packages/SystemUI/res/layout/auth_credential_pattern_view.xml

<!--
  ~ Copyright (C) 2019 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.
  -->

<com.android.systemui.biometrics.AuthCredentialPatternView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center_horizontal"
    android:elevation="@dimen/biometric_dialog_elevation">

    <Space
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_weight="1"/>

    <ImageView
        android:id="@+id/icon"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

    <TextView
        android:id="@+id/title"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        style="@style/TextAppearance.AuthCredential.Title"/>

    <TextView
        android:id="@+id/subtitle"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        style="@style/TextAppearance.AuthCredential.Subtitle"/>

    <TextView
        android:id="@+id/description"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        style="@style/TextAppearance.AuthCredential.Description"/>

    <Space
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_weight="1"/>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:gravity="center"
        android:paddingLeft="0dp"
        android:paddingRight="0dp"
        android:paddingTop="0dp"
        android:paddingBottom="16dp"
        android:clipToPadding="false">

        <FrameLayout
            android:layout_width="wrap_content"
            android:layout_height="0dp"
            android:layout_weight="1"
            style="@style/LockPatternContainerStyle">

            <com.android.internal.widget.LockPatternView
                android:id="@+id/lockPattern"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_gravity="center"
                style="@style/LockPatternStyleBiometricPrompt"/>

        </FrameLayout>

        <TextView
            android:id="@+id/error"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            style="@style/TextAppearance.AuthCredential.Error"/>

    </LinearLayout>

    <Space
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_weight="1"/>

</com.android.systemui.biometrics.AuthCredentialPatternView>