How to have Android Service communicate with Activity

Question

I\'m writing my first Android application and trying to get my head around communication between services and activities. I have a Service that will run in the background an

Answer 1

You may also use LiveData that works like an EventBus.

class MyService : LifecycleService() {
    companion object {
        val BUS = MutableLiveData()
    }

    override fun onStartCommand(intent: Intent, flags: Int, startId: Int): Int {
        super.onStartCommand(intent, flags, startId)

        val testItem : Object

        // expose your data
        if (BUS.hasActiveObservers()) {
            BUS.postValue(testItem)
        }

        return START_NOT_STICKY
    }
}

Then add an observer from your Activity.

MyService.BUS.observe(this, Observer {
    it?.let {
        // Do what you need to do here
    }
})

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