Einfachste Weg, verwenden Picasso in-Anzeige (Symbol)

Ich beantworte dir die Frage selbst, weil ich gefunden habe, eine anständige Weise, über Picasso und RemoteViews. Getestet und arbeiten mit Picasso 2.5.2 :

//Default stuff; making and showing notification
final Context context = getApplicationContext();
final NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
final Notification notification = new NotificationCompat.Builder(context)
        .setSmallIcon(R.mipmap.ic_launcher) //Needed for the notification to work/show!!
        .setContentTitle("Title of notification")
        .setContentText("This is the description of the notification")
        //Uncomment if you want to load a big picture
        //.setStyle(new NotificationCompat.BigPictureStyle())
        .build();
final int notifId = 1337;
notificationManager.notify(notifId, notification);

//Get RemoteView and id's needed
final RemoteViews contentView = notification.contentView;
final int iconId = android.R.id.icon;

//Uncomment for BigPictureStyle, Requires API 16!
//final RemoteViews bigContentView = notification.bigContentView;
//final int bigIconId = getResources().getIdentifier("android:id/big_picture", null, null);

//Use Picasso with RemoteViews to load image into a notification
Picasso.with(getApplicationContext()).load("http://i.stack.imgur.com/CE5lz.png").into(contentView, iconId, notifId, notification);

//Uncomment for BigPictureStyle
//Picasso.with(getApplicationContext()).load("http://i.stack.imgur.com/CE5lz.png").into(bigContentView, iconId, notifId, notification);
//Picasso.with(getApplicationContext()).load("http://i.stack.imgur.com/CE5lz.png").into(bigContentView, bigIconId, notifId, notification);

Schlage ich vor, ein einfachste Weg, zu integrieren, ein remote-Bild in Ihrer Mitteilung als großes Symbol mit Picasso.

//your notification builder
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
                .setSmallIcon(R.mipmap.ic_launcher)
                .setContentTitle(getString(R.string.app_name))
                .setContentText(message)
                .setAutoCancel(true)
                .setSound(defaultSoundUri)
                .setContentIntent(pendingIntent);

String picture = "http://i.stack.imgur.com/CE5lz.png"; 
Bitmap bmp = Picasso.with(getApplicationContext()).load(picture).get();

notificationBuilder.setLargeIcon(bmp);

NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(0, notificationBuilder.build());

Bild-code zum laden mit Picaso 2.5.2 startet in der Mitte dieser Methode,außer, dass das ganze Zeug ist simple notification-code, einfach kopieren und einfügen ,ersetzen Sie "Image: URL", die mit den tatsächlichen Bild-url.

            private Notification notification;
               public  void genrateNewsNotification(String title, final int id) {
                    try {
                        final Context context=GcmService.this;
                        final NotificationCompat.Builder mBuilder;
                        final NotificationManager notificationManager = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
                        notificationManager.cancel(id);
                        Intent notificationIntent = new Intent(context, YourActivity.class);

                        TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
                        stackBuilder.addParentStack(MainActivity.class);
                        stackBuilder.addNextIntent(notificationIntent);
                        final PendingIntent contentIntent =
                                stackBuilder.getPendingIntent(
                                        id,
                                        PendingIntent.FLAG_UPDATE_CURRENT
                                );
                        mBuilder = new NotificationCompat.Builder(context);
                        mBuilder.setContentTitle("Custom Notification");
                        mBuilder.setAutoCancel(true);
                        mBuilder.setPriority(Notification.PRIORITY_MAX);
                        int currentapiVersion = android.os.Build.VERSION.SDK_INT;
                        if (currentapiVersion >= Build.VERSION_CODES.LOLLIPOP) {
                            mBuilder.setSmallIcon(R.drawable.launch_lolipop);
                        } else {
                            mBuilder.setSmallIcon(R.drawable.launcher_icon);
                        }
                        mBuilder.setContentText(title);
                        mBuilder.setContentIntent(contentIntent);
                        notification= mBuilder.build();

        //image code starts from here 

                        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
                            try{
                                Picasso.with(context).load("image_url")
                                        .into(target);
                                notificationManager.notify(id, notification);
                            }
                            catch (Exception e){
            //notification without image in case of Exception
                                notificationManager.notify(id, notification);
                            }

                        }else{
                            notificationManager.notify(id, notification);
                        }

                    } catch (Exception e) {
                        e.printStackTrace();
                    }

                }



            **//main stuff goes here ,it is an inner class**

               private Target target = new Target() {
                    @Override
                    public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
                        if (bitmap != null) {
                            RemoteViews views;
                            views = new RemoteViews(getPackageName(), R.layout.custom_notification);
                            views.setTextViewText(R.id.title,  "Daily Notification");
                            views.setTextColor(R.id.title,getResources().getColor(R.color.black));
                            views.setImageViewBitmap(R.id.big_picture,  bitmap);
                            views.setImageViewBitmap(R.id.big_icon, BitmapFactory.decodeResource(getResources(), R.drawable.launcher_icon));

                            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
                                notification.bigContentView = views;
                            }
                        }
                    }

                    @Override
                    public void onBitmapFailed(Drawable errorDrawable) {
                        Log.i("errorDrawable","errorDrawable");
                    }

                    @Override
                    public void onPrepareLoad(Drawable placeHolderDrawable) {

                    }


                };