onBitmapLoaded never called

Question

I've got an issue with onBitmapLoaded . The method is not called when it should be (it is called the second time i enter my view). Nevertheless i keep a reference to my target since i add it to an arraylist .

I don't understand why it's not working. Does someone have an idea ?

public void loadBitmap() {

    if(loadtarget == null) {
        loadtarget = new Target(){

            @Override
            public void onPrepareLoad(Drawable arg0) {
                Log.d("Bitmap","On prepare load");
                targetList.remove(this);
                return;
            }

            @Override
            public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
                Log.d("Bitmap","OKAY for :" + filename);
                targetList.remove(this);
                handleLoadedBitmap(bitmap);
            }

            @Override
            public void onBitmapFailed(Drawable errorDrawable) {
                Log.d("Bitmap","Error for :" + filename);
            }
        };
    }
    targetList.add(loadtarget);
    Picasso.with(context).load(imageUrl).into(loadtarget);
}

Answer 1

If targetList and loadtarget are both local variables then they will be marked for GC collecting as soon as the method finishes. Make sure targetList is a class variable so that its outlives the method.

Answer 2

I've find some kind of trick to solve my problem.

By replacing : Picasso.with(context).load(imageUrl).into(targetList.get(i));

With :

Picasso.with(context).load(imageUrl).transform(new Transformation() {

            @Override
            public Bitmap transform(Bitmap source) {
                handleLoadedBitmap(source);
                return source;
            }
            @Override
            public String key() {
                return "";
            }
        }).into(imageView); // imageView is a fictive imageView allocated only for this operation

my code is working. I'm not sure that it's the best solution but it fixed my problem.