data/res/layout/transient_notification.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
/* //device/apps/common/res/layout/transient_notification.xml
**
** Copyright 2006, 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="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:gravity="center_vertical"
    android:maxWidth="@dimen/toast_width"
    android:background="?android:attr/toastFrameBackground"
    android:elevation="@dimen/toast_elevation"
    android:layout_marginEnd="16dp"
    android:layout_marginStart="16dp"
    android:paddingStart="16dp"
    android:paddingEnd="16dp">

    <TextView
        android:id="@android:id/message"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:ellipsize="end"
        android:maxLines="2"
        android:paddingTop="12dp"
        android:paddingBottom="12dp"
        android:lineHeight="20sp"
        android:textAppearance="@style/TextAppearance.Toast"/>
</LinearLayout>