ring-android/app/src/main/res/layout/frag_call.xml

<?xml version="1.0" encoding="utf-8"?><!--
Copyright (C) 2004-2016 Savoir-faire Linux Inc.

Author: Adrien Beraud <adrien.beraud@savoirfairelinux.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
-->
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".client.CallActivity">

    <SurfaceView
        android:id="@+id/video_preview_surface"
        android:layout_width="match_parent"
        android:layout_height="32dp"
        android:layout_alignParentEnd="false"
        android:layout_alignParentStart="false"
        android:layout_centerInParent="true"
        android:layout_gravity="center"
        android:visibility="gone" />

    <FrameLayout
        android:id="@+id/inner_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true">

        <SurfaceView
            android:id="@+id/camera_preview_surface"
            android:layout_width="160dp"
            android:layout_height="120dp"
            android:layout_alignParentBottom="true"
            android:layout_alignParentEnd="true"
            android:layout_alignParentRight="true"
            android:layout_margin="8dp"
            android:layout_gravity="bottom|right"
            android:visibility="gone" />

        <LinearLayout
            android:id="@+id/contact_bubble_layout"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_centerHorizontal="true"
            android:layout_centerVertical="true"
            android:layout_marginBottom="16dp"
            android:orientation="vertical"
            android:gravity="center_horizontal"
            android:layout_gravity="center_vertical">

            <ImageView
                android:id="@+id/contact_bubble"
                android:layout_width="160dp"
                android:layout_height="160dp"
                android:layout_alignParentStart="false"
                android:layout_alignParentTop="true"
                android:layout_centerHorizontal="true"
                android:layout_marginBottom="16dp"
                android:layout_marginLeft="16dp"
                android:layout_marginRight="16dp" />

            <TextView
                android:id="@+id/contact_bubble_txt"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_below="@+id/contact_bubble"
                android:gravity="center_horizontal"
                android:textAppearance="?android:attr/textAppearanceLarge"
                android:textColor="@color/text_color_primary_dark"
                android:singleLine="true" />

            <TextView
                android:id="@+id/contact_bubble_num_txt"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_alignParentEnd="false"
                android:layout_below="@+id/contact_bubble_txt"
                android:gravity="center_horizontal"
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:textColor="@color/text_color_secondary_dark"
                android:singleLine="true"
                android:ellipsize="middle"
                android:paddingStart="8dp"
                android:paddingEnd="8dp" />

            <TextView
                android:id="@+id/call_status_txt"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerVertical="true"
                android:textColor="@color/text_color_primary_dark"
                android:textSize="16sp"
                android:textAppearance="?android:attr/textAppearanceMedium" />

        </LinearLayout>

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:layout_alignParentBottom="true"
            android:layout_centerHorizontal="true"
            android:layout_margin="12dp"
            android:layout_gravity="bottom|center_horizontal">

            <android.support.design.widget.FloatingActionButton
                android:id="@+id/call_refuse_btn"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_margin="16dp"
                android:contentDescription="@string/action_call_decline"
                android:src="@drawable/ic_call_end_white_24dp"
                app:backgroundTint="@color/error_red"
                app:elevation="6dp"
                app:pressedTranslationZ="12dp"
                app:rippleColor="@android:color/white" />

            <android.support.design.widget.FloatingActionButton
                android:id="@+id/call_accept_btn"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_margin="16dp"
                android:contentDescription="@string/action_call_accept"
                android:src="@drawable/ic_call_white_24dp"
                app:backgroundTint="#4caf50"
                app:elevation="6dp"
                app:pressedTranslationZ="12dp"
                app:rippleColor="@android:color/white" />
        </LinearLayout>

        <android.support.design.widget.FloatingActionButton
            android:id="@+id/call_hangup_btn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_centerHorizontal="true"
            android:layout_margin="28dp"
            android:src="@drawable/ic_call_end_white_24dp"
            app:backgroundTint="@color/error_red"
            app:elevation="6dp"
            app:pressedTranslationZ="12dp"
            app:rippleColor="@android:color/white"
            android:layout_gravity="bottom|center_horizontal"
            android:visibility="gone" />

        <RelativeLayout
            android:id="@+id/call_status_bar"
            android:layout_width="match_parent"
            android:layout_height="?android:attr/actionBarSize"
            android:layout_alignParentTop="true"
            android:visibility="visible">

            <ViewSwitcher
                android:id="@+id/security_switcher"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerVertical="true"
                android:visibility="gone">

                <Button
                    android:id="@+id/confirm_sas"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:textColor="@android:color/white"
                    android:textSize="12sp" />

                <ImageView
                    android:id="@+id/lock_image"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="end|center_vertical" />
            </ViewSwitcher>

            <ImageView
                android:id="@+id/security_indicator"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentEnd="true"
                android:layout_alignParentRight="true"
                android:layout_centerVertical="true"
                android:layout_margin="16dp"
                android:src="@drawable/ic_lock_white_24dp"
                android:tint="#4caf50"
                android:visibility="gone" />

        </RelativeLayout>
    </FrameLayout>
</FrameLayout>