diff --git a/packages/SettingsLib/res/layout/preference_dropdown_material_settings.xml b/packages/SettingsLib/res/layout/preference_dropdown_material_settings.xml
deleted file mode 100644
index a0b8155c08184..0000000000000
--- a/packages/SettingsLib/res/layout/preference_dropdown_material_settings.xml
+++ /dev/null
@@ -1,35 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
-  Copyright (C) 2017 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.
-  -->
-
-
-<!-- Based off frameworks/base/core/res/res/layout/preference_dropdown_material.xml
-     except that icon space in this layout is always reserved -->
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content">
-
-    <Spinner
-        android:id="@+id/spinner"
-        android:layout_width="0dp"
-        android:layout_height="wrap_content"
-        android:layout_marginStart="@dimen/preference_no_icon_padding_start"
-        android:visibility="invisible" />
-
-    <include layout="@layout/preference_material"/>
-
-</FrameLayout>
\ No newline at end of file
diff --git a/packages/SettingsLib/res/values/styles_support_preference.xml b/packages/SettingsLib/res/values/styles_support_preference.xml
index 59de6c904e89f..6e611960b2c77 100644
--- a/packages/SettingsLib/res/values/styles_support_preference.xml
+++ b/packages/SettingsLib/res/values/styles_support_preference.xml
@@ -20,82 +20,14 @@
 
     <dimen name="preference_no_icon_padding_start">72dp</dimen>
 
-    <!-- Fragment style -->
-    <style name="PreferenceFragmentStyle.SettingsBase" parent="@*android:style/PreferenceFragment.Material">
-        <item name="allowDividerAfterLastItem">false</item>
-    </style>
-
-    <!-- Preferences -->
-    <style name="Preference.SettingsBase" parent="@style/Preference.Material">
-        <item name="allowDividerAbove">false</item>
-        <item name="allowDividerBelow">true</item>
-        <item name="singleLineTitle">false</item>
-        <item name="iconSpaceReserved">true</item>
-    </style>
-
-    <!-- Preference category -->
-    <style name="Preference.Category.SettingsBase" parent="@style/Preference.Category.Material">
-        <item name="allowDividerAbove">true</item>
-        <item name="allowDividerBelow">true</item>
-        <item name="android:layout">@layout/preference_category_material_settings</item>
-    </style>
-
-    <!-- Preference screen -->
-    <style name="Preference.Screen.SettingsBase" parent="@style/Preference.PreferenceScreen.Material">
-        <item name="allowDividerAbove">false</item>
-        <item name="allowDividerBelow">true</item>
-        <item name="iconSpaceReserved">true</item>
-    </style>
-
     <!-- Footer Preferences -->
-    <style name="Preference.FooterPreference.SettingsBase" parent="Preference.SettingsBase">
+    <style name="Preference.FooterPreference.SettingsBase" parent="@style/Preference.Material">
         <item name="android:layout">@layout/preference_footer</item>
         <item name="allowDividerAbove">true</item>
     </style>
 
-    <!-- Dropdown Preferences -->
-    <style name="Preference.DropdownPreference.SettingsBase" parent="Preference.SettingsBase">
-        <item name="android:layout">@layout/preference_dropdown_material_settings</item>
-    </style>
-
-    <!-- Switch Preferences -->
-    <style name="Preference.SwitchPreference.SettingsBase" parent="@style/Preference.SwitchPreference.Material">
-        <item name="allowDividerAbove">false</item>
-        <item name="allowDividerBelow">true</item>
-        <item name="iconSpaceReserved">true</item>
-        <item name="singleLineTitle">false</item>
-    </style>
-
-    <!-- CheckBox Preferences -->
-    <style name="Preference.CheckBoxPreference.SettingsBase" parent="@style/Preference.CheckBoxPreference.Material">
-        <item name="allowDividerAbove">false</item>
-        <item name="allowDividerBelow">true</item>
-        <item name="iconSpaceReserved">true</item>
-        <item name="singleLineTitle">false</item>
-    </style>
-
-    <!-- EditText Preferences -->
-    <style name="Preference.EditTextPreference.SettingsBase"
-           parent="@style/Preference.DialogPreference.EditTextPreference.Material">
-        <item name="allowDividerAbove">false</item>
-        <item name="allowDividerBelow">true</item>
-        <item name="iconSpaceReserved">true</item>
-        <item name="singleLineTitle">false</item>
-    </style>
-
-    <style name="PreferenceThemeOverlay.SettingsBase" parent="@style/PreferenceThemeOverlay.v14.Material">
-        <!-- Parent path frameworks/support/v14/preference/res/values/themes.xml -->
-        <item name="android:scrollbars">vertical</item>
-        <item name="preferenceFragmentStyle">@style/PreferenceFragmentStyle.SettingsBase</item>
-        <item name="preferenceCategoryStyle">@style/Preference.Category.SettingsBase</item>
-        <item name="preferenceScreenStyle">@style/Preference.Screen.SettingsBase</item>
-        <item name="preferenceStyle">@style/Preference.SettingsBase</item>
-        <item name="dialogPreferenceStyle">@style/Preference.SettingsBase</item>
-        <item name="editTextPreferenceStyle">@style/Preference.EditTextPreference.SettingsBase</item>
+    <style name="PreferenceThemeOverlay.SettingsBase" parent="@style/PreferenceThemeOverlay">
         <item name="footerPreferenceStyle">@style/Preference.FooterPreference.SettingsBase</item>
-        <item name="switchPreferenceStyle">@style/Preference.SwitchPreference.SettingsBase</item>
-        <item name="checkBoxPreferenceStyle">@style/Preference.CheckBoxPreference.SettingsBase</item>
-        <item name="dropdownPreferenceStyle">@style/Preference.DropdownPreference.SettingsBase</item>
     </style>
 
-</resources>
\ No newline at end of file
+</resources>