android/testData/dom/layout/toolsSampleHighlighting.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ Copyright (C) 2017 The Android Open Source Project
  ~
  ~ Licensed under the Apache License, Version 2.0 (the "License");
  ~ you may not use this file except in compliance with the License.
  ~ You may obtain a copy of the License at
  ~
  ~      http://www.apache.org/licenses/LICENSE-2.0
  ~
  ~ Unless required by applicable law or agreed to in writing, software
  ~ distributed under the License is distributed on an "AS IS" BASIS,
  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  ~ See the License for the specific language governing permissions and
  ~ limitations under the License.
  -->
<FrameLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:android="http://schemas.android.com/apk/res/android">

    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:srcCompat="@tools:sample/avatars"/>

    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:srcCompat="@tools:sample/backgrounds/scenic[4]"/>

    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:srcCompat="<error>@tools:sample/avataaaars</error>"/>

</FrameLayout>