res/layout/test_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- 
Copyright (C) 2004-2012 Savoir-Faire Linux Inc.                     
                                                                    
Author: Adrien Beraud <adrien.beraud@gmail.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, write to the Free Software         
 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.          
                                                                    
Additional permission under GNU GPL version 3 section 7:            
                                                                    
If you modify this program, or any covered work, by linking or      
combining it with the OpenSSL project's OpenSSL library (or a       
modified version of that library), containing parts covered by the  
terms of the OpenSSL or SSLeay licenses, Savoir-Faire Linux Inc.    
grants you additional permission to convey the resulting work.      
Corresponding Source for a non-source form of such a combination    
shall include the source code for the parts of OpenSSL used as well 
as that of the covered work.
 -->
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
	android:orientation="vertical"
	android:paddingLeft="8dp"
	android:paddingRight="8dp" >

    <Button
        android:id="@+id/buttonInit"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:onClick="onClick"
        android:text="init" />
    
    <Button
        android:id="@+id/buttonCall"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/buttonInit"
        android:onClick="onClick"
        android:text="call" />

    <Button
        android:id="@+id/buttonTest1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/buttonCall"
        android:onClick="onClick"
        android:text="test1" />

    <TextView
        android:id="@+id/callVoid_text"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/buttonTest1"
        android:text="callVoidText" />
    
    <Button
        android:id="@+id/buttonCallVoid"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/callVoid_text"
        android:onClick="onClick"
        android:text="CallVoid" />

    <TextView
        android:id="@+id/NewData_text"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/buttonCallVoid"
        android:layout_centerHorizontal="true"
        android:text="getNewDataText" />
    
    <Button
        android:id="@+id/buttonGetNewData"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/NewData_text"
        android:onClick="onClick"
        android:text="GetNewData" />

    <TextView
        android:id="@+id/DataString_text"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/buttonGetNewData"
        android:layout_centerHorizontal="true"
        android:text="callbackString" />
  
    <Button
        android:id="@+id/buttonGetDataString"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/DataString_text"
        android:onClick="onClick"
        android:text="GetDataString" />

</RelativeLayout>