Change Log

Version 2.0.0 (TBD)

New architecture distances Picasso further from the main thread using a dedicated dispatcher thread to manage requests.
Request merging. Two requests on the same key will be combined and the result will be delivered to both at the same time.
fetch() requests are now properly wired up to be used as "warm up the cache" type of requests without a target.
fit() will now automatically wait for the view to be measured before executing the request.
shutdown() API added. Clears the memory cache and stops all threads. Submitting new requests will cause a crash after shutdown() has been called.
Batch completed requests to the main thread to reduce main thread re-layout/draw calls.
Variable thread count depending on network connectivity. The faster the network the more threads and vice versa. Also handles airplane mode.
Ability to rewrite requests on the fly. This is useful if you want to add custom logic for wiring up requests differently.
Ability to specify a callback with ImageView requests.
Picasso will now decode the bounds of the target bitmap over the network. This helps avoid decoding 2000x2000 images meant for 100x100 views.

Auto-scale disk cache based on file system size.
placeholder now accepts null for clearing an existing image when used in an adapter and without an explicit placeholder image.
New global failure listener for reporting load errors to a remote analytics or crash service.
Fix: Ensure disk cache folder is created before initialization.
Fix: Only use the built-in disk cache on API 14+ (but you're all using OkHttp anyways, right?).

Initial release.