenerservice-get-notification-icon