partsdialog.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)

/*
 * @(#)PartsDialog.java	1.9 04/04/19
 *
 * Copyright (c) 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms
 */

 
package example.mms;

import javax.microedition.lcdui.*;
import javax.wireless.messaging.*;
import java.io.InputStream;


public class PartsDialog implements CommandListener {
    
    /** current display. */
    
	private MMSSend mmsSend;
    private List typeList;
    
    public int counter = 0;
    
    private final static Command CMD_BACK =
	    new Command("Back", Command.BACK, 1);
    private final static Command CMD_NEXT = new Command("Next", Command.OK, 1);
    private final static Command CMD_OK = new Command("OK", Command.OK, 1);
    private final static Command CMD_CANCEL =
	    new Command("Cancel", Command.CANCEL, 1);

    /** Creates a new instance of PartsDialog */
    public PartsDialog(MMSSend mmsSend) {
		this.mmsSend = mmsSend;
        
        String[] stringArray = {"Text", "Image"};

        typeList = new List("Add Part: Type", Choice.EXCLUSIVE,
			    stringArray, null);
        typeList.addCommand(CMD_BACK);
        typeList.addCommand(CMD_NEXT);
        typeList.setCommandListener(this);
        
    }
	
	public void show() {
		mmsSend.getDisplay().setCurrent(typeList);
	}
    
    /**
     * 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_BACK) {
				mmsSend.show();
            } else if (c == CMD_NEXT) {
                if (typeList.getSelectedIndex() == 0) {
		    mmsSend.getDisplay().setCurrent(new TextDialog());
                } else {
		    mmsSend.getDisplay().setCurrent(new ImageDialog());
                }
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
    
    private class TextDialog extends Form implements CommandListener {
        private Displayable mainForm;
        private TextField text;
        
        private String mimeType = "text/plain";
        
        public TextDialog() {
            super("Add Text");
            
            text = new TextField("Text: ", null, 256, TextField.ANY);
            append(text);
            append("MIME-Type: " + mimeType);
            
            addCommand(CMD_OK);
            addCommand(CMD_CANCEL);
            setCommandListener(this);
        }
        
        public void commandAction(Command c, Displayable s) {
            try {
                if (c == CMD_OK) {
                    String encoding = "UTF-8";
                    byte[] contents = text.getString().getBytes(encoding);
                    mmsSend.getMessage().addPart(
		            new MessagePart(contents, 0, contents.length, 
					    mimeType, "id" + counter,
					    "contentLocation", encoding));
                    counter++;
					mmsSend.show();
                } else if (c == CMD_CANCEL) {
					mmsSend.show();
                }
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        }
    }
    
    private class ImageDialog extends Form implements CommandListener {
        private Displayable mainForm;
        private ChoiceGroup cg;
        
        private String mimeType = "image/png";
        private String[] resouces = {"/icons/Java.png", "/icons/Duke.png"};
        private String[] imagesNames = {"Java", "Duke"};
        
        public ImageDialog() {
            super("Add Image");
            
            cg = new ChoiceGroup("Select Image", Choice.EXCLUSIVE,
				 imagesNames, null);
            append(cg);
            
            append("MIME-Type: " + mimeType);
            
            addCommand(CMD_OK);
            addCommand(CMD_CANCEL);
            setCommandListener(this);
        }
        
        public void commandAction(Command c, Displayable s) {
            try {
                if (c == CMD_OK) {
                    int index = cg.getSelectedIndex();
                    String resouce = resouces[index];
                    InputStream is = getClass().getResourceAsStream(resouce);
                    byte[] contents = new byte[is.available()];
                    is.read(contents);
                    String contentLocation = imagesNames[index];
                    mmsSend.getMessage().addPart(
		            new MessagePart(contents, 0, contents.length, 
					    mimeType, "id" + counter,
					    contentLocation, null));
                    counter++;
					mmsSend.show();
                } else if (c == CMD_CANCEL) {
					mmsSend.show();
                }
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        }
    }
}