res/layout/playback_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2011 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.
-->

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/background_dialer_light"
>
    <!-- Mute, playback, trash buttons. -->
    <LinearLayout
        android:id="@+id/buttons_linear_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:layout_alignParentTop="true"
    >
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="58dip"
            android:layout_marginEnd="@dimen/call_detail_button_spacing"
            android:layout_weight="1"
            android:background="@color/background_dialer_list_items"
        >
            <ImageButton
                android:id="@+id/playback_start_stop"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:background="?android:attr/selectableItemBackground"
                android:src="@drawable/ic_hold_pause"
                android:contentDescription="@string/description_playback_start_stop"
            />
        </LinearLayout>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="58dip"
            android:layout_weight="1"
            android:background="@color/background_dialer_list_items"
        >
            <ImageButton
                android:id="@+id/playback_speakerphone"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:background="?android:attr/selectableItemBackground"
                android:src="@drawable/ic_speakerphone_on"
                android:contentDescription="@string/description_playback_speakerphone"
            />
        </LinearLayout>
    </LinearLayout>
    <RelativeLayout
        android:id="@+id/seek_container"
        android:layout_width="match_parent"
        android:layout_height="80dip"
        android:layout_below="@id/buttons_linear_layout"
        android:layout_marginTop="@dimen/call_detail_button_spacing"
        android:background="@color/background_dialer_list_items"
    >
        <!-- SeekBar left-right margin decreased from redlines 72dip by 8dip to account for
             half thumb width (thumb is 16dip).
             Vertically, SeekBar and rate buttons should be below centre, position achieved by
             making them centred but giving a difference between top and bottom padding,
             difference is currently 10dip. -->
        <SeekBar
            android:id="@+id/playback_seek"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:progressDrawable="@drawable/seekbar_drawable"
            android:thumb="@drawable/seek_bar_thumb"
            android:thumbOffset="8dip"
            android:progress="0"
            android:paddingStart="8dip"
            android:paddingEnd="8dip"
            android:paddingTop="30dip"
            android:paddingBottom="20dip"
            android:layout_marginEnd="64dip"
            android:layout_marginStart="64dip"
            android:max="0"
            android:layout_centerVertical="true"
            android:contentDescription="@string/description_playback_seek"
        />
        <TextView
            android:id="@+id/playback_position_text"
            android:layout_height="wrap_content"
            android:layout_width="wrap_content"
            android:textSize="14sp"
            android:layout_alignParentTop="true"
            android:layout_centerHorizontal="true"
            android:layout_marginTop="10dip"
        />
        <TextView
            android:id="@+id/playback_speed_text"
            android:layout_height="wrap_content"
            android:layout_width="wrap_content"
            android:textSize="14sp"
            android:layout_alignParentTop="true"
            android:layout_centerHorizontal="true"
            android:layout_marginTop="10dip"
            android:alpha="0"
        />
        <ImageButton
            android:id="@+id/rate_decrease_button"
            android:src="@drawable/ic_minus"
            android:layout_width="64dip"
            android:layout_height="wrap_content"
            android:background="?android:attr/selectableItemBackground"
            android:paddingBottom="19dip"
            android:paddingTop="29dip"
            android:layout_alignParentStart="true"
            android:layout_centerVertical="true"
            android:contentDescription="@string/description_rate_decrease"
        />
        <ImageButton
            android:id="@+id/rate_increase_button"
            android:src="@drawable/ic_plus"
            android:layout_width="64dip"
            android:layout_height="wrap_content"
            android:background="?android:attr/selectableItemBackground"
            android:paddingBottom="19dip"
            android:paddingTop="29dip"
            android:layout_alignParentEnd="true"
            android:layout_centerVertical="true"
            android:contentDescription="@string/description_rate_increase"
        />
        <View
            android:layout_width="match_parent"
            android:layout_height="2dp"
            android:background="@color/background_dialer_light"
            android:layout_alignParentBottom="true"/>
    </RelativeLayout>
</RelativeLayout>