J2ME SMS : Receiving SMS in J2ME



/*
J2ME SMS
Source code example for receiving SMS in J2ME
*
* @(#)SMSReceive.java 1.11 04/03/22
*
* Copyright (c) 1999-2004 Sun Microsystems, Inc. All rights reserved.
* PROPRIETARY/CONFIDENTIAL
* Use is subject to license terms
*/

package example.sms;

import javax.microedition.midlet.*;
import javax.microedition.io.*;
import javax.microedition.lcdui.*;
import javax.wireless.messaging.*;

import java.io.IOException;

/**
* An example MIDlet displays text from an SMS MessageConnection
*/
public class SMSReceive extends MIDlet
implements CommandListener, Runnable, MessageListener {

/** user interface command for indicating Exit request. */
Command exitCommand = new Command("Exit", Command.EXIT, 2);
/** user interface command for indicating Reply request */
Command replyCommand = new Command("Reply", Command.OK, 1);
/** user interface text box for the contents of the fetched URL. */
Alert content;
/** current display. */
Display display;
/** instance of a thread for asynchronous networking and user interface. */
Thread thread;
/** Connections detected at start up. */
String[] connections;
/** Flag to signal end of processing. */
boolean done;
/** The port on which we listen for SMS messages */
String smsPort;
/** SMS message connection for inbound text messages. */
MessageConnection smsconn = null;
/** Current message read from the network. */
Message msg;
/** Address of the message's sender */
String senderAddress;
/** Alert that is displayed when replying */
Alert sendingMessageAlert;
/** Prompts for and sends the text reply */
SMSSender sender;
/** The screen to display when we return from being paused */
Displayable resumeScreen;

/**
* Initialize the MIDlet with the current display object and
* graphical components.
*/
public SMSReceive() {
smsPort = getAppProperty("SMS-Port");

display = Display.getDisplay(this);

content = new Alert("SMS Receive");
content.setTimeout(Alert.FOREVER);
content.addCommand(exitCommand);
content.setCommandListener(this);
content.setString("Receiving...");

sendingMessageAlert = new Alert("SMS", null, null, AlertType.INFO);
sendingMessageAlert.setTimeout(5000);
sendingMessageAlert.setCommandListener(this);

sender = new SMSSender(smsPort, display, content, sendingMessageAlert);

resumeScreen = content;
}

/**
* Start creates the thread to do the MessageConnection receive
* text.
* It should return immediately to keep the dispatcher
* from hanging.
*/
public void startApp() {
// SMS connection to be read.
String smsConnection = "sms://:" + smsPort;
content.setString(smsConnection);

// Open the message connection.

// if (smsconn == null) {
try {
smsconn = (MessageConnection)Connector.open(smsConnection, Connector.READ);
// smsconn.setMessageListener(this);
} catch (Throwable t) {
content.setString(t.toString());
}
// } catch (IOException ioe) {
// content.setString(ioe.toString());
// ioe.printStackTrace();
// }
// }
/*
// Initialize the text if we were started manually.
connections = PushRegistry.listConnections(true);
if (connections == null || connections.length == 0) {
content.setString("Waiting for SMS on port " + smsPort + "...");
}
done = false;
thread = new Thread(this);
thread.start();
*/
display.setCurrent(resumeScreen);
}

/**
* Notification that a message arrived.
* @param conn the connection with messages available
*/
public void notifyIncomingMessage(MessageConnection conn) {
if (thread == null) {
done = false;
thread = new Thread(this);
thread.start();
}
}

/** Message reading thread. */
public void run() {
/** Check for sms connection. */
try {
msg = smsconn.receive();
if (msg != null) {
senderAddress = msg.getAddress();
content.setTitle("From: " + senderAddress);
if (msg instanceof TextMessage) {
content.setString(((TextMessage)msg).getPayloadText());
} else {
StringBuffer buf = new StringBuffer();
byte[] data = ((BinaryMessage)msg).getPayloadData();
for (int i = 0; i < data.length; i++) { int intData = (int)data & 0xFF; if (intData < 0x10) { buf.append("0"); } buf.append(Integer.toHexString(intData)); buf.append(' '); } content.setString(buf.toString()); } content.addCommand(replyCommand); display.setCurrent(content); } } catch (IOException e) { // e.printStackTrace(); } } /** * Pause signals the thread to stop by clearing the thread field. * If stopped before done with the iterations it will * be restarted from scratch later. */ public void pauseApp() { done = true; thread = null; resumeScreen = display.getCurrent(); } /** * Destroy must cleanup everything. The thread is signaled * to stop and no result is produced. * @param unconditional true if a forced shutdown was requested */ public void destroyApp(boolean unconditional) { done = true; thread = null; if (smsconn != null) { try { smsconn.close(); } catch (IOException e) { // Ignore any errors on shutdown } } } /** * Respond to commands, including exit * @param c user interface command requested * @param s screen object initiating the request */ public void commandAction(Command c, Displayable s) { try { if (c == exitCommand || c == Alert.DISMISS_COMMAND) { destroyApp(false); notifyDestroyed(); } else if (c == replyCommand) { reply(); } } catch (Exception ex) { ex.printStackTrace(); } } /** * Allow the user to reply to the received message */ private void reply() { // remove the leading "sms://" for diplaying the destination address String address = senderAddress.substring(6); String statusMessage = "Sending message to " + address + "..."; sendingMessageAlert.setString(statusMessage); sender.promptAndSend(senderAddress); } }