InCallUI/res/values/styles.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ Copyright (C) 2013 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>
    <drawable name="grayBg">#FF333333</drawable>

    <style name="info_label">
        <item name="android:layout_height">wrap_content</item>
        <item name="android:layout_width">wrap_content</item>
        <item name="android:textAppearance">@style/TextAppearance.info_label</item>
        <item name="android:paddingEnd">4dip</item>
    </style>

    <style name="info_layout">
        <item name="android:orientation">vertical</item>
        <item name="android:paddingStart">10dip</item>
        <item name="android:paddingTop">10dip</item>
        <item name="android:paddingEnd">10dip</item>
        <item name="android:paddingBottom">10dip</item>
        <item name="android:layout_width">match_parent</item>
        <item name="android:layout_height">match_parent</item>
    </style>

    <style name="entry_layout">
        <item name="android:orientation">vertical</item>
        <item name="android:layout_width">wrap_content</item>
        <item name="android:layout_height">wrap_content</item>
    </style>

    <style name="TextAppearance" parent="android:TextAppearance">
    </style>

    <style name="TextAppearance.info_label">
        <item name="android:textSize">14sp</item>
        <item name="android:textStyle">bold</item>
    </style>


    <!-- Buttons in the main "button row" of the in-call onscreen touch UI. -->
    <style name="InCallButton">
        <item name="android:layout_width">@dimen/in_call_button_dimension</item>
        <item name="android:layout_height">@dimen/in_call_button_dimension</item>
        <item name="android:layout_marginBottom">@dimen/call_button_margin_vertical</item>
        <item name="android:layout_marginLeft">@dimen/call_button_margin_horizontal</item>
        <item name="android:layout_marginRight">@dimen/call_button_margin_horizontal</item>
        <item name="android:background">?android:attr/selectableItemBackground</item>
    </style>

    <!-- "Compound button" variation of InCallButton.
         These buttons have the concept of two states: checked and unchecked. This style is just
         like "InCallButton" except that we also clear out android:background, android:textOn,
         android:textOff, to avoid the default behavior of the ToggleButton class. -->
    <style name="InCallCompoundButton" parent="InCallButton">
        <item name="android:background">@null</item>
        <item name="android:textOn">@null</item>
        <item name="android:textOff">@null</item>
    </style>

    <!-- Theme for the InCallActivity activity. Should have a transparent background for the
         circular reveal animation for a new outgoing call to work correctly. We don't just use
         Theme.Black.NoTitleBar directly, since we want any popups or dialogs from the
         InCallActivity to have the correct Material style. -->
    <style name="Theme.InCallScreen" parent="@android:style/Theme.Material.Light">
        <item name="android:windowAnimationStyle">@null</item>
        <item name="android:windowIsTranslucent">false</item>
        <item name="android:windowBackground">@android:color/transparent</item>
        <item name="android:windowContentOverlay">@null</item>
        <item name="dialpad_key_button_touch_tint">@color/incall_dialpad_touch_tint</item>
        <item name="android:textColorPrimary">@color/incall_call_banner_text_color</item>
        <item name="android:colorPrimaryDark">@color/dialer_theme_color_dark</item>
        <item name="android:popupMenuStyle">@style/InCallPopupMenuStyle</item>
        <item name="android:actionBarStyle">@style/InCallActionBarStyle</item>
        <item name="android:buttonStyleToggle">@style/InCallCompoundButton</item>
        <item name="android:alertDialogTheme">@android:style/Theme.Material.Light.Dialog.Alert</item>
    </style>

    <style name="InCallPopupMenuStyle" parent="@android:style/Theme.Material.Light">
        <item name="android:textColorPrimary">@color/popup_menu_color</item>
    </style>

    <style name="InCallActionBarStyle" parent="@android:style/Widget.Material.Light.ActionBar">
        <item name="android:background">@color/incall_action_bar_background_color</item>
        <item name="android:backgroundStacked">@color/incall_banner_secondary_background_color</item>
        <item name="android:textColor">@color/incall_action_bar_text_color</item>
    </style>

</resources>