What methods are usually used to implement multithreading in applications?

In Android, the following methods are commonly used to implement multithreading:

1. Thread — the basic class for creating and starting threads.

2. Handler and Looper — for processing messages and executing code in a specific thread (e.g., the main thread).

3. AsyncTask (deprecated) — simplified execution of background tasks with UI updates.

4. Executor and ThreadPoolExecutor — for managing thread pools and executing tasks.

5. RxJava — a library for reactive programming with convenient thread handling.

6. Kotlin Coroutines — a modern and convenient way of asynchronous programming, allowing you to write code that looks synchronous but runs in the background.

Example of creating and starting a thread:

Thread {
    // code executed in the background thread
    println("Running in a separate thread")
}.start()

Using Kotlin Coroutines:

GlobalScope.launch(Dispatchers.IO) {
    // background work
    val data = loadData()
    withContext(Dispatchers.Main) {
        // update UI
    }
}