import javax.microedition.io.*;
import javax.microedition.lcdui.*;
import javax.wireless.messaging.*;
import java.io.IOException;
public class SMSSender
implements CommandListener, Runnable {
/** user interface command for indicating Send request */
Command sendCommand = new Command("Send", Command.OK, 1);
/** user interface command for going back to the previous screen */
Command backCommand = new Command("Back", Command.BACK, 2);
/** Display to use. */
Display display;
/** The port on which we send SMS messages */
String smsPort;
/** The URL to send the message to */
String destinationAddress;
/** Area where the user enters a message to send */
TextBox messageBox;
/** Where to return if the user hits "Back" */
Displayable backScreen;
/** Displayed when a message is being sent */
Displayable sendingScreen;
/**
* Initialize the MIDlet with the current display object and
* graphical components.
*/
public SMSSender(String smsPort, Display display,
Displayable backScreen, Displayable sendingScreen) {
this.smsPort = smsPort;
this.display = display;
this.destinationAddress = null;
this.backScreen = backScreen;
this.sendingScreen = sendingScreen;
messageBox = new TextBox("Enter Message", null, 65535, TextField.ANY);
messageBox.addCommand(backCommand);
messageBox.addCommand(sendCommand);
messageBox.setCommandListener(this);
}
/**
* Prompt for message and send it
*/
public void promptAndSend(String destinationAddress)
{
this.destinationAddress = destinationAddress;
display.setCurrent(messageBox);
}
/**
* 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 == backCommand) {
display.setCurrent(backScreen);
} else if (c == sendCommand) {
display.setCurrent(sendingScreen);
new Thread(this).start();
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
/**
* Send the message. Called on a separate thread so we don't have
* contention for the display
*/
public void run() {
String address = destinationAddress + ":" + smsPort;
MessageConnection smsconn = null;
try {
/** Open the message connection. */
smsconn = (MessageConnection)Connector.open(address);
TextMessage txtmessage = (TextMessage)smsconn.newMessage(
MessageConnection.TEXT_MESSAGE);
txtmessage.setAddress(address);
txtmessage.setPayloadText(messageBox.getString());
smsconn.send(txtmessage);
} catch (Throwable t) {
System.out.println("Send caught: ");
t.printStackTrace();
}
if (smsconn != null) {
try {
smsconn.close();
} catch (IOException ioe) {
System.out.println("Closing connection caught: ");
ioe.printStackTrace();
}
}
}
}
interface
SMSSend.java
import javax.microedition.midlet.*;
import javax.microedition.io.*;
import javax.microedition.lcdui.*;
import javax.wireless.messaging.*;
import java.io.IOException;
/**
* An example MIDlet to send text via an SMS MessageConnection
*/
public class SMSSend extends MIDlet
implements CommandListener {
/** user interface command for indicating Exit request. */
Command exitCommand = new Command("Exit", Command.EXIT, 2);
/** user interface command for proceeding to the next screen */
Command okCommand = new Command("OK", Command.OK, 1);
/** current display. */
Display display;
/** The port on which we send SMS messages */
String smsPort;
/** Area where the user enters the phone number to send the message to */
TextBox destinationAddressBox;
/** Error message displayed when an invalid phone number is entered */
Alert errorMessageAlert;
/** Alert that is displayed when a message is being sent */
Alert sendingMessageAlert;
/** Prompts for and sends the text message */
SMSSender sender;
/** The last visible screen when we paused */
Displayable resumeScreen = null;
/**
* Initialize the MIDlet with the current display object and
* graphical components.
*/
public SMSSend() {
smsPort = getAppProperty("SMS-Port");
display = Display.getDisplay(this);
destinationAddressBox = new TextBox("Destination Address?",
null, 256, TextField.PHONENUMBER);
destinationAddressBox.addCommand(exitCommand);
destinationAddressBox.addCommand(okCommand);
destinationAddressBox.setCommandListener(this);
errorMessageAlert = new Alert("SMS", null, null, AlertType.ERROR);
errorMessageAlert.setTimeout(5000);
sendingMessageAlert = new Alert("SMS", null, null, AlertType.INFO);
sendingMessageAlert.setTimeout(5000);
sendingMessageAlert.setCommandListener(this);
sender = new SMSSender(smsPort, display, destinationAddressBox,
sendingMessageAlert);
resumeScreen = destinationAddressBox;
}
/**
* startApp should return immediately to keep the dispatcher
* from hanging.
*/
public void startApp() {
display.setCurrent(resumeScreen);
}
/**
* Remember what screen is showing
*/
public void pauseApp() {
resumeScreen = display.getCurrent();
}
/**
* Destroy must cleanup everything.
* @param unconditional true if a forced shutdown was requested
*/
public void destroyApp(boolean unconditional) {
}
/**
* 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 == okCommand) {
promptAndSend();
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
/**
* Prompt for and send the message
*/
private void promptAndSend() {
String address = destinationAddressBox.getString();
if (!SMSSend.isValidPhoneNumber(address)) {
errorMessageAlert.setString("Invalid phone number");
display.setCurrent(errorMessageAlert, destinationAddressBox);
return;
}
String statusMessage = "Sending message to " + address + "...";
sendingMessageAlert.setString(statusMessage);
sender.promptAndSend("sms://" + address);
}
/**
* Check the phone number for validity
* Valid phone numbers contain only the digits 0 thru 9, and may contain
* a leading '+'.
*/
private static boolean isValidPhoneNumber(String number) {
char[] chars = number.toCharArray();
if (chars.length == 0) {
return false;
}
int startPos = 0;
// initial '+' is OK
if (chars[0] == '+') {
startPos = 1;
}
for (int i = startPos; i < chars.length; ++i) {
if (!Character.isDigit(chars)) {
return false;
}
}
return true;
}
}