data/res/layout/notification_template_material_base.xml

<?xml version="1.0" encoding="utf-8"?><!--
  ~ Copyright (C) 2014 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
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/status_bar_latest_event_content"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    android:minHeight="@dimen/notification_headerless_min_height"
    android:tag="base"
    >

    <ImageView
        android:id="@+id/left_icon"
        android:layout_width="@dimen/notification_left_icon_size"
        android:layout_height="@dimen/notification_left_icon_size"
        android:layout_gravity="center_vertical|start"
        android:layout_marginStart="@dimen/notification_left_icon_start"
        android:background="@drawable/notification_large_icon_outline"
        android:clipToOutline="true"
        android:importantForAccessibility="no"
        android:scaleType="centerCrop"
        android:visibility="gone"
        />

    <com.android.internal.widget.CachingIconView
        android:id="@+id/icon"
        android:layout_width="@dimen/notification_icon_circle_size"
        android:layout_height="@dimen/notification_icon_circle_size"
        android:layout_gravity="center_vertical|start"
        android:layout_marginStart="@dimen/notification_icon_circle_start"
        android:background="@drawable/notification_icon_circle"
        android:padding="@dimen/notification_icon_circle_padding"
        android:maxDrawableWidth="@dimen/notification_icon_circle_size"
        android:maxDrawableHeight="@dimen/notification_icon_circle_size"
        />

    <FrameLayout
        android:id="@+id/alternate_expand_target"
        android:layout_width="@dimen/notification_content_margin_start"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:importantForAccessibility="no"
        />

    <LinearLayout
        android:id="@+id/notification_headerless_view_row"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginStart="@dimen/notification_content_margin_start"
        android:orientation="horizontal"
        >

        <LinearLayout
            android:id="@+id/notification_headerless_view_column"
            android:layout_width="0px"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:layout_weight="1"
            android:layout_marginBottom="@dimen/notification_headerless_margin_twoline"
            android:layout_marginTop="@dimen/notification_headerless_margin_twoline"
            android:orientation="vertical"
            >

            <NotificationTopLineView
                android:id="@+id/notification_top_line"
                android:layout_width="wrap_content"
                android:layout_height="@dimen/notification_headerless_line_height"
                android:clipChildren="false"
                android:theme="@style/Theme.DeviceDefault.Notification"
                >

                <!--
                NOTE: The notification_top_line_views layout contains the app_name_text.
                In order to include the title view at the beginning, the Notification.Builder
                has logic to hide that view whenever this title view is to be visible.
                -->

                <TextView
                    android:id="@+id/title"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginEnd="@dimen/notification_header_separating_margin"
                    android:ellipsize="end"
                    android:fadingEdge="horizontal"
                    android:singleLine="true"
                    android:textAlignment="viewStart"
                    android:textAppearance="@style/TextAppearance.DeviceDefault.Notification.Title"
                    />

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

            </NotificationTopLineView>

            <LinearLayout
                android:id="@+id/notification_main_column"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical"
                >

                <com.android.internal.widget.NotificationVanishingFrameLayout
                    android:layout_width="match_parent"
                    android:layout_height="@dimen/notification_headerless_line_height"
                    >
                    <!-- This is the simplest way to keep this text vertically centered without
                     gravity="center_vertical" which causes jumpiness in expansion animations. -->
                    <include
                        layout="@layout/notification_template_text"
                        android:layout_width="match_parent"
                        android:layout_height="@dimen/notification_text_height"
                        android:layout_gravity="center_vertical"
                        android:layout_marginTop="0dp"
                        />
                </com.android.internal.widget.NotificationVanishingFrameLayout>

                <include
                    layout="@layout/notification_template_progress"
                    android:layout_width="match_parent"
                    android:layout_height="@dimen/notification_headerless_line_height"
                    />

            </LinearLayout>

        </LinearLayout>

        <ImageView
            android:id="@+id/right_icon"
            android:layout_width="@dimen/notification_right_icon_size"
            android:layout_height="@dimen/notification_right_icon_size"
            android:layout_gravity="center_vertical|end"
            android:layout_marginTop="@dimen/notification_right_icon_headerless_margin"
            android:layout_marginBottom="@dimen/notification_right_icon_headerless_margin"
            android:layout_marginStart="@dimen/notification_right_icon_content_margin"
            android:background="@drawable/notification_large_icon_outline"
            android:clipToOutline="true"
            android:importantForAccessibility="no"
            android:scaleType="centerCrop"
            />

        <FrameLayout
            android:id="@+id/expand_button_touch_container"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:minWidth="@dimen/notification_content_margin_end"
            >

            <include layout="@layout/notification_expand_button"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_vertical|end"
                />

        </FrameLayout>

    </LinearLayout>

</FrameLayout>