how do I convert `MutableLiveData` to `Observable` kotlinlang #android

What is the use case for this? Technically there is not a 100% accurate way to do this conversion since livedata sends its updates to lifecycleowners which observable is not. A lifecycle owner could update the observable based on the livedata changes as a sort of workaround to this but I can't think of a case where this would be needed.

iex

01/20/2020, 10:04 PM

someone configured validation inputs in view model as live data, e.g. email, name, password...

each has a live data, which is wired to the UI via data binding...

now I want to process / validate these inputs, but this is kinda business logic so I want to do it with rx

thus I need live data -> rx conversion

I guess I can change the live data inputs if needed to something else, not sure what

Andrew

01/20/2020, 10:12 PM

Here is a simple example on how validation is done with livedata. https://medium.com/swlh/basic-form-validation-in-android-with-live-data-and-data-binding-cb6b1d073717

iex

01/21/2020, 7:15 AM

medium... can't read, article limit 🙂

gsala

01/21/2020, 7:54 AM

I guess you have to use

LiveDataReactiveStreams

https://developer.android.com/reference/androidx/lifecycle/LiveDataReactiveStreams.html

aoriani

01/21/2020, 9:11 AM

@iex Just use incognito

iex

01/21/2020, 9:38 AM

@aoriani oh lol, I opened it in a different browser, thinking that it would react to the missing cookies but it didn't work? incognito works

thanks

ok, I checked it out, but I really would like to use rx and not live data to perform the validation. Have a bit more complex flow in mind and it becomes very unwieldy with live data

Christophe Smet

01/21/2020, 10:40 AM

The conversion between the two is not optimal. I had problems with livedata being subscribed for ever. You could subscribe to a livedata en then emit it in a publisher perhaps ? But that all sounds pretty bad

iex

01/21/2020, 3:36 PM

so should I just ditch live data for inputs?

and leave it for view model -> ui only?

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