v14/preference/res/layout-v21/preference_material.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ Copyright (C) 2015 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"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:minHeight="?android:attr/listPreferredItemHeightSmall"
    android:gravity="center_vertical"
    android:paddingStart="?android:attr/listPreferredItemPaddingStart"
    android:paddingEnd="?android:attr/listPreferredItemPaddingEnd"
    android:background="?android:attr/activatedBackgroundIndicator"
    android:clipToPadding="false">

    <LinearLayout
        android:id="@+id/icon_frame"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="-4dp"
        android:minWidth="60dp"
        android:gravity="start|center_vertical"
        android:orientation="horizontal"
        android:paddingEnd="12dp"
        android:paddingTop="4dp"
        android:paddingBottom="4dp">
        <android.support.v7.internal.widget.PreferenceImageView
            android:id="@+id/icon"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            app:maxWidth="48dp"
            app:maxHeight="48dp" />
    </LinearLayout>

  <RelativeLayout
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_weight="1"
      android:paddingTop="16dp"
      android:paddingBottom="16dp">

      <TextView android:id="@+id/title"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:singleLine="true"
          android:textAppearance="?android:attr/textAppearanceListItem"
          android:ellipsize="marquee" />

      <TextView android:id="@+id/summary"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_below="@id/title"
          android:layout_alignStart="@id/title"
          android:textAppearance="?android:attr/textAppearanceListItemSecondary"
          android:textColor="?android:attr/textColorSecondary"
          android:maxLines="10" />

  </RelativeLayout>

  <!-- Preference should place its actual preference widget here. -->
  <LinearLayout android:id="@+id/widget_frame"
      android:layout_width="wrap_content"
      android:layout_height="match_parent"
      android:gravity="end|center_vertical"
      android:paddingStart="16dp"
      android:orientation="vertical" />

</LinearLayout>