thread_3.java

《精通JAVA手机游戏与应用程序设计》随书光盘

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


public class Thread_3 extends MIDlet implements CommandListener {

	private Command exitCommand,connectCommand;

	private TextBox tb;

	public Thread_3() {
		exitCommand = new Command("Exit", Command.EXIT, 1);
		connectCommand = new Command("Connect", Command.SCREEN, 1);
		tb = new TextBox("Http MIDlet", "Hello,World!", 200, 0);
		tb.addCommand(exitCommand);
		tb.addCommand(connectCommand);
		tb.setCommandListener(this);
		
	}

	protected void startApp(){		
		//直接进入网络连接状态
		//connectNetWork();
		Display.getDisplay(this).setCurrent(tb);
	}

	protected void pauseApp() {	
	}

	protected void destroyApp(boolean d){	

	}

	public void commandAction(Command c, Displayable d) {
		if (c == exitCommand) {			
			destroyApp(false);			
			notifyDestroyed();
		}
		if (c == connectCommand) {			
			Thread t = new Thread() {
		        public void run() {
		        	//进行网络连接
		        	connectNetWork();
		        }
		      };
		      t.start();

		}
			

	}
	public void connectNetWork(){
		try{
			String url = "http://127.0.0.1:8080/HelloWorld.html";
			HttpConnection hc = (HttpConnection)Connector.open(url);
			DataInputStream dis = new DataInputStream(hc.openInputStream());
			String content = "";
			int ic;
			while((ic = dis.read())!= -1){
				content = content + (char)ic;
			}
			tb.setString(content);					
			
		}catch(Exception e){
			System.out.println("error");
			e.printStackTrace();
			
		}	
		
	}

}