searchform.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 SearchForm
    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;

  //声明一个接收查询关键字的文本域对象
  private TextField aTextField;

  //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;

  //声明一个代表记录详细信息的窗体对象
  private RecordInfoForm detailInfo;

  //声明一个代表搜索类型的变量
  private int searchType;

  /*
    1.构造器
   */
  public SearchForm(Display d, Displayable p, String title, int type) {
    super("查询记录");
    display = d;
    parent = p;

    searchType = type;
    if (searchType == 1) {
      aTextField = new TextField("输入姓名", "", 8, TextField.ANY);
    }
    else {
      aTextField = new TextField("输入ID号码", "", 2, TextField.NUMERIC);
    }
    append(aTextField);

    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 {
      Record record;
      RecordDB rdb = new RecordDB();
      if (searchType == 1) {
        record = rdb.getRecord(aTextField.getString());
      }
      else {
        record = rdb.getRecord(Integer.parseInt(aTextField.getString()));
      }
      if (record.getID() < 10) {
        detailInfo = new RecordInfoForm(display, parent,
                                        "0" + record.getID() + "|" +
                                        record.getName());
      }
      else {
        detailInfo = new RecordInfoForm(display, parent,
                                        record.getID() + "|" + record.getName());
      }
      display.setCurrent(detailInfo);
    }
  }
}