+1 I would like to set the content type.

I'm thinking about the best (cleanest) way to implement this, I will get back to you guys.

Any suggestions welcome of course! :)

@Simperium added "client-wide" header support in this commit, which could be useful for you guys:
Simperium@825f655

I'm planning of adding per-request custom headers since these are more flexible

+1.. I think the cleanest way to do it would be to build it into RequestParams

I agree with shnhrrsn. Wow. what a name ;-)

+1, client-wide or per-request. This would be really useful.

+1 - this feature is really important since i've to send json encoded body to server side.

@loopj any roadmaps for this feature?

+1 for this feature.

As of now, I see Header[] param array for all GET,POST,PUT,DELETE,HEAD requests, see AsyncHttpClient class. I consider this issue fixed, although I plan to move the feature to RequestParams as suggested.