Facile à utiliser Picasso dans la notification (icône)

Je vais répondre à la question moi-même car j'ai trouvé une manière décente, à l'aide de Picasso et RemoteViews. Testé et de travail avec 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);

Je suggère la manière la plus simple d'intégrer une distance de l'image à l'intérieur de votre notification de grande icône avec 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());

Chargement de l'Image de code à l'aide de Picaso 2.5.2 commence au moyen de cette méthode,outre le fait que toutes les choses est simple code de notification, il suffit de copier et coller ,remplacer "image_url" avec l'url de l'image actuelle.

            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) {
}
};