screensaver.java

画布实现屏幕保护程序

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

public  class ScreenSaver extends MIDlet {
       private Display  display;
       private Timer timer;
       private LinesTimerTask task;
       private ScreenSaverCanvas canvas;
       public ScreenSaver(){
         display = Display.getDisplay(this);
         timer = new Timer();
         canvas = new ScreenSaverCanvas(this);
         task = new LinesTimerTask(canvas);
         timer.schedule(task,0,500);
       }
       protected void startApp(){
          display.setCurrent(canvas);

       }
       protected void pauseApp(){

       }

       protected void  destroyApp (boolean b){

       }

       public void exitMIDlet(){
          destroyApp(true);
          notifyDestroyed();

       }


}