Observe LiveData from JobService

Question

I have a repository which holds the LiveData object and is used by both Activity and now it's needed in JobService (From Firebase dispatcher) through a ViewModel.

There is answer for plain Service over here: Observe LiveData from foreground service

But it doesn't mention how to do the same for JobService.

Try to play with creating custom lifecycle component https://developer.android.com/topic/libraries/architecture/lifecycle.html#implementing-lco . To start working LifecycleRegistry properly, you should call https://developer.android.com/reference/android/arch/lifecycle/LifecycleRegistry.html#handleLifecycleEvent(android.arch.lifecycle.Lifecycle.Event) method in proper order. — Sergei Vasilenko, Aug 29 '17 at 08:29

score 12 · Answer 1 · answered Mar 12 '18 at 23:41

12

If you want to observe a LiveData object from something that isn't a LifecycleOwner, you can use the observeForever method.

val data = getLiveDataFromSomewhere()
data.observeForever(object: Observer<Whatever> {
    override fun onChanged(stuff: Whatever?) {
        // do something with stuff
        data.removeObserver(this)
    }
})

answered Mar 12 '18 at 23:41

alekop

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I got an exception that stated `Cannot invoke observeForever on a background thread` and used [this](https://stackoverflow.com/a/58131708/4232765) answer as a solution. – Daniel Sep 22 '20 at 10:26

Observe LiveData from JobService

1 Answers1