How i can change button marginEnd with LiveData and BindingAdapter?

Question

How i can change button marginEnd with LiveData and BindingAdapter? My LiveData in ViewModel: var marginRight = MutableLiveData(R.dimen.default_margin)

My dimen <dimen name="default_margin">141dp</dimen>

and my attribute: android:layout_marginEnd="@{viewmodel.marginRight}"

In this case i get

Cannot find a setter for <android.widget.Button android:layout_marginEnd> that accepts parameter type 'androidx.lifecycle.MutableLiveData<java.lang.Integer>'
If a binding adapter provides the setter, check that the adapter is annotated correctly and that the parameter type matches.

Answer 1

after searching the Internet, I realized that there is no setter for the margin. It helped me:

LiveData:

var marginRight = MutableLiveData(R.dimen.margin_right_default)

My BindingAdapter:

    @JvmStatic
    @BindingAdapter("app:marginRight")
    fun setMarginRight(view: View, marginResource: Int){
        val resources = view.context.resources
        val params = view.layoutParams as ViewGroup.MarginLayoutParams
        params.setMargins(0,0, resources.getDimension(marginResource).toInt(), 0)
        view.layoutParams = params
    }

and my attribute:

app:marginRight="@{viewmodel.marginRight}"