This snippet contains code on how to use a class that extends thread class to achieve threading in android

CustomThreadOne.kt

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

CustomThreadThree.kt

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

CustomThreadTwo.kt

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

output.java

2022-09-17 21:57:39.072 19401-19893/com.droid.code I/System.out: Sasuke--0--com.droid.code.thread.workers.CustomThreadOne--one
2022-09-17 21:57:39.562 19401-19894/com.droid.code I/System.out: Sasuke--0--com.droid.code.thread.workers.CustomThreadTwo--two
2022-09-17 21:57:39.574 19401-19893/com.droid.code I/System.out: Sasuke--1--com.droid.code.thread.workers.CustomThreadOne--one
2022-09-17 21:57:40.064 19401-19894/com.droid.code I/System.out: Sasuke--1--com.droid.code.thread.workers.CustomThreadTwo--two
2022-09-17 21:57:40.076 19401-19893/com.droid.code I/System.out: Sasuke--2--com.droid.code.thread.workers.CustomThreadOne--one
2022-09-17 21:57:40.219 19401-19895/com.droid.code I/System.out: Sasuke--0--com.droid.code.thread.workers.CustomThreadThree--three
2022-09-17 21:57:40.566 19401-19894/com.droid.code I/System.out: Sasuke--2--com.droid.code.thread.workers.CustomThreadTwo--two
2022-09-17 21:57:40.578 19401-19893/com.droid.code I/System.out: Sasuke--Thread named--com.droid.code.thread.workers.CustomThreadOne--is interrupted
2022-09-17 21:57:40.578 19401-19895/com.droid.code I/System.out: Sasuke--Thread named--com.droid.code.thread.workers.CustomThreadThree--is interrupted
2022-09-17 21:57:40.579 19401-19894/com.droid.code I/System.out: Sasuke--Thread named--com.droid.code.thread.workers.CustomThreadTwo--is interrupted

ThreadActivity.kt

class ThreadActivity : AppCompatActivity() {

    private lateinit var binding: ActivityThreadBinding

    lateinit var threadOne : CustomThreadOne
    lateinit var threadTwo : CustomThreadTwo
    lateinit var threadThree : CustomThreadThree

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

        binding.btnPublishOneId.setOnClickListener {
            threadOne = CustomThreadOne()
            threadOne.name = CustomThreadOne::class.java.name;
            threadOne.start()
        }

        binding.btnPublishTwoId.setOnClickListener {
            threadTwo = CustomThreadTwo()
            threadTwo.name = CustomThreadTwo::class.java.name;
            threadTwo.start()
        }

        binding.btnPublishThreeId.setOnClickListener {
            threadThree = CustomThreadThree()
            threadThree.name = CustomThreadThree::class.java.name;
            threadThree.start()
        }

        binding.btnStopThreadId.setOnClickListener { stopThreads() }
    }

    private fun stopThreads() {
        if(::threadOne.isInitialized){
            threadOne.interrupt()
        }
        if(::threadTwo.isInitialized){
            threadTwo.interrupt()
        }
        if(::threadThree.isInitialized){
            threadThree.interrupt()
        }
    }
}