android runnable difference

What is the different b/w running runnable inside handler new Handler().post(runnable) an开发者_运维知识库d running in Thread(runable) ?

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Handler is used for communication between and coordinating threads. By creating a Handler, you bind it to the current thread. If you post a runnable to that Handler, it will be executed in that same thread.

Thread is Java's way to spawn new user-level threads. The runnable you pass it will be executed in that thread.

The two concepts are not mutually exclusive. You can use Handler with custom Threads.