frameworks/base/tests/SilkFX/res/layout/activity_background_blur.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ Copyright (C) 2022 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"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/background"
    android:layout_width="390dp"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:padding="15dp"
    android:orientation="vertical"
    tools:context=".materials.BackgroundBlurActivity">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center_horizontal"
        android:padding="10dp"
        android:textColor="#ffffffff"
        android:text="Hello blurry world!"/>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:textColor="#ffffffff"
            android:text="Background blur"/>

        <SeekBar
            android:id="@+id/set_background_blur"
            android:min="0"
            android:max="300"
            android:layout_width="160dp"
            android:layout_height="wrap_content"/>
        <TextView
            android:id="@+id/background_blur_radius"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="#ffffffff"
            android:ems="3"
            android:gravity="center"
            android:paddingLeft="10dp"
            android:paddingRight="10dp"
            android:text="TODO"/>
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:textColor="#ffffffff"
            android:text="Background alpha"/>

        <SeekBar
            android:id="@+id/set_background_alpha"
            android:min="0"
            android:max="100"
            android:layout_width="160dp"
            android:layout_height="wrap_content" />
        <TextView
            android:id="@+id/background_alpha"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="#ffffffff"
            android:ems="3"
            android:gravity="center"
            android:paddingLeft="10dp"
            android:paddingRight="10dp"
            android:text="TODO"/>
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:textColor="#ffffffff"
            android:text="Blur behind"/>

        <SeekBar
            android:id="@+id/set_blur_behind"
            android:min="0"
            android:max="300"
            android:layout_width="160dp"
            android:layout_height="wrap_content" />
        <TextView
            android:id="@+id/blur_behind_radius"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:textColor="#ffffffff"
            android:paddingLeft="10dp"
            android:paddingRight="10dp"
            android:ems="3"
            android:text="TODO"/>
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:textColor="#ffffffff"
            android:text="Dim amount"/>

        <SeekBar
            android:id="@+id/set_dim_amount"
            android:min="0"
            android:max="100"
            android:layout_width="160dp"
            android:layout_height="wrap_content" />
        <TextView
            android:id="@+id/dim_amount"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:textColor="#ffffffff"
            android:paddingLeft="10dp"
            android:paddingRight="10dp"
            android:ems="3"
            android:text="TODO"/>
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginTop="5dp"
        android:orientation="vertical"
        android:gravity="center">

        <Button
            android:id="@+id/toggle_blur_enabled"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Disable blur"
            android:onClick="toggleForceBlurDisabled"/>

        <Button
            android:id="@+id/toggle_battery_saving_mode"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="TODO"
            android:onClick="toggleBatterySavingMode"/>
    </LinearLayout>
    <requestFocus/>

</LinearLayout>