Use data binding to set View visibility

Question

Trying to set visibility of View using custom variable, but error occurs: Identifiers must have user defined types from the XML file. visible is missing it. Is it possible to set view visibility using data binding? Thanks.

<data>
    <variable
        name="sale"
        type="java.lang.Boolean"/>
</data>

<FrameLayout android:visibility="@{sale ? visible : gone}"/>

Answer 1

As stated in the Android Developer Guide, you need to do it like this:

<data>
    <import type="android.view.View"/>
    <variable
        name="sale"
        type="java.lang.Boolean"/>
</data>

<FrameLayout android:visibility="@{sale ? View.GONE : View.VISIBLE}"/>