无法解析 XML - Kotlin

Question

Caused by: 
org.gradle.workers.internal.DefaultWorkerExecutor$WorkExecutionException: A
failure occurred while executing com.android.build.gradle.internal.res.ParseLibraryResourcesTask$ParseResourcesRunnable

Other error codes

FAILURE: Build completed with 2 failures.

1: Task failed with an exception.

• What went wrong: Execution failed for task ':app:parseDebugLocalResources'.

A failure occurred while executing com.android.build.gradle.internal.res.ParseLibraryResourcesTask$ParseResourcesRunnable Failed to parse XML file '/home/shinto/Documents/PostMethodTrialChecking/HelpIntern/app/build/intermediates/packaged_res/debug/layout/fragment_signup.xml'

fragment_signup.xml

<data>
    <variable
        name="users"
        type="com.shinto.helpintern.MainViewModel" />
</data>
android:visibilities="@{users.}"
<androidx.constraintlayout.widget.ConstraintLayout
    android:id="@+id/progBar"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

Answer 1

Your XML code is wrong. And as the error suggests, compiler expects a < , means an opening tag. Why?

Because this line android:visibilities="@{users.}" is misplaced and isn't in any tag. Even if it was in its correct position, it wouldn't work, because there's nothing called visibilities , it's visibility .

I assume you want to toggle the visibility of the ContraintLayout based on any (assuming boolean) value of the data. To do that, change your code as:

<data>
    <import type="android.view.View"/>
    <variable
        name="users"
        type="com.shinto.helpintern.MainViewModel" />
</data>

<androidx.constraintlayout.widget.ConstraintLayout
    android:id="@+id/progBar"
    android:visibility="@{users.yourValue? View.GONE : View.VISIBLE}"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

This will toggle the layout's visibility based on the value of your model.