LogoutDelegate.kt

interface LogoutDelegate {
    fun registerLogout(activity: AppCompatActivity)
}

class LogoutDelegateImpl: LogoutDelegate, DefaultLifecycleObserver {
    private lateinit var activity: AppCompatActivity

    override fun registerLogout(activity: AppCompatActivity) {
        this.activity = activity
        this.activity.lifecycle.addObserver(this)
    }

    private lateinit var logoutReceiver: BroadcastReceiver
    override fun onCreate(owner: LifecycleOwner) {
        logoutReceiver = LogoutReceiver()
        activity.registerReceiver(logoutReceiver, IntentFilter("ACTION_LOGOUT"))
        //unregister missing for keeping the sample code smaller!
    }

    inner class LogoutReceiver: BroadcastReceiver() {
        override fun onReceive(context: Context?, intent: Intent?) {
            activity.finish()
        }
    }
}