Android: Are all activities in an Android app run in the same thread or separate threads of their own?

Question

I want to know if all activities in an Android app are run in same thread or separate threads of their own?

Answer 1

All activities of one application all run on the same "main" thread, also called "UI-thread". But you can change this behaviour by setting a process attribute in the actvity tag in the manifest file. See http://developer.android.com/guide/topics/manifest/activity-element.html#proc