imageitem_midlet.java

本光盘是《J2ME无线移动游戏开发》一书的配套光盘

package ch04;

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

public class ImageItem_MIDlet
    extends MIDlet {
  Image image;

  //声明一个Default布局策略ImageItem对象
  ImageItem defaultImageItem;

  //声明一个Left布局策略ImageItem对象
  ImageItem leftImageItem;

  //声明一个Right布局策略ImageItem对象
  ImageItem rightImageItem;

  //声明一个Center布局策略ImageItem对象
  ImageItem centerImageItem;

  //声明一个Center After布局策略ImageItem对象
  ImageItem center_afterImageItem;

  //声明一个Center Before布局策略ImageItem对象
  ImageItem center_beforeImageItem;

  /*
      1.构造器
   */
  public ImageItem_MIDlet() {

    try {
      image = Image.createImage("/icons/background/star.png");

      defaultImageItem = new ImageItem("Default Layout",
                                       image,
                                       ImageItem.LAYOUT_DEFAULT,
                                       "Image Cannot be shown");

      leftImageItem = new ImageItem("Layout Left",
                                    image,
                                    ImageItem.LAYOUT_LEFT,
                                    "Image Cannot be shown");

      rightImageItem = new ImageItem("Layout Right",
                                     image,
                                     ImageItem.LAYOUT_RIGHT,
                                     "Image Cannot be shown");

      centerImageItem = new ImageItem("Layout Center",
                                      image,
                                      ImageItem.LAYOUT_CENTER,
                                      "Image Cannot be shown");

      center_beforeImageItem = new ImageItem("Layout Center Before",
                                             image,
                                             ImageItem.LAYOUT_CENTER |
                                             ImageItem.LAYOUT_NEWLINE_BEFORE,
                                             "Image Cannot be shown");

      center_afterImageItem = new ImageItem("Layout Center After",
                                            image,
                                            ImageItem.LAYOUT_CENTER |
                                            ImageItem.LAYOUT_NEWLINE_AFTER,
                                            "Image Cannot be shown");
    }
    catch (Exception e) {
      System.out.println(e.getMessage());
    }

    Form frm = new Form("ImageItem界面组件");
    Display display = Display.getDisplay(this);
    display.setCurrent(frm);

    frm.append(center_afterImageItem);
    frm.append(defaultImageItem);
    frm.append(leftImageItem);
    frm.append(rightImageItem);
    frm.append(centerImageItem);
    frm.append(center_beforeImageItem);

  }

  //启动应用程序
  public void startApp() {
  }

  //挂起应用程序
  public void pauseApp() {
  }

  //撤销应用程序
  public void destroyApp(boolean unconditional) {
  }

}