How does the Looper object interact with execution threads?

The Looper object in Android connects a thread with a message queue (MessageQueue). Each thread can have its own Looper, responsible for handling messages and Runnable tasks within that thread.

How it works:

• When creating a thread, you can call Looper.prepare() to initialize the Looper and associate it with the current thread.
• Then, Looper.loop() is called, which starts an infinite loop processing messages from the queue.
• At this point, the thread begins to wait for and process messages and tasks arriving in the queue.

The main thread (UI thread) by default has a Looper that manages interface event processing.

Interaction example:

// Create a Looper in the thread
Looper.prepare()
val handler = Handler(Looper.myLooper()!!)
Looper.loop()

// Now the handler can receive and process messages in this thread

Thus, the Looper provides a message processing cycle in the thread, allowing asynchronous execution of tasks and event handling.