Android如何根据我在sqlite数据库中设置的时间设置闹钟？

Question

我有一个应用程序从Web服务接收数据称为任务，任务然后保存到我的SQLite数据库。我接下来要做的是查询这些任务，然后根据设置为触发的时间设置一个警报。比方说，我有一个任务名称“feed”，任务的触发时间是'09:00 AM'（我使用'h：i'格式）。我怎样才能把这个时间格式转换成可以被alarmManager读取的东西？

public void setAlarm(int uniqueid, int duration) { 
    Intent intent = new Intent(this, AlarmReceiver.class); 
    intent.setAction(AlarmReceiver.ACTION_ALARM_RECEIVER);//my custom string action name 
    PendingIntent pendingIntent = PendingIntent.getBroadcast(this, uniqueid, intent, 0); 
    AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE); 

    alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() 
      + (duration * 1000), pendingIntent); 
    Toast.makeText(this, "Alarm set for " + uniqueid, Toast.LENGTH_LONG).show(); 
} 

Answer 1

试试这个，看看它是否适合你

Date mDate = new Date(); 
Calendar mCalendar = Calendar.getInstance(); 
mCalendar.setTime(mDate); 
mCalendar.add(Calendar.MINUTE, 2); 

long alarmInTwoMinutes = mCalendar.getTimeInMillis(); 

alarmManager.set(AlarmManager.RTC_WAKEUP, alarmInTwoMinutes, pendingIntent); 

更新在特定的时间

Calendar calendar = Calendar.getInstance(); 
calendar.setTimeInMillis(System.currentTimeMillis()); 
calendar.set(Calendar.HOUR_OF_DAY, 9); 
calendar.set(Calendar.MINUTE, 30); 

long alarmInTwoMinutes = calendar.getTimeInMillis(); 

对于重复设置，您可以使用

alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, alarmInTwoMinutes, pendingIntent) 

Answer 2

String date_string = "09:00 AM"; 
SimpleDateFormat sdf = new SimpleDateFormat("hh:mm a"); 
try { 
    Date date = sdf.parse(date_string); 
    long milliseconds = date.getTime(); 
} catch (ParseException e) { 
    e.printStackTrace(); 
} 

---

使用毫秒。