BlackBerry使用闹铃定时器实现提醒功能

本示例代码使用BlackBerry的闹铃定时器API实现了一个提醒功能，可以在特定时间触发提醒，并在屏幕上显示提醒信息。

import net.rim.device.api.ui.*;
import net.rim.device.api.ui.component.*;
import net.rim.device.api.ui.container.*;
import net.rim.device.api.util.*;

public class Reminder extends UiApplication {

    private static final long REMINDER_TIME = 1000 * 60 * 5;    //5分钟后触发提醒
    private static final int REMINDER_ID = 1234;   //提醒ID
    private static Reminder reminder;

    public static void main(String[] args) {
        reminder = new Reminder();
        reminder.enterEventDispatcher();
    }

    public Reminder() {
        ReminderTask reminderTask = new ReminderTask();
        Timer reminderTimer = new Timer();
        reminderTimer.scheduleAtFixedRate(reminderTask, REMINDER_TIME, REMINDER_TIME);
    }

    private class ReminderTask extends TimerTask {
        public void run() {
            String message = "该去喝水了！";
            ApplicationDescriptor current = ApplicationDescriptor.currentApplicationDescriptor();
            ApplicationDescriptor desc = new ApplicationDescriptor(current, null);
            ApplicationManager.getApplicationManager().postGlobalEvent(REMINDER_ID, 0, 0, desc);

            Dialog.alert(message);
        }
    }
}

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