How to implement a dispatcher that works in single-threaded mode?

In Android, to implement a dispatcher operating in a single-threaded mode, you can use the Handler class with a Looper attached to a single thread. Usually, this is the main (UI) thread, but you can also create your own thread with its own Looper.

Example of creating a single-threaded dispatcher:

// Create a thread with a Looper
val handlerThread = HandlerThread("MySingleThreadDispatcher")
handlerThread.start()

// Create a Handler associated with this thread
val handler = Handler(handlerThread.looper)

// Send tasks to be executed in a single-threaded mode
handler.post {
    // Code to be executed in this thread
}

Thus, all tasks sent through this handler will be executed sequentially in one thread, ensuring a single-threaded dispatcher.