``` android:layout_gravity="@{rankingItemViewModel.marginLeftOrRight ? Gravity.RIGHT : Gravity.LEF...

# android

[changhyun]

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

Any one can tell me why its not working?

[gildor]

It’s not a Kotlin related question

[gildor]

I suppose this is a problem of binding adapter, you can write your own

[myanmarking]

i dont use databinding, but shoudnt it be strings:

right

or

bottom

?

[gildor]

it depends on binding adapter

[myanmarking]

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 ?

[gildor]

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

[gildor]

Error is that no bindingadapter with int setter

[gildor]

I would suggest just to write own adapter

[myanmarking]

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

[gildor]

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)

[myanmarking]

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

[gildor]

You can change theme using business logic %)

[rkeazor]

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

[myanmarking]

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

[myanmarking]

can you?

[myanmarking]

only way for widgets is via XML, or just passing a wrapped context with ur theme. I dont think u can change theme without restarting it

[rkeazor]

<import type=“android.view.View”/>

[rkeazor]

you should put this in your xml

[rkeazor]

inside the data tag

[rkeazor]

you can’t access Gravity.Left or Gravity.right without it