如何在ViewModel中获取自定义视图的“可观察”字段？

Question

大家好，我的ViewModel类中的自定义视图有可能获得Observable吗？

自定义视图是此处的国家/地区选择器：https://github.com/hbb20/CountryCodePickerProject

也许可以更好地实现从CustomView获取Observable的方法，请告诉我。

我的活动，ViewModel和布局如下：

class EmployeeViewModel : BaseViewModel() {

    val status = SingleLiveEvent<Status>()
    val email = ObservableField<String>()
    val phone = ObservableField<String>()

    fun buttonClicked() {

        if (!emailIsValid(email.get())){
            status.value = Status.EMPTY_EMAIL_FIELD
        }

        if (!phoneIsValid(phone.get())){
            status.value = Status.EMPTY_PHONE_FIELD
        }

        // here should be code to validate Country Code custom view
        // maybe something like this.
        if(phonePicker.getDefaultCountryCode() == WHATEVER){
           // 
        }

    }
}

XML布局

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    tools:context="com.example.EmployeeActivity">

    <data>
        <variable
            name="viewModel"
            type="com.example.EmployeeViewModel" />
    </data>


            <TextView
                android:id="@+id/email"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@={viewModel.email}" />

            <TextView
                android:id="@+id/phone"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@={viewModel.phone}" />

            <com.hbb20.CountryCodePicker
                android:id="@+id/phonePicker"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                app:ccp_showNameCode="false"
                app:ccp_showPhoneCode="false" />

            <Button
                android:id="@+id/button"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:onClick="@{() -> viewModel.buttonClicked()}"
                android:text="Validate Employee" />
</layout>

活动

class EmployeeActivity : BaseActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        val databinding = DataBindingUtil.setContentView<ActivityEmployeeBinding>(this, R.layout.activity_employee)
        databinding.viewModel = withViewModel {
            observe(status) { handleStatus(it) }
        }
        databinding.executePendingBindings()

    }

    private fun handleStatus(status: Status?) {
        when (status) {
            Status.EMPTY_EMAIL_FIELD -> Toast.makeText(activity, "Please enter your email name!", Toast.LENGTH_SHORT).show()
            Status.EMPTY_PHONE_FIELD -> Toast.makeText(activity, "Please enter your phone", Toast.LENGTH_SHORT).show()
            Status.EMPTY_INLAVID_PHONE_FIELD -> Toast.makeText(activity, "Please enter a valid phone", Toast.LENGTH_SHORT).show()
        }
    }
}

感谢您的回复。