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Source Code for SPPSimpleServerUI.java
001 package net.benhui.btgallery.spp;
002
003 import javax.microedition.lcdui.*;
004 import javax.bluetooth.*;
005 import javax.microedition.io.*;
006 import java.io.*;
007 import net.benhui.btgallery.*;
008
009 /**
010 *
011 * <p>Title: Example Serial Port Profile Server.</p>
012 * <p>Description: This example server only one SPP server connection
013 * and wait for a client to connect. Once a client connection accept, it read
014 * one string off the connection stream and display this string on the list GUI
015 * and wait for the next client connection again.</p>
016 * <p>Description: Important area: run() </p>
017 * @author Ben Hui (www.benhui.net)
018 * @version 1.0
019 *
020 * LICENSE:
021 * This code is licensed under GPL. (See http://www.gnu.org/copyleft/gpl.html)
022 */
023 public class SPPSimpleServerUI extends List implements Runnable
024 {
025 // Bluetooth singleton object
026 LocalDevice device;
027 DiscoveryAgent agent;
028
029 // control flag for run loop
030 // set true to exit loop
031 public boolean done = false;
032
033 // our BT server connection
034 public StreamConnectionNotifier server;
035
036 public SPPSimpleServerUI()
037 {
038 super("SPP Server", List.IMPLICIT );
039
040 addCommand( new Command("Exit", Command.SCREEN, 1 ) );
041
042 setCommandListener( SPPServerMain.instance );
043 }
044
045 /**
046 * An utility function that show a alert box that display an exception message.
047 * @param e
048 * @param next_screen
049 */
050 public void showExceptionAlert( Exception e, Screen next_screen )
051 {
052 Alert alert = new Alert( "Problem", "Exception: "+e.getClass().getName()+" "+e.getMessage(), null, AlertType.ERROR );
053 alert.setTimeout( Alert.FOREVER );
054 SPPServerMain.display.setCurrent( alert, next_screen );
055 }
056
057 public void run_server()
058 {
059 try
060 {
061 //
062 // initialize the JABWT stack
063 device = LocalDevice.getLocalDevice(); // obtain reference to singleton
064 device.setDiscoverable(DiscoveryAgent.GIAC); // set Discover mode to LIAC
065
066 // start a thread to serve the server connection.
067 // for simplicity of this demo, we only start one server thread
068 // see run() for the task of this thread
069 Thread t = new Thread( this );
070 t.start();
071
072 } catch ( BluetoothStateException e )
073 {
074 e.printStackTrace();
075 }
076
077 }
078
079 public void run()
080 {
081 // human friendly name of this service
082 String appName = "SSPServerExample";
083
084 // unique UUID for this service. this can be defined by developers
085 UUID uuid = new UUID(0xABCD);
086
087 // this is similar to 'server socket'
088 server = null;
089
090 // connection to remote device. similar to 'client socket'
091 StreamConnection c = null;
092 try
093 {
094 // Create a server connection object, using a
095 // Serial Port Profile URL syntax and our specific UUID (0xABCD)
096 // and set the service name to appName
097 server = (StreamConnectionNotifier)Connector.open(
098 "btspp://localhost:" + uuid.toString() +";name="+appName);
099
100 // Retrieve the service record template
101 ServiceRecord rec = device.getRecord( server );
102
103 // populate BluetoothProfileDescriptionList using SerialPort version 1
104 DataElement e1 = new DataElement( DataElement.DATSEQ );
105 DataElement e2 = new DataElement( DataElement.DATSEQ );
106 e2.addElement( new DataElement( DataElement.UUID, new UUID(0x1101) )); // add SerialPort
107 e2.addElement( new DataElement( DataElement.INT_8, 1) ); // add Version 1
108 e1.addElement( e2 );
109 rec.setAttributeValue( 0x0009, e1 ); // add BluetoothProfileDescriptionList
110
111 // Print the service record, which already contains
112 // some default values
113 Util.printServiceRecord( rec );
114
115
116
117 } catch (Exception e)
118 {
119 e.printStackTrace();
120 showExceptionAlert( e, this );
121 return;
122
123 }
124
125 while( !done)
126 {
127 try {
128 ///////////////////////////////
129 log("local service waiting for client connection");
130
131 append("[Waiting for Msg]", null );
132
133 //
134 // start accepting client connection.
135 // This method will block until a client
136 // connected
137 c = server.acceptAndOpen();
138
139 //
140 // retrieve the remote device object
141 RemoteDevice rdev = RemoteDevice.getRemoteDevice( c );
142
143 // obtain an input stream to the remote service
144 DataInputStream in = c.openDataInputStream();
145
146 // read in a string from the string
147 String s = in.readUTF();
148 log("read in data '"+s+"'");
149
150 // display this string on GUI
151 append( s, null );
152
153 // close current connection, wait for the next one
154 c.close();
155
156
157 } catch (Exception e)
158 {
159 e.printStackTrace();
160 showExceptionAlert(e, this );
161 return;
162
163 }
164
165 }
166
167 }
168
169 public void log( String s )
170 {
171 System.out.println( s );
172 }
173
174 } |
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