Hello. I'm trying to use com.shopify.livedataktx.M...

# android

[melatonina]

Hello. I'm trying to use com.shopify.livedataktx.MutableLiveDataKtx to avoid the invasion of nullables and !! in kotlin code using ViewModel. How do you make a two-way binding with that kind of MutableLiveDataKtx?

[rkeazor]

probably the same way you use liveData

[rkeazor]

But its only nullable,because of platform type, dont see the big deal really

[melatonina]

@rkeazor it is a big deal: it introduces null everywhere.

[melatonina]

@rkeazor In order to perform a two-way binding with MutableLiveDataKtx I had to use a binding converter. This triggers a NPE at compile-time. https://gist.github.com/mel4tonin4/05451ba80aca392caf12f661cc71b431

[melatonina]

I have no idea of how to debug that. Do you see where the problem is?

[rkeazor]

Isnt MutableLiveDataKtx a child of LiveData

[rkeazor]

You shouldnt have to do that

[rkeazor]

Just when you bind it remember to bind the lifecycle owner as well

[rkeazor]

There is something werid about your inverse binding adapter. But before you do that ,Make MutableLivrDataKtx extend mutableLiveData. Not livedata. It should work out the box with 2 way data binding

[melatonina]

I'll look into that. I didn't write MutableLiveDataKtx. No idea why they subclassed LiveData

[melatonina]

MutableLiveDataKtx subclassed LiveDataKtx and makes the mutating methods public, just like MutableLiveData does with LiveData.

[rkeazor]

Does LiveDataKtx subclass livedata

[rkeazor]

I say just use MutableLiveData

[rkeazor]

It's not as big of deal as you think it is lol. The wrapper, isnt anything special

[melatonina]

Thanks, Robert.