private lateinit var firebaseAnalytics: FirebaseAnalytics

   override fun onCreate(savedInstanceState: Bundle?){
       super.onCreate(savedInstanceState)

       // firebase developer documentation
       // https: //firebase.google.com/docs/reference/android/com/google/firebase/analytics/package-summary

       firebaseAnalytics = FirebaseAnalytics.getInstance(this)

       // set user id
       firebaseAnalytics.setUserId(“test_user_id”)

       / video playback events /

       // video start
       val videoStartBundle = Bundle()
       videoStartBundle.putString(“video_event”,”start”)
       videoStartBundle.putString(“video_id”,”tt7984734″)
       videoStartBundle.putString(“video_title”,”The Lighthouse”)
       videoStartBundle.putInt(“video_position”,0)
       videoStartBundle.putInt(“video_duration”,6540)
       videoStartBundle.putDouble(“video_progress”,0.0)
       firebaseAnalytics.logEvent(“video_playback”, videoStartBundle)

       // video pause
       val videoPauseBundle = Bundle()
       videoPauseBundle.putString(“video_event”,”pause”)
       videoPauseBundle.putString(“video_id”,”tt7984734″)
       videoPauseBundle.putString(“video_title”,”The Lighthouse”)
       videoPauseBundle.putInt(“video_position”,654)
       videoPauseBundle.putInt(“video_duration”,6540)
       videoPauseBundle.putDouble(“video_progress”,10.0)
       firebaseAnalytics.logEvent(“video_playback”, videoPauseBundle)

       // video resume
       val videoResumeBundle = Bundle()
       videoResumeBundle.putString(“video_event”,”resume”)
       videoResumeBundle.putString(“video_id”,”tt7984734″)
       videoResumeBundle.putString(“video_title”,”The Lighthouse”)
       videoResumeBundle.putInt(“video_position”,654)
       videoResumeBundle.putInt(“video_duration”,6540)
       videoResumeBundle.putDouble(“video_progress”,10.0)
       firebaseAnalytics.logEvent(“video_playback”, videoResumeBundle)

       // video rewind
       val videoRewindBundle = Bundle()
       videoRewindBundle.putString(“video_event”,”rewind”)
       videoRewindBundle.putString(“video_id”,”tt7984734″)
       videoRewindBundle.putString(“video_title”,”The Lighthouse”)
       videoRewindBundle.putInt(“video_position”,327)
       videoRewindBundle.putInt(“video_duration”,6540)
       videoRewindBundle.putDouble(“video_progress”,5.0)
       firebaseAnalytics.logEvent(“video_playback”, videoRewindBundle)

       // video fast-forward
       val videoFastForwardBundle = Bundle()
       videoFastForwardBundle.putString(“video_event”,”fastforward”)
       videoFastForwardBundle.putString(“video_id”,”tt7984734″)
       videoFastForwardBundle.putString(“video_title”,”The Lighthouse”)
       videoFastForwardBundle.putInt(“video_position”,4905)
       videoFastForwardBundle.putInt(“video_duration”,6540)
       videoFastForwardBundle.putDouble(“video_progress”,75.0)
       firebaseAnalytics.logEvent(“video_playback”, videoFastForwardBundle)

       // video stop
       val videoStopBundle = Bundle()
       videoStopBundle.putString(“video_event”,”stop”)
       videoStopBundle.putString(“video_id”,”tt7984734″)
       videoStopBundle.putString(“video_title”,”The Lighthouse”)
       videoStopBundle.putInt(“video_position”,6000)
       videoStopBundle.putInt(“video_duration”,6540)
       videoStopBundle.putDouble(“video_progress”,91.74)
       firebaseAnalytics.logEvent(“video_playback”, videoStopBundle)

       // video skip
       val videoSkipBundle = Bundle()
       videoSkipBundle.putString(“video_event”,”skip”)
       videoSkipBundle.putString(“video_id”,”tt7984734″)
       videoSkipBundle.putString(“video_title”,”The Lighthouse”)
       videoSkipBundle.putInt(“video_position”,6000)
       videoSkipBundle.putInt(“video_duration”,6540)
       videoSkipBundle.putDouble(“video_progress”,91.74)
       firebaseAnalytics.logEvent(“video_playback”, videoSkipBundle)

       // video progress
       // send progress events at:
       // – first 30 seconds reached
       // – 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100% of video completion
       val videoProgressBundle = Bundle()
       videoProgressBundle.putString(“video_event”,”progress”)
       videoProgressBundle.putString(“video_id”,”tt7984734″)
       videoProgressBundle.putString(“video_title”,”The Lighthouse”)
       videoProgressBundle.putInt(“video_position”,654)
       videoProgressBundle.putInt(“video_duration”,6540)
       videoProgressBundle.putDouble(“video_progress”,10.0)
       firebaseAnalytics.logEvent(“video_playback”, videoProgressBundle)

       setContentView(R.layout.activity_main)
   }
}