popogame.java

山洞历险游戏

package popo;

import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
import java.io.*;
import javax.microedition.rms.*;
import java.util.Vector;
import java.util.Random;
import java.io.IOException;

public class popoGame extends MIDlet implements CommandListener{
  Display display;
  StartCanvas Start;
  private Alert alert;
  private Form mainForm;
  private final String GameName = "PopoName";//游戏名称

  private Command exitCommand;

  public popoGame() {
     display = Display.getDisplay(this);
     Start = new StartCanvas(this);
     mainForm = new Form(GameName);
     mainForm.append(GameName);
     exitCommand = new Command("Exit", Command.EXIT, 1);
     alert = new Alert("Warning");
  }

  public void commandAction(Command c, Displayable s) {
    if(c == exitCommand) {
      destroyApp(false);
      notifyDestroyed();
    }
  }

  public void startApp() {
    //读入图片
    display.setCurrent(mainForm);
    Vector images = new Vector(5);
    Start.reset();
    try {
      try {
        String name;
        name = "/jiemian1.png"; //start主界面
        images.addElement(createImage(name));
        name = "/jiemian2.png"; //start选择按钮
        images.addElement(createImage(name));
      } catch (IOException io_ex) {
        alert.setString("Images could not be loaded.");
       alert.setTimeout(Alert.FOREVER);
       display.setCurrent(alert);
      }
      if (images.size() > 0) {
        Start.setImages(images);
        display.setCurrent(Start);
      } else {
       alert.setString("Images could not be loaded.");
       alert.setTimeout(Alert.FOREVER);
       display.setCurrent(alert);
     }
    } catch (OutOfMemoryError err) {
      int size = images.size();
      if (size > 0) {
        images.setSize(size-1);
      }
      alert.setString("Not enough memory for all images.");
      // If no images are loaded, Alert and return to the list
      // Othersize, Alert and display the ones that were loaded.
      if (images.size() <= 0) {
        display.setCurrent(alert);
        display.setCurrent(null);
      } else {
        Start.setImages(images);
        display.setCurrent(alert);
        display.setCurrent(Start);
      }
    }
  }

  public void pauseApp() {
  }

  public void destroyApp(boolean unconditional) {
  }

  private Image createImage(String name) throws IOException {
    return Image.createImage(name);
  }
}