ring-android/res/layout/activity_call_layout.xml

<?xml version="1.0" encoding="utf-8"?>
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Copyright (C) 2004-2014 Savoir-Faire Linux Inc.                     
                                                                    
Author: Adrien Beraud <adrien.beraud@gmail.com>                     
                                                                    
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<cx.ring.views.CallPaneLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/slidingpanelayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <FrameLayout
        android:id="@+id/message_list_frame"
        android:layout_width="300dp"
        android:layout_height="match_parent" />

    <FrameLayout
        android:id="@+id/ongoingcall_pane"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</cx.ring.views.CallPaneLayout>