自定义视图中的双向数据绑定问题

Question

我正在尝试对具有自定义视图的自定义视图使用双向数据绑定。

这是我现在拥有的：

 @BindingAdapter("setValue")
fun setTextValue(comboField: ComboboxField, value: String?) {
    if (value != comboField.value.text.toString()) comboField.value.setText(value)
}

@InverseBindingAdapter(attribute = "setValue", event = "setValueAttrChanged")
fun getTextValue(comboField: ComboboxField): String? {
    return comboField.value.text.toString()
}

@InverseBindingMethods(InverseBindingMethod(type = ComboInputBinding::class, attribute = "c", event = "setValueAttrChanged"))
class ComboInputBinding {
    @BindingAdapter("setValueAttrChanged")
    fun setListener(comboField: ComboboxField, listener: InverseBindingListener) {
        comboField.value.addTextChangedListener(object : TextWatcher {
            override fun afterTextChanged(p0: Editable?) {
                listener.onChange()
            }

            override fun beforeTextChanged(p0: CharSequence?, p1: Int, p2: Int, p3: Int) {}
            override fun onTextChanged(p0: CharSequence?, p1: Int, p2: Int, p3: Int) {}
        })
    }
}

上课是我的自定义视图。

 <common.component.ComboboxField
                    android:id="@+id/orgaos"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    app:setValue="@={viewModel.mutableStringLiveData}"
                    app:hint="@string/emission_orgao" />

但是我得到了

java.lang.String callbackArg_0 = mBindingComponent.null.getTextValue(orgaos);

我想念什么吗？