Selgitage, mida tähendab Looper kontseptsioon rakenduste arendamise kontekstis.

In Android, a Looper is a component that manages the message cycle (Message Queue) within a thread. It allows the thread to process messages and tasks sequentially, which is especially important for the main (UI) thread to ensure interface responsiveness.

When a thread with a Looper is created, it starts a loop that continuously retrieves messages from the queue and processes them. This enables, for example, using a Handler to send and process messages within that thread.

Example of creating a Looper in a separate thread:

HandlerThread handlerThread = new HandlerThread("MyHandlerThread");
handlerThread.start();
Handler handler = new Handler(handlerThread.getLooper());

handler.post(() -> {
    // code to be executed in the thread with Looper
});

Thus, Looper provides a mechanism for message queueing and sequential processing within a single thread.