标识符必须具有XML文件中的用户定义类型，并带有observablefield的数据绑定

Question

I want my view visibility to be dependent on condition behaviour so I am using ObservableField and with databinding trying to change view visibility but getting issue like "Identifiers must have user defined types from the XML file. InputType is missing it"

Code:

Kotlin File

var showView: ObservableField<Boolean>? = ObservableField(false)

//API call response
showView.set(true)


Layout File:

<TextView
 android:id="@+id/textview"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:visibility="@{viewModel.showView ? View.VISIBLE : View.GONE}"/>

How to apply databinding with Observablefield of type boolean? I have used it for string text also and it's working but not working with boolean conditional statement.

Answer 1

I am not sure if that's the case here, but this error message is usually displayed when you reference a type in your binding expressions that hasn't been declared in the <data> section of your layout. The same way you declare the View type as an import, you should declare the type InputType .

<data>
    <!-- Maybe an import for InputType is missing here? -->
    <import type="android.view.View" />
    <variable
        name="viewModel"
        type="com.yourpackage.YourViewModel"/>
</data>