color_chooser_midlet.java

来自「本光盘是《J2ME无线移动游戏开发》一书的配套光盘」· Java 代码 · 共 55 行

package ch06;

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

public class Color_Chooser_MIDlet
    extends MIDlet
    implements CommandListener {

  //声明一个Display对象
  private Display display;

  //声明一个实现绘制的Canvas类对象
  private Color_Chooser_Canvas chooser;

  //声明一个退出按钮
  private Command exitCommand = new Command("退出", Command.EXIT, 1);

  /*
   1.构造器
   */
  public Color_Chooser_MIDlet() {
    display = Display.getDisplay(this);
    chooser = new Color_Chooser_Canvas();
    display.setCurrent(chooser);

    chooser.addCommand(exitCommand);
    chooser.setCommandListener(this);

    chooser.setColor(0xffff00);
  }

  //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) {
  }

  /*
   2.响应按钮事件
   */
  public void commandAction(Command c, Displayable s) {
    if (c == exitCommand) {
      destroyApp(true);
      notifyDestroyed();
    }
  }
}