If I have one application with activity, service, and contentprovider. Then when I run this program how many process, threads will be created? Is it possible to run these components in more than one process?

Answer: One process, one Thread, Yes it is possible to run in more than one process.

Description: Before loading an application into RAM, a process will be created with a thread by default. Even though in Linux, an application will be given only one process to run all its components, it is quite possible that components of a given application can run in more than one process provided both processes have same Linux user id.