listtest.java

java手机程序开发光盘源码（第五章）

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

public class ListTest extends MIDlet implements CommandListener{

	Display display;
	List imList,exList,muList;
	Command exitCmd, backCmd;

	public ListTest(){
		imList = new List("选择一个List",List.IMPLICIT);
		exList = new List("选择一个项目",List.EXCLUSIVE);
		muList = new List("选择多个项目",List.MULTIPLE);
		exitCmd = new Command("退出",Command.EXIT,1);
		backCmd = new Command("返回",Command.BACK,1);

		imList.append("EXCLUSIVE",null);
		imList.append("MULTIPLE",null);
		imList.setCommandListener(this);
		imList.addCommand(exitCmd);

		exList.append("项目1",null);
		exList.append("项目2",null);
		exList.append("项目3",null);
		exList.setCommandListener(this);
		exList.addCommand(exitCmd);
		exList.addCommand(backCmd);

		muList.append("项目1",null);
		muList.append("项目2",null);
		muList.append("项目3",null);
		muList.setCommandListener(this);
		muList.addCommand(backCmd);
		muList.addCommand(exitCmd);

	}


	public void startApp(){
		display = Display.getDisplay(this);
		display.setCurrent(imList);

	}

	public void pauseApp(){
	}

	public void destroyApp(boolean unconditional){
	}

	public void commandAction(Command c, Displayable d){

		if(c == List.SELECT_COMMAND){
			switch(imList.getSelectedIndex()){
				case 0:
					display.setCurrent(exList);
					break;
				case 1:
					display.setCurrent(muList);
					break;
			}

		}
		else if(c == backCmd){

			List currentList = (List)display.getCurrent();
			int size = currentList.size();
			boolean[] selectedArray = new boolean[size];
			currentList.getSelectedFlags(selectedArray);
			for(int i=0;i<selectedArray.length;i++){
				if(selectedArray[i]){
					if(currentList == exList)
						System.out.println("EXCLUSIVE:Item"+i+" is selected!");
					else if(currentList == muList)
						System.out.println("MULTIPLE:Item"+i+" is selected!");
				}
			}
			display.setCurrent(imList);
		}
		else if(c == exitCmd){

			destroyApp(false);
			notifyDestroyed();

		}
	}
}