Handler vs Thread

Question

I would like to know, once for all. I\'ve read in many places. When I want do some \'long time operations\' I should use a Handler.

But I don\'t get why? A

Answer 1

A Handler lets you communicate back with the UI thread from your background thread. This is because UI operations are forbidden from within background threads. Note that starting at version 1.5, the AsyncTask class makes it much easier to do so.

Answer 2

It can't just be about getting you back to the UI thread since runOnUiThread(Runnable) does that very nicely. I suspect this is more about making it easier for Android to manage threads and other resources that shouldn't live outside of an Activity's context, and that the "Activity has leaked..." exceptions tell you when that's happened.