mainmidlet.java

基于WINCE5.0的ARM嵌入式手机上层软件开发

/*
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 * and open the template in the editor.
 */
package PhoneBook;

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

/**
 * @author Administrator
 */
public class MainMidlet extends MIDlet implements CommandListener {

    private final static Command exitCommand = new Command("退出", Command.EXIT, 1);
    private final static Command confirmCommand = new Command("确定", Command.SCREEN, 1);
    private Display display;
    private List mainList;
    private RecordStore rs;

    public MainMidlet() {
        display = Display.getDisplay(this);
    }

    public void startApp() {
        String[] stringArray = {"添加新记录", "浏览电话簿", "查找记录", "删除记录"};
        mainList = new List("电话簿", Choice.IMPLICIT, stringArray, null);
        mainList.addCommand(exitCommand);
        mainList.addCommand(confirmCommand);
        mainList.setCommandListener(this);
        display.setCurrent(mainList);

        //打开记录集,如果不存在则创建
        try {
            rs = RecordStore.openRecordStore("MyPhoneBook", true);
        } catch (Exception e) {
            rs = null;
        }
    }

    public void pauseApp() {
    }

    public void destroyApp(boolean unconditional) {
    }

    public void commandAction(Command c, Displayable d) {
        if (d.equals(mainList)) {
            // 如果选择了确定按钮则判断选择了哪一个列表框
            if (c == List.SELECT_COMMAND || c == confirmCommand) {
                if (d.equals(mainList)) {
                    switch (((List) d).getSelectedIndex()) {
                        case 0:
                            //添加新纪录
                            NewRecordForm newRF = new NewRecordForm(BookConstant.record_added,
                                    mainList, this, rs);
                            display.setCurrent(newRF);

                            break;

                        case 1:
                            //显示电话本
                            ListRecord list = new ListRecord(BookConstant.listPhoneTitle,
                                    Choice.IMPLICIT, mainList, this, rs);
                            display.setCurrent(list);

                            break;

                        case 2:
                            FindRecord fr = new FindRecord(mainList, this, rs);
                            display.setCurrent(fr);
                            break;
                        case 3:
                            //删除记录
                            DeleteRecord dr = new DeleteRecord(mainList, this, rs);
                            display.setCurrent(dr);

                            break;
                    }
                }
            }
        }
        //如果键入退出按钮，则退出程序
        if (c == exitCommand) {
            //关闭记录文件
            try {
                rs.closeRecordStore();
                rs = null;
            } catch (Exception e) {
            }

            destroyApp(false);
            notifyDestroyed();
        }
    }
}