diff --git a/packages/SettingsLib/ActionButtonsPreference/lint-baseline.xml b/packages/SettingsLib/ActionButtonsPreference/lint-baseline.xml
index 22b25a31ae075..95b7e3b8033d7 100644
--- a/packages/SettingsLib/ActionButtonsPreference/lint-baseline.xml
+++ b/packages/SettingsLib/ActionButtonsPreference/lint-baseline.xml
@@ -26,10 +26,54 @@
     <issue
         id="NewApi"
         message="`?android:attr/dialogCornerRadius` requires API level 28 (current min is 21)"
-        errorLine1="        android:radius=&quot;?android:attr/dialogCornerRadius&quot;"
+        errorLine1="        android:topLeftRadius=&quot;?android:attr/dialogCornerRadius&quot;"
         errorLine2="              ~~~~~~~~~~~~~~~~~~~~~~~~~~~">
         <location
-            file="frameworks/base/packages/SettingsLib/ActionButtonsPreference/res/drawable/settingslib_rounded_background.xml"
+            file="frameworks/base/packages/SettingsLib/ActionButtonsPreference/res/drawable/half_rounded_left_bk.xml"
+            line="23"
+            column="9"/>
+    </issue>
+
+    <issue
+        id="NewApi"
+        message="`?android:attr/dialogCornerRadius` requires API level 28 (current min is 21)"
+        errorLine1="        android:bottomLeftRadius=&quot;?android:attr/dialogCornerRadius&quot;"
+        errorLine2="              ~~~~~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SettingsLib/ActionButtonsPreference/res/drawable/half_rounded_left_bk.xml"
+            line="25"
+            column="9"/>
+    </issue>
+
+    <issue
+        id="NewApi"
+        message="`?android:attr/dialogCornerRadius` requires API level 28 (current min is 21)"
+        errorLine1="        android:topRightRadius=&quot;?android:attr/dialogCornerRadius&quot;"
+        errorLine2="              ~~~~~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SettingsLib/ActionButtonsPreference/res/drawable/half_rounded_right_bk.xml"
+            line="24"
+            column="9"/>
+    </issue>
+
+    <issue
+        id="NewApi"
+        message="`?android:attr/dialogCornerRadius` requires API level 28 (current min is 21)"
+        errorLine1="        android:bottomRightRadius=&quot;?android:attr/dialogCornerRadius&quot;"
+        errorLine2="              ~~~~~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SettingsLib/ActionButtonsPreference/res/drawable/half_rounded_right_bk.xml"
+            line="26"
+            column="9"/>
+    </issue>
+
+    <issue
+        id="NewApi"
+        message="`?android:attr/dialogCornerRadius` requires API level 28 (current min is 21)"
+        errorLine1="        android:bottomRightRadius=&quot;?android:attr/dialogCornerRadius&quot;"
+        errorLine2="              ~~~~~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SettingsLib/ActionButtonsPreference/res/drawable/rounded_bk.xml"
             line="23"
             column="9"/>
     </issue>
diff --git a/packages/SettingsLib/ActionButtonsPreference/res/drawable/half_rounded_left_bk.xml b/packages/SettingsLib/ActionButtonsPreference/res/drawable/half_rounded_left_bk.xml
new file mode 100644
index 0000000000000..16a85d694bf81
--- /dev/null
+++ b/packages/SettingsLib/ActionButtonsPreference/res/drawable/half_rounded_left_bk.xml
@@ -0,0 +1,28 @@
+<?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.
+  -->
+
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+       xmlns:androidprv="http://schemas.android.com/apk/prv/res/android"
+       android:shape="rectangle">
+    <solid android:color="?androidprv:attr/colorSurface" />
+    <corners
+        android:topLeftRadius="?android:attr/dialogCornerRadius"
+        android:topRightRadius="0dp"
+        android:bottomLeftRadius="?android:attr/dialogCornerRadius"
+        android:bottomRightRadius="0dp"
+    />
+</shape>
\ No newline at end of file
diff --git a/packages/SettingsLib/ActionButtonsPreference/res/drawable/half_rounded_right_bk.xml b/packages/SettingsLib/ActionButtonsPreference/res/drawable/half_rounded_right_bk.xml
new file mode 100644
index 0000000000000..1b9f68fac8505
--- /dev/null
+++ b/packages/SettingsLib/ActionButtonsPreference/res/drawable/half_rounded_right_bk.xml
@@ -0,0 +1,28 @@
+<?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.
+  -->
+
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+       xmlns:androidprv="http://schemas.android.com/apk/prv/res/android"
+       android:shape="rectangle">
+    <solid android:color="?androidprv:attr/colorSurface" />
+    <corners
+        android:topLeftRadius="0dp"
+        android:topRightRadius="?android:attr/dialogCornerRadius"
+        android:bottomLeftRadius="0dp"
+        android:bottomRightRadius="?android:attr/dialogCornerRadius"
+    />
+</shape>
\ No newline at end of file
diff --git a/packages/SettingsLib/ActionButtonsPreference/res/drawable/left_rounded_ripple.xml b/packages/SettingsLib/ActionButtonsPreference/res/drawable/left_rounded_ripple.xml
new file mode 100644
index 0000000000000..1584b45aabf9d
--- /dev/null
+++ b/packages/SettingsLib/ActionButtonsPreference/res/drawable/left_rounded_ripple.xml
@@ -0,0 +1,21 @@
+<?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.
+  -->
+
+<ripple xmlns:android="http://schemas.android.com/apk/res/android"
+        android:color="?android:attr/colorControlHighlight">
+    <item android:drawable="@drawable/half_rounded_left_bk"/>
+</ripple>
\ No newline at end of file
diff --git a/packages/SettingsLib/ActionButtonsPreference/res/drawable/right_rounded_ripple.xml b/packages/SettingsLib/ActionButtonsPreference/res/drawable/right_rounded_ripple.xml
new file mode 100644
index 0000000000000..15f2b5cd79d0d
--- /dev/null
+++ b/packages/SettingsLib/ActionButtonsPreference/res/drawable/right_rounded_ripple.xml
@@ -0,0 +1,21 @@
+<?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.
+  -->
+
+<ripple xmlns:android="http://schemas.android.com/apk/res/android"
+        android:color="?android:attr/colorControlHighlight">
+    <item android:drawable="@drawable/half_rounded_right_bk"/>
+</ripple>
\ No newline at end of file
diff --git a/packages/SettingsLib/ActionButtonsPreference/res/drawable/rounded_bk.xml b/packages/SettingsLib/ActionButtonsPreference/res/drawable/rounded_bk.xml
new file mode 100644
index 0000000000000..a884ef11e8354
--- /dev/null
+++ b/packages/SettingsLib/ActionButtonsPreference/res/drawable/rounded_bk.xml
@@ -0,0 +1,25 @@
+<?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.
+  -->
+
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+       xmlns:androidprv="http://schemas.android.com/apk/prv/res/android"
+       android:shape="rectangle">
+    <solid android:color="?androidprv:attr/colorSurface" />
+    <corners
+        android:radius="?android:attr/dialogCornerRadius"
+    />
+</shape>
\ No newline at end of file
diff --git a/packages/SettingsLib/ActionButtonsPreference/res/drawable/rounded_ripple.xml b/packages/SettingsLib/ActionButtonsPreference/res/drawable/rounded_ripple.xml
new file mode 100644
index 0000000000000..90eefbe9a86e0
--- /dev/null
+++ b/packages/SettingsLib/ActionButtonsPreference/res/drawable/rounded_ripple.xml
@@ -0,0 +1,21 @@
+<?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.
+  -->
+
+<ripple xmlns:android="http://schemas.android.com/apk/res/android"
+        android:color="?android:attr/colorControlHighlight">
+    <item android:drawable="@drawable/rounded_bk"/>
+</ripple>
\ No newline at end of file
diff --git a/packages/SettingsLib/ActionButtonsPreference/res/drawable/settingslib_rounded_background.xml b/packages/SettingsLib/ActionButtonsPreference/res/drawable/settingslib_rounded_background.xml
deleted file mode 100644
index ae3834dc0d9da..0000000000000
--- a/packages/SettingsLib/ActionButtonsPreference/res/drawable/settingslib_rounded_background.xml
+++ /dev/null
@@ -1,25 +0,0 @@
-<?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.
-  -->
-
-<shape xmlns:android="http://schemas.android.com/apk/res/android"
-       xmlns:androidprv="http://schemas.android.com/apk/prv/res/android"
-       android:shape="rectangle">
-    <solid android:color="?androidprv:attr/colorSurface" />
-    <corners
-        android:radius="?android:attr/dialogCornerRadius"
-    />
-</shape>
\ No newline at end of file
diff --git a/packages/SettingsLib/ActionButtonsPreference/res/drawable/square_bk.xml b/packages/SettingsLib/ActionButtonsPreference/res/drawable/square_bk.xml
new file mode 100644
index 0000000000000..67b5107576a79
--- /dev/null
+++ b/packages/SettingsLib/ActionButtonsPreference/res/drawable/square_bk.xml
@@ -0,0 +1,25 @@
+<?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.
+  -->
+
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+       xmlns:androidprv="http://schemas.android.com/apk/prv/res/android"
+       android:shape="rectangle">
+    <solid android:color="?androidprv:attr/colorSurface" />
+    <corners
+        android:radius="0dp"
+    />
+</shape>
\ No newline at end of file
diff --git a/packages/SettingsLib/ActionButtonsPreference/res/drawable/square_ripple.xml b/packages/SettingsLib/ActionButtonsPreference/res/drawable/square_ripple.xml
new file mode 100644
index 0000000000000..06be00dc2279a
--- /dev/null
+++ b/packages/SettingsLib/ActionButtonsPreference/res/drawable/square_ripple.xml
@@ -0,0 +1,21 @@
+<?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.
+  -->
+
+<ripple xmlns:android="http://schemas.android.com/apk/res/android"
+        android:color="?android:attr/colorControlHighlight">
+    <item android:drawable="@drawable/square_bk"/>
+</ripple>
\ No newline at end of file
diff --git a/packages/SettingsLib/ActionButtonsPreference/res/layout-v31/settingslib_action_buttons.xml b/packages/SettingsLib/ActionButtonsPreference/res/layout-v31/settingslib_action_buttons.xml
index ba612d76fa57d..7c3f5a566bdbd 100644
--- a/packages/SettingsLib/ActionButtonsPreference/res/layout-v31/settingslib_action_buttons.xml
+++ b/packages/SettingsLib/ActionButtonsPreference/res/layout-v31/settingslib_action_buttons.xml
@@ -21,14 +21,13 @@
     android:layout_height="wrap_content"
     android:layout_margin="8dp"
     android:paddingHorizontal="8dp"
-    android:orientation="horizontal"
-    android:background="@drawable/settingslib_rounded_background">
+    android:orientation="horizontal">
 
     <Button
         android:id="@+id/button1"
         style="@style/SettingsLibActionButton"
         android:layout_width="0dp"
-        android:layout_height="wrap_content"
+        android:layout_height="match_parent"
         android:layout_weight="1"/>
 
     <View
@@ -43,7 +42,7 @@
         android:id="@+id/button2"
         style="@style/SettingsLibActionButton"
         android:layout_width="0dp"
-        android:layout_height="wrap_content"
+        android:layout_height="match_parent"
         android:layout_weight="1"/>
 
     <View
@@ -58,7 +57,7 @@
         android:id="@+id/button3"
         style="@style/SettingsLibActionButton"
         android:layout_width="0dp"
-        android:layout_height="wrap_content"
+        android:layout_height="match_parent"
         android:layout_weight="1"/>
 
     <View
@@ -73,6 +72,6 @@
         android:id="@+id/button4"
         style="@style/SettingsLibActionButton"
         android:layout_width="0dp"
-        android:layout_height="wrap_content"
+        android:layout_height="match_parent"
         android:layout_weight="1"/>
 </LinearLayout>
diff --git a/packages/SettingsLib/ActionButtonsPreference/res/values/arrays.xml b/packages/SettingsLib/ActionButtonsPreference/res/values/arrays.xml
new file mode 100644
index 0000000000000..fe88845daa645
--- /dev/null
+++ b/packages/SettingsLib/ActionButtonsPreference/res/values/arrays.xml
@@ -0,0 +1,44 @@
+<?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.
+  -->
+
+<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <!-- Do not translate. -->
+    <integer-array name="background_style1">
+        <item>@drawable/rounded_ripple</item>
+    </integer-array>
+
+    <!-- Do not translate. -->
+    <integer-array name="background_style2">
+        <item>@drawable/left_rounded_ripple</item>
+        <item>@drawable/right_rounded_ripple</item>
+    </integer-array>
+
+    <!-- Do not translate. -->
+    <integer-array name="background_style3">
+        <item>@drawable/left_rounded_ripple</item>
+        <item>@drawable/square_ripple</item>
+        <item>@drawable/right_rounded_ripple</item>
+    </integer-array>
+
+    <!-- Do not translate. -->
+    <integer-array name="background_style4">
+        <item>@drawable/left_rounded_ripple</item>
+        <item>@drawable/square_ripple</item>
+        <item>@drawable/square_ripple</item>
+        <item>@drawable/right_rounded_ripple</item>
+    </integer-array>
+</resources>
\ No newline at end of file
diff --git a/packages/SettingsLib/ActionButtonsPreference/src/com/android/settingslib/widget/ActionButtonsPreference.java b/packages/SettingsLib/ActionButtonsPreference/src/com/android/settingslib/widget/ActionButtonsPreference.java
index 029c9196fa5e2..4d3ca945f7e15 100644
--- a/packages/SettingsLib/ActionButtonsPreference/src/com/android/settingslib/widget/ActionButtonsPreference.java
+++ b/packages/SettingsLib/ActionButtonsPreference/src/com/android/settingslib/widget/ActionButtonsPreference.java
@@ -18,6 +18,7 @@ package com.android.settingslib.widget;
 
 import android.content.Context;
 import android.content.res.Resources;
+import android.content.res.TypedArray;
 import android.graphics.drawable.Drawable;
 import android.text.TextUtils;
 import android.util.AttributeSet;
@@ -54,12 +55,21 @@ import java.util.List;
 public class ActionButtonsPreference extends Preference {
 
     private static final String TAG = "ActionButtonPreference";
+    private static final boolean mIsAtLeastS = BuildCompatUtils.isAtLeastS();
+    private static final int SINGLE_BUTTON_STYLE = 1;
+    private static final int TWO_BUTTONS_STYLE = 2;
+    private static final int THREE_BUTTONS_STYLE = 3;
+    private static final int FOUR_BUTTONS_STYLE = 4;
 
     private final ButtonInfo mButton1Info = new ButtonInfo();
     private final ButtonInfo mButton2Info = new ButtonInfo();
     private final ButtonInfo mButton3Info = new ButtonInfo();
     private final ButtonInfo mButton4Info = new ButtonInfo();
     private final List<ButtonInfo> mVisibleButtonInfos = new ArrayList<>(4);
+    private final List<Drawable> mBtnBackgroundStyle1 = new ArrayList<>(1);
+    private final List<Drawable> mBtnBackgroundStyle2 = new ArrayList<>(2);
+    private final List<Drawable> mBtnBackgroundStyle3 = new ArrayList<>(3);
+    private final List<Drawable> mBtnBackgroundStyle4 = new ArrayList<>(4);
 
     private View mDivider1;
     private View mDivider2;
@@ -89,15 +99,27 @@ public class ActionButtonsPreference extends Preference {
     private void init() {
         setLayoutResource(R.layout.settingslib_action_buttons);
         setSelectable(false);
+
+        final Resources res = getContext().getResources();
+        fetchDrawableArray(mBtnBackgroundStyle1, res.obtainTypedArray(R.array.background_style1));
+        fetchDrawableArray(mBtnBackgroundStyle2, res.obtainTypedArray(R.array.background_style2));
+        fetchDrawableArray(mBtnBackgroundStyle3, res.obtainTypedArray(R.array.background_style3));
+        fetchDrawableArray(mBtnBackgroundStyle4, res.obtainTypedArray(R.array.background_style4));
+    }
+
+    private void fetchDrawableArray(List<Drawable> drawableList, TypedArray typedArray) {
+        for (int i = 0; i < typedArray.length(); i++) {
+            drawableList.add(
+                    getContext().getDrawable(typedArray.getResourceId(i, 0 /* defValue */)));
+        }
     }
 
     @Override
     public void onBindViewHolder(PreferenceViewHolder holder) {
         super.onBindViewHolder(holder);
 
-        final boolean allowedDivider = !BuildCompatUtils.isAtLeastS();
-        holder.setDividerAllowedAbove(allowedDivider);
-        holder.setDividerAllowedBelow(allowedDivider);
+        holder.setDividerAllowedAbove(!mIsAtLeastS);
+        holder.setDividerAllowedBelow(!mIsAtLeastS);
 
         mButton1Info.mButton = (Button) holder.findViewById(R.id.button1);
         mButton2Info.mButton = (Button) holder.findViewById(R.id.button2);
@@ -113,25 +135,95 @@ public class ActionButtonsPreference extends Preference {
         mButton3Info.setUpButton();
         mButton4Info.setUpButton();
 
-        // Add visible button into list only
-        if (mButton1Info.isVisible()) {
+        // Clear info list to avoid duplicate setup.
+        if (!mVisibleButtonInfos.isEmpty()) {
+            mVisibleButtonInfos.clear();
+        }
+        updateLayout();
+    }
+
+    @Override
+    protected void notifyChanged() {
+        super.notifyChanged();
+
+        // Update buttons background and layout when notified and visible button list exist.
+        if (!mVisibleButtonInfos.isEmpty()) {
+            mVisibleButtonInfos.clear();
+            updateLayout();
+        }
+    }
+
+    private void updateLayout() {
+        // Add visible button into list only when platform version is newer than S.
+        if (mButton1Info.isVisible() && mIsAtLeastS) {
             mVisibleButtonInfos.add(mButton1Info);
         }
-        if (mButton2Info.isVisible()) {
+        if (mButton2Info.isVisible() && mIsAtLeastS) {
             mVisibleButtonInfos.add(mButton2Info);
         }
-        if (mButton3Info.isVisible()) {
+        if (mButton3Info.isVisible() && mIsAtLeastS) {
             mVisibleButtonInfos.add(mButton3Info);
         }
-        if (mButton4Info.isVisible()) {
+        if (mButton4Info.isVisible() && mIsAtLeastS) {
             mVisibleButtonInfos.add(mButton4Info);
         }
 
+        final boolean isRtl = getContext().getResources().getConfiguration()
+                .getLayoutDirection() == View.LAYOUT_DIRECTION_RTL;
+        switch (mVisibleButtonInfos.size()) {
+            case SINGLE_BUTTON_STYLE :
+                if (isRtl) {
+                    setupRtlBackgrounds(mVisibleButtonInfos, mBtnBackgroundStyle1);
+                } else {
+                    setupBackgrounds(mVisibleButtonInfos, mBtnBackgroundStyle1);
+                }
+                break;
+            case TWO_BUTTONS_STYLE :
+                if (isRtl) {
+                    setupRtlBackgrounds(mVisibleButtonInfos, mBtnBackgroundStyle2);
+                } else {
+                    setupBackgrounds(mVisibleButtonInfos, mBtnBackgroundStyle2);
+                }
+                break;
+            case THREE_BUTTONS_STYLE :
+                if (isRtl) {
+                    setupRtlBackgrounds(mVisibleButtonInfos, mBtnBackgroundStyle3);
+                } else {
+                    setupBackgrounds(mVisibleButtonInfos, mBtnBackgroundStyle3);
+                }
+                break;
+            case FOUR_BUTTONS_STYLE :
+                if (isRtl) {
+                    setupRtlBackgrounds(mVisibleButtonInfos, mBtnBackgroundStyle4);
+                } else {
+                    setupBackgrounds(mVisibleButtonInfos, mBtnBackgroundStyle4);
+                }
+                break;
+            default:
+                Log.e(TAG, "No visible buttons info, skip background settings.");
+                break;
+        }
+
         setupDivider1();
         setupDivider2();
         setupDivider3();
     }
 
+    private void setupBackgrounds(
+            List<ButtonInfo> buttonInfoList, List<Drawable> buttonBackgroundStyles) {
+        for (int i = 0; i < buttonBackgroundStyles.size(); i++) {
+            buttonInfoList.get(i).mButton.setBackground(buttonBackgroundStyles.get(i));
+        }
+    }
+
+    private void setupRtlBackgrounds(
+            List<ButtonInfo> buttonInfoList, List<Drawable> buttonBackgroundStyles) {
+        for (int i = buttonBackgroundStyles.size() - 1; i >= 0; i--) {
+            buttonInfoList.get(buttonBackgroundStyles.size() - 1 - i)
+                    .mButton.setBackground(buttonBackgroundStyles.get(i));
+        }
+    }
+
     /**
      * Set the visibility state of button1.
      */