Android Interview Question Answer: Thread, Coroutines Explained

Continue your Android interview preparation with Part 4 of our series! Covering advanced concepts, best practices, and real-world Android development interview questions. Read Part 4 here link on Activity and Fragment.

Thread

What is Thread? how to create and run it.

A Thread is a lightweight process that allows running background operations without blocking the main UI thread.

There are two ways you can create and run the thread

1. Using the thread class
2. Using runnable interface

To create a thread we need to extend the class from the thread class

1. Using the thread class

class MyThread extends Thread {
    @Override
    public void run() {
        System.out.println("Thread is running...");
    }
}

fun main(){
// Start the thread
MyThread thread = new MyThread();
thread.start();
}

2. Using Runnable interface

As the thread implements the Runnable interface and has a constructor that can allow us to pass the Runnable implementation we can use that to create the thread.

class MyRunnable implements Runnable {
    @Override
    public void run() {
        System.out.println("Runnable thread is running...");
    }
}

// Start the thread
Thread thread = new Thread(new MyRunnable());
thread.start();