imageitemanimationdemo.java~21~

J2ME高级用户界面的学习代码

//ImageItemAnimationDemo.java

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

public class ImageItemAnimationDemo extends MIDlet implements CommandListener
{
  private final static Command cmdExit = new Command("Exit",Command.EXIT,1);
  private Display display;
  private Form form;
  private Image[] images;
  private ImageItemAnimationRunnable mAniImageItem;

  public ImageItemAnimationDemo()
  {
    display = Display.getDisplay(this);
    form = new Form("ImageItem Demo");
    try
    {
      images = new Image[]
      {
        Image.createImage("/p1.png"),
        Image.createImage("/p2.png"),
        Image.createImage("/p3.png"),
        Image.createImage("/p4.png"),
        Image.createImage("/p5.png"),
        Image.createImage("/p6.png"),
        Image.createImage("/p7.png"),
        Image.createImage("/p8.png"),

/*   */
        Image.createImage("/p9.png"),
        Image.createImage("/p10.png"),
        Image.createImage("/p11.png"),
        Image.createImage("/p12.png"),
        Image.createImage("/p13.png"),
        Image.createImage("/p14.png"),
  //      Image.createImage("/p15.png"),
        Image.createImage("/p16.png")

      };
      mAniImageItem = new ImageItemAnimationRunnable("Image Item Animation",images,
          ImageItem.LAYOUT_CENTER|
          ImageItem.LAYOUT_NEWLINE_BEFORE|
          ImageItem.LAYOUT_NEWLINE_AFTER,
          "Animation",15);                //创建动画线程

      new Thread(mAniImageItem).start();//启动动画线程
      form.append(mAniImageItem);       //添加动画线程
    }
    catch(IOException e)
    {
      System.out.println(e);
    }
    form.addCommand(cmdExit);
    form.setCommandListener(this);
  }

  public void startApp()
  {
    display.setCurrent(form);
  }

  public void destroyApp(boolean unconditional)
  {
    if(mAniImageItem != null)
    {
      mAniImageItem.setDone();
    }
  }

  public void pauseApp(){}
  public void commandAction(Command c,Displayable d)
  {
    destroyApp(false);
    notifyDestroyed();
  }

  class ImageItemAnimationRunnable extends ImageItem implements Runnable
  {
    private boolean isRun = false;
    private Image[] images;
    private int NumofImage;
    private int index = 0;

    public ImageItemAnimationRunnable(String label,Image[] images,int layout,String altText,int NumofImage)
    {
      super(label,images[0],layout,altText);
      this.images = images;
      this.NumofImage =  NumofImage;
      new Thread(this).start();   //创建新线程,并启动
    }

    public void run()
    {
      while(!isRun)
      {
        this.setImage(images[index++]);
        if(index == NumofImage)
        {
          index = 0;
        }
        try
        {
          Thread.currentThread().sleep(800);
        }
        catch(InterruptedException err)
        {
          System.out.println(err.toString());
        }
      }
    }

    void setDone()
    {
      isRun = true;
    }
  }
}