How to implement my own disk cache with picasso library - Android?

Question

I'm using picasso library to load images for my app. But I don't how to implement my own disk (sdcard) caching with picasso library.

Coverley

Will it help if I recommend alternative to Picasso that I have worked with, is easy to setup and works both in memory and on disc and is highly configurable? – Gono

Picasso should already do disc caching for you. What does it not do that you need to accomplish with a custom disk cache? – Meat

@Bobbake4: I just want to cache the image in custom folder in sdcard. – Coverley

Picasso is using OkHttp for default and it caches. To customize cache size you can use this gist.github.com/fada21/10655652. – Neomineomycin

Answer 1

Picasso uses the HTTP client for disk caching and if one is already configured it will use that instead of installing its own.

For the built-in UrlConnection the docs for installing a cache are here: https://developer.android.com/reference/android/net/http/HttpResponseCache.html

If you are using OkHttp then you just call setCache: http://square.github.io/okhttp/2.x/okhttp/com/squareup/okhttp/OkHttpClient.html#setCache-com.squareup.okhttp.Cache-

Ehr

Hi, my pics are in the Picasso cache dir but the log says: Sending progress READING_FROM_CACHE Cache content not available or expired or disabled Any idea? Thanks in advance. – Moncada

Answer 2

@Dax, to save files in custom cache directory using OkHttp, I would code something like this -

OkHttpClient okHttpClient = new OkHttpClient();
File customCacheDirectory = new File(Environment.getExternalStorageDirectory().getAbsoluteFile() + "/MyCache");
okHttpClient.setCache(new Cache(customCacheDirectory, Integer.MAX_VALUE));
OkHttpDownloader okHttpDownloader = new OkHttpDownloader(okHttpClient);
Picasso picasso = new Picasso.Builder(mainActivity).downloader(okHttpDownloader).build();
picasso.load(imageURL).into(viewHolder.image);

Hope this helps.

Mccalla

seCache is not recognized ? – Condenser

@Condenser you're right, setCache() is no more supported. That snippet was from 2.x version, but in 3.x they've replaced the setters with builder pattern (See github.com/square/okhttp/blob/master/CHANGELOG.md). So in 3.x you can do something like OkHttpClient.newBuilder().cache(cache)... – Mccalla