Question

by my understand about looper that it’s can be a central for running by any request pass through
handler in message and Service can do that too. So what is adventage of each(priority of thread,reliable,resource,…) to decided to use.Any suggestion?

Answer 1

Work with Handler i would say is basic approach, create Thread and implement Handler but if you work on more complex application, you should decide rather for AsyncTask, that is more complex, type safer, faster and offers more options. You can declare it like inner class or also separated class.

Services is more complicated, you should know that only one Service can be in memory at the time, only one instance, one copy of Service and also when more Activities are trying to connection to Service. Services are generally used when you have very long Tasks and you want to they keep running also when they are not connected with any Activity for example Music player, RSS, keep status on Chat etc. But this all not free so you have to care about CPU to prevent prematurely battery exhaustion for example.

If i recommend to you so first try to use AsyncTask and when for something it’s won’t suitable for you or you need something what i wrote above, get it with Service.

More about AsyncTask and have look at this tutorial