Android - Picasso - Retry with a different network policy

Question

I'm using the following code to load an URL to an ImageView. It first tries to load from cache, and if it fails it tries to fetch it from internet:

Picasso.with(getActivity())
.load(imageUrl)
.networkPolicy(NetworkPolicy.OFFLINE)
.into(imageView, new Callback() {
    @Override
    public void onSuccess() {

    }

    @Override
    public void onError() {
        //Try again online if cache failed
        Picasso.with(getActivity())
                .load(imageUrl)
                .error(R.drawable.error_image)
                .into(imageView, new Callback() {
            @Override
            public void onSuccess() {

            }

            @Override
            public void onError() {
                Log.v("Picasso","Could not fetch image");
            }
        });
    }
});

It works just fine, but the problem is that is really cumbersome to write all this code every time I have to load an image, compared to the standard:

Picasso.with(getContext())
 .load(imageUrl)
 .into(imageView);

Is there a way to encapsulate this behaviour ? Does Picasso provide any way to help it?

Answer 1

@ianhanniballake comment was right, and this SO answer is misleading. To enable caching, you only have to add to your Application:

Picasso.Builder builder = new Picasso.Builder(this);
builder.downloader(new OkHttpDownloader(this, Integer.MAX_VALUE));
Picasso.setSingletonInstance(builder.build());

And then Picasso/OkHttp takes care of looking in the cache before it tries to load an image from internet.