SimpleDelay.kt

class MainActivity : AppCompatActivity() {

    val TAG = MainActivity::class.java.simpleName
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        val handler = Handler(Looper.getMainLooper())
        Log.d(TAG, "Before post delayed:${System.currentTimeMillis()}")
        handler.postDelayed(
            {
                Log.d(TAG, "In post delayed:${System.currentTimeMillis()}")
                methodCall()
            }, 5000
        )
    }

    private fun methodCall() {
        Log.d(TAG, "methodCall():${System.currentTimeMillis()}")
        AsyncTask(applicationContext).execute()

        val handler = Handler(Looper.getMainLooper())
        handler.postDelayed({
            Log.d(TAG, "ENTERED")
        }, 5000)
    }

    class AsyncTask(applicationContext: Context) : android.os.AsyncTask<Void, Void, Int>() {
        val TAG = AsyncTask::class.java.simpleName
        override fun doInBackground(vararg params: Void?): Int? {
            Log.d(TAG, "doInBackground()")
            return 1234
        }

        override fun onPostExecute(result: Int?) {
            Log.d(TAG, "onPostExecute() 1")
            super.onPostExecute(result)
            Log.d(TAG, "onPostExecute() 2")
        }

    }
}