res/layout/media_session_view.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ Copyright (C) 2021 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.
  -->

<!-- Layout for media session-based controls -->
<com.android.systemui.util.animation.TransitionLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/qs_media_controls"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:clipChildren="true"
    android:clipToPadding="true"
    android:gravity="center_horizontal|fill_vertical"
    android:forceHasOverlappingRendering="false"
    android:background="@drawable/qs_media_outline_layout_bg"
    android:clipToOutline="true"
    android:theme="@style/MediaPlayer">

    <ImageView
        android:id="@+id/album_art"
        android:layout_width="match_parent"
        android:layout_height="@dimen/qs_media_session_height_expanded"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        android:translationZ="0dp"
        android:scaleType="centerCrop"
        android:adjustViewBounds="true"
        android:clipToOutline="true"
        android:background="@drawable/qs_media_outline_album_bg"
        />

    <com.android.systemui.surfaceeffects.ripple.MultiRippleView
        android:id="@+id/touch_ripple_view"
        android:layout_width="match_parent"
        android:layout_height="@dimen/qs_media_session_height_expanded"
        app:layout_constraintStart_toStartOf="@id/album_art"
        app:layout_constraintEnd_toEndOf="@id/album_art"
        app:layout_constraintTop_toTopOf="@id/album_art"
        app:layout_constraintBottom_toBottomOf="@id/album_art" />

    <com.android.systemui.surfaceeffects.turbulencenoise.TurbulenceNoiseView
        android:id="@+id/turbulence_noise_view"
        android:layout_width="match_parent"
        android:layout_height="@dimen/qs_media_session_height_expanded"
        app:layout_constraintStart_toStartOf="@id/album_art"
        app:layout_constraintEnd_toEndOf="@id/album_art"
        app:layout_constraintTop_toTopOf="@id/album_art"
        app:layout_constraintBottom_toBottomOf="@id/album_art" />

    <!-- Guideline for output switcher -->
    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/center_vertical_guideline"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.6" />

    <!-- Guideline for action buttons (collapsed view only) -->
    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/action_button_guideline"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:orientation="vertical"
        app:layout_constraintGuide_end="@dimen/qs_media_session_collapsed_guideline" />

    <!-- App icon -->
    <com.android.internal.widget.CachingIconView
        android:id="@+id/icon"
        android:layout_width="@dimen/qs_media_app_icon_size"
        android:layout_height="@dimen/qs_media_app_icon_size"
        android:layout_marginStart="@dimen/qs_media_padding"
        android:layout_marginTop="@dimen/qs_media_padding"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <!-- Seamless Output Switcher -->
    <LinearLayout
        android:id="@+id/media_seamless"
        android:orientation="horizontal"
        android:gravity="top|end"
        android:paddingTop="@dimen/qs_media_padding"
        android:paddingEnd="@dimen/qs_media_padding"
        android:background="@drawable/qs_media_light_source"
        android:forceHasOverlappingRendering="false"
        android:layout_width="wrap_content"
        android:layout_height="@dimen/min_clickable_item_size"
        android:layout_marginStart="@dimen/qs_center_guideline_padding"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintStart_toEndOf="@id/center_vertical_guideline"
        app:layout_constraintHorizontal_bias="1"
        app:layout_constrainedWidth="true"
        app:layout_constraintWidth_min="@dimen/min_clickable_item_size"
        app:layout_constraintHeight_min="@dimen/min_clickable_item_size">
        <com.android.systemui.animation.view.LaunchableLinearLayout
            android:id="@+id/media_seamless_button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:minHeight="@dimen/qs_seamless_height"
            android:maxHeight="@dimen/min_clickable_item_size"
            android:theme="@style/MediaPlayer.SolidButton"
            android:background="@drawable/qs_media_seamless_background"
            android:orientation="horizontal"
            android:contentDescription="@string/quick_settings_media_device_label">
            <ImageView
                android:id="@+id/media_seamless_image"
                android:layout_width="@dimen/qs_seamless_icon_size"
                android:layout_height="@dimen/qs_seamless_icon_size"
                android:layout_gravity="center"
                android:tint="?android:attr/textColorPrimary"
                android:src="@*android:drawable/ic_media_seamless" />
            <TextView
                android:id="@+id/media_seamless_text"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_vertical"
                android:layout_marginStart="4dp"
                android:fontFamily="@*android:string/config_headlineFontFamilyMedium"
                android:singleLine="true"
                android:text="@*android:string/ext_media_seamless_action"
                android:textDirection="locale"
                android:textSize="12sp"
                android:lineHeight="16sp" />
        </com.android.systemui.animation.view.LaunchableLinearLayout>
    </LinearLayout>

    <!-- Song name -->
    <TextView
        android:id="@+id/header_title"
        android:fontFamily="@*android:string/config_headlineFontFamilyMedium"
        android:singleLine="true"
        android:textSize="16sp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <!-- Explicit Indicator -->
    <com.android.internal.widget.CachingIconView
        android:id="@+id/media_explicit_indicator"
        android:layout_width="@dimen/qs_media_explicit_indicator_icon_size"
        android:layout_height="@dimen/qs_media_explicit_indicator_icon_size"
        android:src="@drawable/ic_media_explicit_indicator"
        />

    <!-- Artist name -->
    <TextView
        android:id="@+id/header_artist"
        android:fontFamily="@*android:string/config_headlineFontFamily"
        android:singleLine="true"
        style="@style/MediaPlayer.Subtitle"
        android:textSize="14sp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <ImageButton
        android:id="@+id/actionPlayPause"
        style="@style/MediaPlayer.SessionAction.Primary"
        android:layout_width="48dp"
        android:layout_height="48dp"
        android:layout_marginStart="@dimen/qs_media_padding"
        android:layout_marginEnd="@dimen/qs_media_padding" />

    <!-- See comment in media_session_collapsed.xml for how these barriers are used -->
    <androidx.constraintlayout.widget.Barrier
        android:id="@+id/media_action_barrier_start"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:orientation="vertical"
        app:layout_constraintTop_toBottomOf="@id/header_title"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:barrierDirection="start"
        app:constraint_referenced_ids="actionPrev,media_scrubbing_elapsed_time,media_progress_bar,actionNext,media_scrubbing_total_time,action0,action1,action2,action3,action4"
        />
    <androidx.constraintlayout.widget.Barrier
        android:id="@+id/media_action_barrier_end"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:orientation="vertical"
        app:layout_constraintTop_toBottomOf="@id/media_seamless"
        app:layout_constraintBottom_toBottomOf="parent"
        app:barrierDirection="end"
        app:constraint_referenced_ids="actionPrev,media_scrubbing_elapsed_time,media_progress_bar,actionNext,media_scrubbing_total_time,action0,action1,action2,action3,action4"
        app:layout_constraintRight_toRightOf="@id/actionPlayPause"
        />

    <!-- This barrier is used in expanded view to constrain the bottom row of actions -->
    <androidx.constraintlayout.widget.Barrier
        android:id="@+id/media_action_barrier_top"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:barrierDirection="top"
        app:constraint_referenced_ids="actionPrev,media_scrubbing_elapsed_time,media_progress_bar,actionNext,media_scrubbing_total_time,action0,action1,action2,action3,action4"
        />

    <!-- Button visibility will be controlled in code -->
    <ImageButton
        android:id="@+id/actionPrev"
        style="@style/MediaPlayer.SessionAction.Secondary"
        android:layout_width="48dp"
        android:layout_height="48dp"
        android:layout_marginStart="4dp"
        android:layout_marginEnd="0dp"
        android:layout_marginBottom="@dimen/qs_media_padding"
        android:layout_marginTop="0dp"
        />

    <!-- Elapsed time, shown only when scrubbing -->
    <!-- The space to the left of the progress bar will either be actionPrev or
         media_scrubbing_elapsed_time, so they use the same layout constraints. Visibilities of
         elements are controlled in code. -->
    <TextView
        android:id="@+id/media_scrubbing_elapsed_time"
        style="@style/MediaPlayer.ScrubbingTime"
        android:layout_width="48dp"
        android:layout_height="48dp"
        android:layout_marginStart="4dp"
        android:layout_marginEnd="0dp"
        android:layout_marginBottom="@dimen/qs_media_padding"
        android:layout_marginTop="0dp"
        android:visibility="gone"
        />

    <!-- Seek Bar -->
    <!-- As per Material Design on Bidirectionality, this is forced to LTR in code -->
    <SeekBar
        android:id="@+id/media_progress_bar"
        style="@style/MediaPlayer.ProgressBar"
        android:layout_width="0dp"
        android:layout_height="48dp"
        android:paddingTop="@dimen/qs_media_session_enabled_seekbar_vertical_padding"
        android:paddingBottom="12dp"
        android:maxHeight="@dimen/qs_media_enabled_seekbar_height"
        android:splitTrack="false"
        android:layout_marginBottom="@dimen/qs_media_padding"
        android:layout_marginTop="0dp"
        android:layout_marginStart="0dp"
        android:layout_marginEnd="0dp" />

    <ImageButton
        android:id="@+id/actionNext"
        style="@style/MediaPlayer.SessionAction.Secondary"
        android:layout_width="48dp"
        android:layout_height="48dp"
        android:layout_marginStart="0dp"
        android:layout_marginEnd="@dimen/qs_media_action_spacing"
        android:layout_marginBottom="@dimen/qs_media_padding"
        android:layout_marginTop="0dp" />

    <!-- Total time, shown only when scrubbing -->
    <!-- The space to the right of the progress bar will either be actionNext or
         media_scrubbing_total_time, so they use the same layout constraints. Visibilities of
         elements are controlled in code. -->
    <TextView
        android:id="@+id/media_scrubbing_total_time"
        style="@style/MediaPlayer.ScrubbingTime"
        android:layout_width="48dp"
        android:layout_height="48dp"
        android:layout_marginStart="0dp"
        android:layout_marginEnd="@dimen/qs_media_action_spacing"
        android:layout_marginBottom="@dimen/qs_media_padding"
        android:layout_marginTop="0dp"
        android:visibility="gone"
        />

    <ImageButton
        android:id="@+id/action0"
        style="@style/MediaPlayer.SessionAction.Secondary"
        android:layout_width="48dp"
        android:layout_height="48dp"
        android:layout_marginStart="@dimen/qs_media_action_spacing"
        android:layout_marginEnd="@dimen/qs_media_action_spacing"
        android:layout_marginBottom="@dimen/qs_media_padding"
        android:layout_marginTop="0dp"/>

    <ImageButton
        android:id="@+id/action1"
        style="@style/MediaPlayer.SessionAction.Secondary"
        android:layout_width="48dp"
        android:layout_height="48dp"
        android:layout_marginStart="@dimen/qs_media_action_spacing"
        android:layout_marginEnd="4dp"
        android:layout_marginBottom="@dimen/qs_media_padding"
        android:layout_marginTop="0dp" />

    <ImageButton
        android:id="@+id/action2"
        style="@style/MediaPlayer.SessionAction.Secondary"
        android:layout_width="48dp"
        android:layout_height="48dp"
        android:layout_marginStart="@dimen/qs_media_action_spacing"
        android:layout_marginEnd="4dp"
        android:layout_marginBottom="@dimen/qs_media_padding"
        android:layout_marginTop="0dp" />

    <ImageButton
        android:id="@+id/action3"
        style="@style/MediaPlayer.SessionAction.Secondary"
        android:layout_width="48dp"
        android:layout_height="48dp"
        android:layout_marginStart="@dimen/qs_media_action_spacing"
        android:layout_marginEnd="4dp"
        android:layout_marginBottom="@dimen/qs_media_padding"
        android:layout_marginTop="0dp" />

    <ImageButton
        android:id="@+id/action4"
        style="@style/MediaPlayer.SessionAction.Secondary"
        android:layout_width="48dp"
        android:layout_height="48dp"
        android:layout_marginStart="@dimen/qs_media_action_spacing"
        android:layout_marginEnd="4dp"
        android:layout_marginBottom="@dimen/qs_media_padding"
        android:layout_marginTop="0dp" />

    <include
        layout="@layout/media_long_press_menu" />

</com.android.systemui.util.animation.TransitionLayout>