Android Picasso prefetching all images to disk

Question

I want to prefetch images using Picasso and save them all to disk upon opening the app (no lazy loading on the fly). To make sure the cache is big enough I am using the following code in my Application onCreate

ContextWrapper cw = new ContextWrapper(getApplicationContext());
// path to /data/data/yourapp/app_data/imageDir
File directory = cw.getDir("imageDir", Context.MODE_PRIVATE);

OkHttpClient client = new OkHttpClient.Builder()
        .cache(new Cache(directory, Integer.MAX_VALUE))
        .build();
OkHttp3Downloader okHttp3Downloader = new OkHttp3Downloader(client);
Picasso.Builder builder = new Picasso.Builder(this);
builder.downloader(okHttp3Downloader);
Picasso built = builder.build();
built.setIndicatorsEnabled(false);
built.setLoggingEnabled(false);
Picasso.setSingletonInstance(built);

So here I set my cache size to Integer.MAX_VALUE which should be big enough ;)

I use code similar to this line to prefetch the image: Picasso.with(context).load(url).fetch();.

Now when I kill my internet and mobile data, no images are loaded even though the my code is fetching items. Any ideas why?

Answer 1

In the end I created my own image manager that downloads and store images (still using picasso to download them).