Release Notes

Volley 1.2.1

Separate CronetHttpStack into its own library, com.android.volley:volley-cronet (#412)
Added NonNull annotations to Volley#newRequestQueue (#413)

Ensure ImageListener#onResponse is always invoked (#209)
Stricter, more consistent enforcement of disk size limit in DiskBasedCache (#57)
Reduce cache churn from large entries
Allow specification of default image / error image bitmaps or drawables in NetworkImageView (#227, #243, #267)
Add RequestEventListener interface to monitor requests as they are executed (#238)
Fix StrictMode violation for disk I/O in Volley#newRequestQueue (#274)
Less verbose error logging for commonly-used invalid Expires headers (#282)
Ensure If-Modified-Since header is formatted correctly on all devices (#287)
Reinitialize DiskBasedCache if directory is deleted (#297)
Send request to network if parsing the cache entry fails (#321)
Add Nullable annotations (#325, #333)
Allow creation of custom input/output streams in HurlStack (#328)
Tolerate null header maps in HttpHeaderParser (#334)
Add opt-in retries of NoConnectionErrors (#332)
Include license in generated POM file (#377)
Use a consistent timebase when evaluating soft/hard TTLs (#391)
Experimental AsyncRequestQueue interface and Cronet-based implementation (details)

Fix incorrect tag in MarkerLog when Request#finish is called from a background thread (#115).
Additional fixes for IllegalArgumentExceptions and OutOfMemoryErrors in DiskBasedCache#readHeaderList (#127).
Exclude time spent waiting for an item on the request queue when measuring network time in NetworkDispatcher (#140).
Prevent spurious wakeups from prematurely finishing a RequestFuture (#162).
Fix StrictMode errors when using HurlStack (#138).
Improve error messaging and fail more loudly when making unsafe concurrent calls to ImageLoader (#132).
Add @Nullable annotations to nullable parameters (#185).
Prevent cache collisions between requests using the same URI but different methods (#154).
Prevent duplicated/conflicting HTTP headers when using HurlStack (#193).
Flesh out RetryPolicy's documentation (#80).
Re-raise interrupt flag when quitting dispatcher threads (#60).
Improve error message when a null key/value is returned by getParams or getPostParams (#201).

Apache HTTP is now an optional dependency (#2). See Migrating from Apache HTTP for details on how to avoid using it.
Fix OutOfMemoryErrors and NegativeArraySizeExceptions in DiskBasedCache (#12).
Fix memory leak in Request#mErrorListener (#15).
Support for multiple identical response headers (#21).
Fix potential NullPointerException in ImageRequest/JsonRequest/StringRequest (#64).
Fix soft TTL for duplicate in-flight requests (#73).
Fix case-sensitive header reads from cache (#76).
Fix memory leak of last finished request in CacheDispatcher/NetworkDispatcher (#114).

Initial release.