Kotlin 如何为 material.Slider 视图创建绑定适配器

我的目标是双向数据绑定material .从我的viewmodel滑动到可变LiveData的视图:

   <com.google.android.material.slider.Slider
        ...
        android:value="@={viewmodel.fps}"
        ...
    />

Of course, it's not working because there is no databinding adapter for Slider in androidx.databinding library

[databinding] Cannot find a getter for <com.google.android.material.slider.Slider android:value> that accepts parameter type <java.lang.Integer>. If a binding adapter provides the getter, check that the adapter is annotated correctly and that the parameter type matches.

但是，他们有一个SeekBar:/androidx/databinding/adapters/SeekBarBindingAdapter.java

据我所知，双向数据绑定应该只使用"progress"属性，而单向数据绑定需要两个属性:"onChanged"和"progress"

我try 将SeekBarBindingAdapter改编为Slider:

    @InverseBindingMethods({
            @InverseBindingMethod(type = Slider.class, attribute = "android:value"),
    })
    public class SliderBindingAdapter {
        @BindingAdapter("android:value")
        public static void setValue(Slider view, int value) {
            if (value != view.getValue()) {
                view.setValue(value);
            }
        }

@BindingAdapter(value = {"android:valueAttrChanged", "android:onValueChange"}, requireAll = false)
    public static void setOnSliderChangeListener(Slider view, final Slider.OnChangeListener valChanged, final InverseBindingListener attrChanged) {
        if (valChanged == null)
            view.addOnChangeListener(null);
        else
            view.addOnChangeListener((slider, value, fromUser) -> {
                if (valChanged != null)
                    valChanged.onValueChange(slider, value, fromUser);
            });


        if (attrChanged != null) {
            attrChanged.onChange();
        }
    }

    @Override
    public void onValueChange(@NonNull Slider slider, float value, boolean fromUser) {

    }

这不是建筑:

Could not find event android:valueAttrChanged on View type Slider

但是为什么它要查找value如果我只使用

android:value="@={viewmodel.fps}"

？

How do I find the right attribute to add to BindingAdapter, if I don't see valueAttrChanged in Slider class？