android – 如何从另一个应用程序的通知中获取图像？

在Notificationservice类中,在额外的Notification.EXTRA_SMall_ICON中提取图标ressource id并访问其他app包ressources以获取Drawable.

Notification.EXTRA_PICTURE包含通知中发送的大图像：

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
    }
}