Android - Which thread are the fragments running on?

Question

Are fragments running on a separate thread than the activity they were created on?

So let's say I have a fragment that calls a web-service synchronously, does it also block my main activity while retrieving data from the server?

Answer 1

As stated here Android UI is not thread safe and so Fragments run in the same main thread as an Activity. As such it's better to move your web-service call into an AsyncTask ar else you are at risk of freezing application.