www.pudn.com > 20049791944754.zip > SingleMIDlet.java

/* License
 * 
 * Copyright 1994-2004 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
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 *  * Redistribution of source code must retain the above copyright notice,
 *      this list of conditions and the following disclaimer.
 * 
 *  * Redistribution in binary form must reproduce the above copyright notice,
 *      this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 * 
 * Neither the name of Sun Microsystems, Inc. or the names of contributors
 * may be used to endorse or promote products derived from this software
 * without specific prior written permission.
 *  
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
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 * You acknowledge that this software is not designed, licensed or intended
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import java.io.*; 
 
import javax.microedition.midlet.*; 
import javax.microedition.lcdui.*; 
 
public class SingleMIDlet 
    extends MIDlet 
    implements CommandListener { 
  private Display mDisplay; 
  private Form mMainForm, mWaitForm; 
  private SingleWorker mWorker; 
  private Command mExitCommand, mConnectCommand, mCancelCommand; 
   
  public void startApp() { 
    mDisplay = Display.getDisplay(this); 
     
    if (mMainForm == null) { 
      mMainForm = new Form("SingleMIDlet"); 
      mMainForm.append(new StringItem("", 
          "Select Connect to make a network connection")); 
      mExitCommand = new Command("Exit", Command.EXIT, 0); 
      mConnectCommand = new Command("Connect", Command.SCREEN, 0); 
   
      mMainForm.addCommand(mExitCommand); 
      mMainForm.addCommand(mConnectCommand); 
      mMainForm.setCommandListener(this); 
       
      mWaitForm = new Form("Waiting..."); 
      mCancelCommand = new Command("Cancel", Command.CANCEL, 0); 
       
      mWaitForm.addCommand(mCancelCommand); 
      mWaitForm.setCommandListener(this); 
             
      String url = getAppProperty("NetworkThreading.URL"); 
      mWorker = new SingleWorker(this, url); 
      mWorker.start(); 
    } 
 
    mDisplay.setCurrent(mMainForm); 
  } 
   
  public void commandAction(Command c, Displayable s) { 
    if (c == mExitCommand) 
      notifyDestroyed(); 
    else if (c == mConnectCommand) { 
      mDisplay.setCurrent(mWaitForm); 
      mWorker.go(); 
    } 
    else if (c == mCancelCommand) { 
      mDisplay.setCurrent(mMainForm); 
      mWorker.cancel(); 
    } 
  } 
 
  public void pauseApp() {} 
 
  public void destroyApp(boolean unconditional) { 
    mWorker.stop(); 
  } 
   
  public void networkResponse(String s) { 
    Alert a = new Alert("Response", s, null, null); 
    a.setTimeout(Alert.FOREVER); 
    mDisplay.setCurrent(a, mMainForm); 
  } 
   
  public void networkException(IOException ioe) { 
    Alert a = new Alert("Exception", ioe.toString(), null, null); 
    a.setTimeout(Alert.FOREVER); 
    mDisplay.setCurrent(a, mMainForm); 
  } 
}