How to make a GET request in java/android to get a list of messages?

Question

Java

I rummaged through the Internet, re-read a lot of things, but only got more confused.
In general, there is a task.
For authentication, you must pass a header named Authorization, for example:
Authorization: Bearer 1a1a1a1a1a1a1a1a1a1a1a1a1a1
The API works in JSON format.
Host address: example.ru
1) Getting a list of messages:
Method: GET
URL: /api/mess
Question - how to make a GET request to get a list of messages? If possible, please provide an example.
Does the request need to be executed in an AsyncTask?

Answer 1

I figured it out, I did it using the library from the github, I had to write
Request request = new Request.Builder()
.url(url).addHeader("Authorization","Bearer 1a1a1a1a1a1a1a1a1a1a1a1a1a1")
.build();
and then made a request. All done in AsyncTask

Answer 2

stackoverflow.com/questions/2938502/sending-post-d...
stackoverflow.com/questions/10287368/adding-author...

Answer 3

retrofit in your case, when there is little data, you can use callbacks, directly from the main thread)) although if there is a lot of data and they still need to be processed, then it is better to use threads (AsyncTask, AsyncLoader, service ... as you prefer)