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MidpStub.java
资源名称：J2ME&Game.rar　[点击查看]
上传用户：gyyuli
上传日期：2013-07-09
资源大小：3050k
文件大小：4k
源码类别：

J2ME

开发平台：

Java

MidpStub.java：源码内容
  3. import javax.microedition.midlet.MIDlet;
  4. import javax.microedition.lcdui.*;
  6. public class MidpStub extends MIDlet implements CommandListener
  7. {
  8.     private ExampleCanvas iCanvas;
  9.     private final static Command iOkCommand = new Command("Ok", Command.OK, 1);
  10.     private final static Command iExitCommand = new Command ("Exit", Command.EXIT, 1);
  11.     private List        iSelList;
  12.     private Display     iDisplay;
  13.     private Alert       iError;
  14.     private boolean firstTime;
  15.     
  16.     public MidpStub()
  17.     {    
  18.         String[] EXAMPLE_STRINGS = {"1", "2", "3", "4", "5", "6", "7", "8", "9"};
  19.         iSelList = new List("Select Example", ChoiceGroup.IMPLICIT, EXAMPLE_STRINGS, (Image[])null);
  20.         iSelList.addCommand(iOkCommand);
  21.         iSelList.addCommand(iExitCommand);
  22.         
  23.         iDisplay = Display.getDisplay(this);
  24.         iError = new Alert("M3G Examples", 
  25.                            "",
  26.                            null,
  27.                            AlertType.ERROR);
  28.         iError.setTimeout(Alert.FOREVER);
  29.         firstTime = true;
  30.     }
  32.     protected void startApp()
  33.     {
  34.         if (firstTime)
  35.         {
  36.             
  37.             iSelList.setCommandListener(this);
  38.             iDisplay.setCurrent(iSelList);
  39.             firstTime = false;
  40.         }
  41.     }
  43.     public void commandAction(Command aCommand, Displayable aDisp)
  44.     {
  45.         
  46.         if (aCommand == iOkCommand && aDisp == iSelList)
  47.         {
  48.             int selIndex = iSelList.getSelectedIndex();
  49.             
  50.             try 
  51.             {
  52.                 Class exampleClass = Class.forName("Example" + iSelList.getString(selIndex));
  53.                 ExampleBase example = (ExampleBase)exampleClass.newInstance();
  54.                 example.setPlatformServices(new MidpPlatformServices());
  55.                 if (iCanvas != null) iCanvas.stopAndWait();
  56.                 iCanvas = new ExampleCanvas(example);               
  57.                 iCanvas.setCommandListener(this);
  58.                 iCanvas.addCommand(iExitCommand);
  59.                 iDisplay.setCurrent(iCanvas);
  60.             }
  61.             catch (ClassNotFoundException notFound)
  62.             {
  63.                 Displayable temp = iDisplay.getCurrent();
  64.                 iError.setString("Example" + (selIndex+1) + " not found");
  65.                 if (iCanvas != null) iCanvas.stopAndWait();
  66.                 iDisplay.setCurrent(iError, temp);
  67.             }
  68.             catch (Exception e)
  69.             {
  70.                 Displayable temp = iDisplay.getCurrent();
  71.                 iError.setString("Unknown error (" + e.getMessage() +")");
  72.                 if (iCanvas != null) iCanvas.stopAndWait();
  73.                 iDisplay.setCurrent(iError, temp);              
  74.             }
  76.         }
  77.         else if (aCommand == iExitCommand && aDisp == iCanvas)
  78.         {   
  79.             iDisplay.setCurrent(iSelList);
  80.         }
  81.         else if (aCommand == iExitCommand && aDisp == iSelList)
  82.         {
  83.             if (iCanvas != null) iCanvas.stopAndWait();
  84.             notifyDestroyed();
  85.         }   
  86.     }
  88.     protected void pauseApp()
  89.     {
  90.         // Here we should stop the constant redrawing, but why bother =)
  91.     }
  93.     protected void destroyApp(boolean aUnconditional)
  94.     {
  95.         if (iCanvas != null) iCanvas.stopAndWait();
  96.     }
  98.     public static class MidpPlatformServices implements PlatformServices {
  99.         public Object loadImage(String name) {
  100.             try
  101.             {
  102.                 return Image.createImage(getResourceDir() + name);
  103.             }
  104.             catch (Exception e)
  105.             {
  106.                 e.printStackTrace();
  107.                 return null;
  108.             }
  109.         }
  110.         public String getResourceDir() {
  111.             return "/";
  112.         }
  113.     }
  114.     
  115. }