modifyrecordform.java

本光盘是《J2ME无线移动游戏开发》一书的配套光盘

package ch12;

import javax.microedition.lcdui.*;

public class ModifyRecordForm
    extends Form
    implements CommandListener {
  //声明一个Display对象
  private Display display;

  //声明一个Displayable对象承载父窗体
  private Displayable parent;

  //声明一个代表记录中姓名的文本域TextField
  private TextField nameTextField;

  //声明一个代表记录中积分的文本域TextField
  private TextField scoreTextField;

  //声明一个代表记录中排名的文本域TextField
  private TextField rankTextField;

  //声明一个代表记录中日期的文本域TextField
  private TextField dateTextField;

  //声明一个返回上一级窗体按钮Command对象
  private Command backCommand;

  //声明一个确认按钮Command对象
  private Command okCommand;

  //声明一个代表记录ID号的StringItem
  private StringItem idStringItem;

  /*
    1.构造器
   */
  public ModifyRecordForm(Display d, Displayable p, int id, String name,
                          String score, String rank, String date) {
    super("修改信息");
    display = d;
    parent = p;

    idStringItem = new StringItem("ID 号码", id + "");
    nameTextField = new TextField("姓名", name, 30, TextField.ANY);
    scoreTextField = new TextField("积分", score, 16, TextField.NUMERIC);
    rankTextField = new TextField("名次", rank, 16, TextField.NUMERIC);
    dateTextField = new TextField("日期", date, 16, TextField.ANY);

    append(idStringItem);
    append(nameTextField);
    append(scoreTextField);
    append(rankTextField);
    append(dateTextField);

    backCommand = new Command("返回", Command.BACK, 1);
    okCommand = new Command("确认", Command.OK, 1);
    addCommand(backCommand);
    addCommand(okCommand);
    setCommandListener(this);
  }

  /*
   2.响应按钮事件
   */
  public void commandAction(Command c, Displayable s) {
    if (c == backCommand) {
      display.setCurrent(parent);
    }
    else {
      RecordDB rdb = new RecordDB();
      int _id = Integer.parseInt( (idStringItem.getText()));
      String _name = nameTextField.getString();
      String _score = scoreTextField.getString();
      String _rank = rankTextField.getString();
      String _date = dateTextField.getString();
      rdb.modifyRecord(_id, _name, _score, _rank, _date);
      rdb.closeRS();
      display.setCurrent(parent);
    }
  }
}