microtankmidlet.java

本光盘是《J2ME无线移动游戏开发》一书的配套光盘

package ch08;

import java.io.IOException;

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

public class MicroTankMIDlet
    extends MIDlet
    implements CommandListener {
  private MicroTankCanvas mMicroTankCanvas;

  public void startApp() {
    if (mMicroTankCanvas == null) {
      try {
        mMicroTankCanvas = new MicroTankCanvas();
        mMicroTankCanvas.start();
        Command exitCommand = new Command("Exit", Command.EXIT, 0);
        mMicroTankCanvas.addCommand(exitCommand);
        mMicroTankCanvas.setCommandListener(this);
      }
      catch (IOException ioe) {
        System.out.println(ioe);
      }
    }

    Display.getDisplay(this).setCurrent(mMicroTankCanvas);
  }

  public void pauseApp() {}

  public void destroyApp(boolean unconditional) {
    if (mMicroTankCanvas != null) {
      mMicroTankCanvas.stop();
    }
  }

  public void commandAction(Command c, Displayable s) {
    if (c.getCommandType() == Command.EXIT) {
      destroyApp(true);
      notifyDestroyed();
    }
  }
}