This snippet contains code on how to use a class that implementing runnable class to achieve threading in android

CustomRunnableOne.kt

class CustomRunnableOne : Runnable {

    override fun run() {
        try {
            val TAG_ONE = "one"
            for (i in 0 until 5) {
                Thread.sleep(500L)
                println(TAG_NARUTO.plus("--$i--").plus("Current Runnable-->$TAG_ONE"))
            }
        }catch (ex:InterruptedException){
            println(TAG_NARUTO.plus("--")
                .plus("Runnable named")
                .plus("--")
                .plus(CustomRunnableOne::class.java.name)
                .plus("--")
                .plus("is interrupted"))
        }
    }

}

CustomRunnableThree.kt

class CustomRunnableThree  : Runnable {

    override fun run() {
        try {
            val TAG_THREE = "three"
            for (i in 0 until 5) {
                Thread.sleep(500L)
                println(TAG_NARUTO.plus("--$i--").plus("Current Runnable-->$TAG_THREE"))
            }
        }catch (ex:InterruptedException){
            println(TAG_NARUTO.plus("--")
                .plus("Runnable named")
                .plus("--")
                .plus(CustomRunnableThree::class.java.name)
                .plus("--")
                .plus("is interrupted"))
        }
    }

}

CustomRunnableTwo.kt

class CustomRunnableTwo  : Runnable {

    override fun run() {
        try {
            val TAG_TWO = "two"
            for (i in 0 until 5) {
                Thread.sleep(500L)
                println(TAG_NARUTO.plus("--$i--").plus("Current Runnable-->$TAG_TWO"))
            }
        }catch (ex:InterruptedException){
            println(TAG_NARUTO.plus("--")
                .plus("Runnable named")
                .plus("--")
                .plus(CustomRunnableTwo::class.java.name)
                .plus("--")
                .plus("is interrupted"))
        }
    }

}

output.java

2022-09-17 23:09:37.553 20681-20816/com.droid.code I/System.out: Naruto--0--Current Runnable-->one
2022-09-17 23:09:38.055 20681-20816/com.droid.code I/System.out: Naruto--1--Current Runnable-->one
2022-09-17 23:09:38.072 20681-20817/com.droid.code I/System.out: Naruto--0--Current Runnable-->two
2022-09-17 23:09:38.558 20681-20816/com.droid.code I/System.out: Naruto--2--Current Runnable-->one
2022-09-17 23:09:38.573 20681-20817/com.droid.code I/System.out: Naruto--1--Current Runnable-->two
2022-09-17 23:09:38.766 20681-20818/com.droid.code I/System.out: Naruto--0--Current Runnable-->three
2022-09-17 23:09:39.060 20681-20816/com.droid.code I/System.out: Naruto--3--Current Runnable-->one
2022-09-17 23:09:39.075 20681-20817/com.droid.code I/System.out: Naruto--2--Current Runnable-->two
2022-09-17 23:09:39.268 20681-20818/com.droid.code I/System.out: Naruto--1--Current Runnable-->three
2022-09-17 23:09:39.548 20681-20816/com.droid.code I/System.out: Naruto--Runnable named--com.droid.code.runnable.workers.CustomRunnableOne--is interrupted
2022-09-17 23:09:39.548 20681-20818/com.droid.code I/System.out: Naruto--Runnable named--com.droid.code.runnable.workers.CustomRunnableThree--is interrupted
2022-09-17 23:09:39.550 20681-20817/com.droid.code I/System.out: Naruto--Runnable named--com.droid.code.runnable.workers.CustomRunnableTwo--is interrupted

RunnableActivity.kt

class RunnableActivity  : AppCompatActivity() {

    private lateinit var binding: ActivityRunnableBinding

    lateinit var  thread1 : Thread
    lateinit var  thread2 : Thread
    lateinit var  thread3 : Thread


    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = ActivityRunnableBinding.inflate(layoutInflater)
        setContentView(binding.root)


        binding.btnPublishOneId.setOnClickListener {
            val runnable = CustomRunnableOne()
            thread1 = Thread(runnable)
            thread1.name = CustomRunnableOne::javaClass.name
            thread1.start()
        }

        binding.btnPublishTwoId.setOnClickListener {
            val runnable = CustomRunnableTwo()
            thread2 = Thread(runnable)
            thread2.name = CustomRunnableTwo::javaClass.name
            thread2.start()
        }

        binding.btnPublishThreeId.setOnClickListener {
            val runnable = CustomRunnableThree()
            thread3 = Thread(runnable)
            thread3.name = CustomRunnableThree::javaClass.name
            thread3.start()
        }

        binding.btnStopThreadId.setOnClickListener {
            stopThreads()
        }

    }

    private fun stopThreads() {
        if(::thread1.isInitialized){
            thread1.interrupt()
        }
        if(::thread2.isInitialized){
            thread2.interrupt()
        }
        if(::thread3.isInitialized){
            thread3.interrupt()
        }
    }

}