Android Activity implementing CoroutineScope

android_activity.kt

class MainActivity: AppCompatActivity(), CoroutineScope {
    lateinit var job: Job

    override val coroutineContext: CoroutineContext
        get() = job + Dispatchers.Main

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        job = Job()
    }

    override fun onDestroy() {
        super.onDestroy()
        job.cancel() // all children coroutines gets destroyed automatically
    }
}