android:layout_gravity="@{rankingItemViewModel.marginLeftOrRight  ? Gravity.RIGHT : Gravity.LEFT}"

Any one can tell me why its not working?

It’s not a Kotlin related question

i dont use databinding, but shoudnt it be strings:

right

or

bottom

?

it depends on binding adapter

oh i get it, in that case they must generate code for the binding, which is like setting it programatically. the sample looks good tho. what is the error ?

I use databindings but never use gravity in bindings, not sure how this should work.

just inspect the generated code and check why it is not working

also looks like use viewmodel for changing gravity probably not the best idea, maybe theme would be better solution (you also can change theme with data bindings)

but he wants to change the gravity based on a business logic variable. how can he do it using themes ?

You can change theme using business logic %)

This is not Kotlin related. but i can tell more than likely you forgot to import android.view in your xml

you cannot change theme of an activity or widget. only at startup

<import type=“android.view.View”/>