我写了以下程序，运行后选择Test1或Test2后按与EXI对应的键无法退出，望高人指点
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class ListEventMIDlet extends MIDlet implements CommandListener
{
private Command exitCommand;
private Command exitCommand2;
private Display display;
public ListEventMIDlet()
{
display = Display.getDisplay(this);
exitCommand = new Command("Exit",Command.EXIT,1);
exitCommand2 = new Command("Exit",Command.EXIT,1);
}
public void startApp()
{
List l = new List("Test Iten",Choice.IMPLICIT);
l.setCommandListener(this);
l.append("Test 1",null);
l.append("Test 2",null);
l.addCommand(exitCommand);
display.setCurrent(l);

}
public void pauseApp()
{
}
public void destroyApp(boolean unditional)
{
}
public void commandAction(Command c,Displayable s)
{

if (c == exitCommand)
{
notifyDestroyed();
} else
{

List tmp = (List) s;
switch(tmp.getSelectedIndex())
{
case 0:
TextBox t1= new TextBox("Test1","Test1",256,0);

t1.addCommand(exitCommand2);

display.setCurrent(t1);
break;
case 1:
TextBox t2 = new TextBox("Test2","Test2",256,0);
t2.addCommand(exitCommand2);
display.setCurrent(t2);
break;
}

}

}
}

你这样写代码吧

public void quitApp()
{
destroyApp(true);
notifyDestroyed();
}

public void commandAction(Command c,Displayable s)
{

if (c == exitCommand)
{
quitApp();

   
} else

在你的程序中虽然

notifyDestroyed();


但你没有触发
destroyApp();

而destroyApp();是Midlet必要的方法，结束Midlet

少了exitCommand.setCommandListener(this);
可以结贴了

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class ListEventMIDlet extends MIDlet implements CommandListener
{
private Command exitCommand;
private Command exitCommand2;
private Display display;
public ListEventMIDlet()
{
display = Display.getDisplay(this);
                  exitCommand = new Command("Exit", Command.EXIT,1);//加在这里
exitCommand = new Command("Exit",Command.EXIT,1);
exitCommand2 = new Command("Exit",Command.EXIT,1);
}
public void startApp()
{
List l = new List("Test Iten",Choice.IMPLICIT);
l.setCommandListener(this);
l.append("Test 1",null);
l.append("Test 2",null);
l.addCommand(exitCommand);
display.setCurrent(l);

}
public void pauseApp()
{
}
public void destroyApp(boolean unditional)
{
}
public void commandAction(Command c,Displayable s)
{

if (c == exitCommand)
{
notifyDestroyed();
} else
{

List tmp = (List) s;
switch(tmp.getSelectedIndex())
{
case 0:
TextBox t1= new TextBox("Test1","Test1",256,0);

t1.addCommand(exitCommand2);

display.setCurrent(t1);
break;
case 1:
TextBox t2 = new TextBox("Test2","Test2",256,0);
t2.addCommand(exitCommand2);
display.setCurrent(t2);
break;
}

}

}
}