testapps/res/layout/self_managed_call_list_item.xml

<?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
  -->

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
    <TextView
        android:id="@+id/phoneNumber"
        android:layout_gravity="left"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="25dp"
        android:text="TextView" />
    <TextView
        android:id="@+id/callState"
        android:layout_gravity="left"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="25dp"
        android:text="TextView" />
    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Active"
            android:id="@+id/setActiveButton" />
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Hold"
            android:id="@+id/setHeldButton" />
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Missed"
            android:id="@+id/missedButton" />
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Disconnect"
            android:id="@+id/disconnectButton" />
    </LinearLayout>
    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="🔊"
            android:id="@+id/speakerButton" />
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="👂"
            android:id="@+id/earpieceButton" />
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="🎧"
            android:id="@+id/bluetoothButton" />
        <CheckBox
            android:id="@+id/holdable"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" android:layout_weight="1"
            android:text="Holdable"/>
    </LinearLayout>
</LinearLayout>