mmssend.java

实现 WMA 消息传送 (SMS、CBS、MMS) 的一组 MIDlet 需要：MIDP 2.0、Wireless Messaging API 2.0 (WMA 2.0)

/*
 * @(#)MMSSend.java	1.6 04/04/19
 *
 * Copyright (c) 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms
 */

package example.mms;

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

/**
 * An example MIDlet to send text via an MMS MessageConnection
 */
public class MMSSend extends MIDlet 
    implements CommandListener {

    /** user interface command for indicating Exit request. */
    private static Command CMD_EXIT  = new Command("Exit", Command.EXIT, 2);
    /** user interface command for sending the message */
    private static Command CMD_SEND = new Command("Send", Command.ITEM, 1);
    /** user interface command for adding message's part */
    private static Command CMD_ADD_PART =
	new Command("Add Part", Command.ITEM, 1);
    
    /** current display. */
    private Display display;
    /** The application-ID on which we send MMS messages */
    private String appID;
    /** Area where the user enters the subject of the message */
    private TextField subjectField;
    /** Area where the user enters the phone number to send the message to */
    private TextField destinationField;
    /** Area where the user enters the phone number to send the message to */
    private StringItem partsLabel;
    /** Error message displayed when an invalid phone number is entered */
    private Alert errorMessageAlert;
    /** Alert that is displayed when a message is being sent */
    private Alert sendingMessageAlert;
    /** The last visible screen when we paused */ 
    private Displayable resumeScreen = null;
    
    private MMSMessage message;
	
	private PartsDialog partsDialog;
    
    /**
     * Initialize the MIDlet with the current display object and
     * graphical components. 
     */
    public MMSSend() {
        appID = getAppProperty("MMS-ApplicationID");

        display = Display.getDisplay(this);

        Form mainForm = new Form("New MMS");
        
        subjectField = new TextField("Subject:", 
            null, 256, TextField.ANY);
        mainForm.append(subjectField);
                
        destinationField = new TextField("Destination Address: ", 
            "mms://", 256, TextField.ANY);
        mainForm.append(destinationField);
        
        partsLabel = new StringItem("Parts:", "0");
        mainForm.append(partsLabel);
        
        mainForm.addCommand(CMD_EXIT);
        mainForm.addCommand(CMD_SEND);
        mainForm.addCommand(CMD_ADD_PART);
        mainForm.setCommandListener(this);
        
        errorMessageAlert = new Alert("MMS", null, null, AlertType.ERROR);
        errorMessageAlert.setTimeout(5000);
    
        sendingMessageAlert = new Alert("MMS", null, null, AlertType.INFO);
        sendingMessageAlert.setTimeout(5000);
        sendingMessageAlert.setCommandListener(this);
        
        resumeScreen = mainForm;
        
        message = new MMSMessage();
    }

    /**
     * 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 == CMD_EXIT) || (c == Alert.DISMISS_COMMAND)) {
                destroyApp(false);
                notifyDestroyed();
            } else if (c == CMD_ADD_PART) {
		if (partsDialog == null) {
		    partsDialog = new PartsDialog(this);
		}
		partsDialog.show();
            } else if (c == CMD_SEND) {
                promptAndSend();
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
	
	void show() {
		partsLabel.setText(Integer.toString(partsDialog.counter));
		display.setCurrent(resumeScreen);
	}
	Display getDisplay() {
		return display;
	}
	
	MMSMessage getMessage() {
		return message;
	}
    
    /**
     * Prompt for and send the message
     */
    private void promptAndSend() {
        try {
            String address = destinationField.getString();
            message.setSubject(subjectField.getString());
            message.setDestination(address);
            String statusMessage = "Sending message to " + address + "...";
            sendingMessageAlert.setString(statusMessage);
          
            new SenderThread(message, appID).start();
        } catch (IllegalArgumentException iae) {
            errorMessageAlert.setString(iae.getMessage());
            display.setCurrent(errorMessageAlert);
        }
    }
}