tests/autofillservice/res/layout/view_attribute_test_activity.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.
-->

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:focusable="true"
    android:focusableInTouchMode="true"
    android:id="@+id/rootContainer">
    <EditText android:id="@+id/editTextNoHint"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <EditText android:id="@+id/editTextHintCustom"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:autofillHints="@string/new_password_label" />

    <EditText android:id="@+id/editTextPassword"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:autofillHints="password" />

    <EditText android:id="@+id/editTextPhoneName"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:autofillHints=" phone, username     " />

    <EditText android:id="@+id/editTextHintsFromArray"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:autofillHints="@array/cc_expiration_values" />

    <!-- Use px instead of dp to not have to deal with screen resolution -->
    <LinearLayout android:id="@+id/outerView"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:paddingTop="2px"
        android:paddingBottom="5px"
        android:paddingLeft="7px"
        android:paddingRight="3px"
        android:orientation="vertical"
        android:background="#F00"
        android:importantForAutofill="yes">
        <LinearLayout android:id="@+id/nestedView"
            android:layout_height="wrap_content"
            android:layout_width="wrap_content"
            android:paddingTop="11px"
            android:paddingBottom="17px"
            android:paddingLeft="19px"
            android:paddingRight="13px"
            android:orientation="vertical"
            android:background="#0F0"
            android:importantForAutofill="no">
            <LinearLayout android:id="@+id/doubleNestedView"
                android:layout_height="wrap_content"
                android:layout_width="wrap_content"
                android:paddingTop="23px"
                android:paddingBottom="31px"
                android:paddingLeft="37px"
                android:paddingRight="29px"
                android:orientation="vertical"
                android:background="#00F"
                android:importantForAutofill="yes">
                <EditText android:id="@+id/tripleNestedView"
                    android:layout_height="41px"
                    android:layout_width="43px"
                    android:background="#FF0"
                    android:importantForAutofill="yes" />
            </LinearLayout>

            <EditText android:id="@+id/secondDoubleNestedView"
                android:layout_height="47px"
                android:layout_width="53px"
                android:background="#F0F"
                android:importantForAutofill="yes" />
        </LinearLayout>
    </LinearLayout>
</LinearLayout>