title: Handler post is not working in Kotlin Android
body: <p>Could someone show me what is wrong? </p>
  
  <p>I try to use a <code>Handler</code> post a <code>Runnable</code> but it's not execute </p>
  
  <pre><code>var mHandler: Handler? = null
  
  override fun onCreate(savedInstanceState: Bundle?) {
      super.onCreate(savedInstanceState)
      setContentView(R.layout.activity_main)
      mHandler = Handler()
      var runnable = Runnable {
          Log.d("TEST", "++++ runable")
          Log.d("TEST", "++++ come end")
      }
      Log.d("TEST", "++++ runnable" + runnable)
      Log.d("TEST", "++++ handle" + mHandler)
      mHandler!!.post { runnable }
  }
  </code></pre>
  
  <p>This is output</p>
  
  <blockquote>
    <p>09-21 00:56:04.067 4419-4419/? D/TEST: ++++
    runnablecom.vpioneer.activity.MainActivity$onCreate$runnable$1@529b8fb4
    09-21 00:56:04.067 4419-4419/? D/TEST: ++++ handleHandler
    (android.os.Handler) {529b8cb4}</p>
  </blockquote>