在整点开始服务，然后每小时重复一次

发布于 2024-12-25 21:55:30 字数 1938 浏览 2 评论 0原文

我希望在每小时开始时启动一个 IntentService，并在整点重复（下午 1:00、下午 2:00、下午 3:00 等）。

查看文档后，我相信使用 AlarmManager 来执行此操作是最佳实践。

我有一个 BootReceiver，它将首次启动应用程序，并在我的 onHandleIntent 中在重复任务后设置下一个警报（例如下面的振动）。我的问题是我无法将闹钟设置为在下一个小时前响起，我该怎么办？

为了进行测试，我在下面的代码中每 3 分钟发出一次警报

public class TimingAndControl extends IntentService
{ public TimingAndControl()
{
super(TimingAndControl.class.getSimpleName());
}

@Override
protected void onHandleIntent(Intent intent)
{  
  PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
  PowerManager.WakeLock wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK |       PowerManager.ACQUIRE_CAUSES_WAKEUP, "VibrateTag");
  wakeLock.acquire();

  Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);

  v.vibrate(300);

  NextAlarm();
}

private void NextAlarm()
{
Intent intent = new Intent(this, this.getClass());
PendingIntent pendingIntent =
    PendingIntent.getService(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);

// The update frequency should often be user configurable.  This is not.

long currentTimeMillis = System.currentTimeMillis();
long nextUpdateTimeMillis = currentTimeMillis + 3 * (60 * 1000);
Time nextUpdateTime = new Time();
nextUpdateTime.set(nextUpdateTimeMillis);

if (nextUpdateTime.hour < 6 || nextUpdateTime.hour >= 18)
{
  nextUpdateTime.hour = 8;
  nextUpdateTime.minute = 0;
  nextUpdateTime.second = 0;
  nextUpdateTimeMillis = nextUpdateTime.toMillis(false) + DateUtils.DAY_IN_MILLIS;
}
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC, nextUpdateTimeMillis, pendingIntent);
}
@Override
public void onCreate(){
    Toast.makeText(this, "service starting", (10 * 1000)).show();
    super.onCreate();

}

@Override
public void onDestroy() {
  Toast.makeText(this, "service stopping", (10 * 1000)).show();
  super.onDestroy();
} 



}

原文

I'm looking to start a IntentService at the start of every hour repeating exactly on the hour (1:00PM, 2:00PM, 3:00PM, etc.).

Having looked at the documentation, I believe using AlarmManager to do this is the best practice.

I have a BootReceiver which will start the application for the first instance and below in my onHandleIntent the next alarm is set after the task has been repeated(For example vibration below). My problem is that I am unable to set the alarm to go off at the top of the next hour, how would I go about this?

For testing I have the alarm going off every 3 minutes in the code below

public class TimingAndControl extends IntentService
{ public TimingAndControl()
{
super(TimingAndControl.class.getSimpleName());
}

@Override
protected void onHandleIntent(Intent intent)
{  
  PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
  PowerManager.WakeLock wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK |       PowerManager.ACQUIRE_CAUSES_WAKEUP, "VibrateTag");
  wakeLock.acquire();

  Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);

  v.vibrate(300);

  NextAlarm();
}

private void NextAlarm()
{
Intent intent = new Intent(this, this.getClass());
PendingIntent pendingIntent =
    PendingIntent.getService(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);

// The update frequency should often be user configurable.  This is not.

long currentTimeMillis = System.currentTimeMillis();
long nextUpdateTimeMillis = currentTimeMillis + 3 * (60 * 1000);
Time nextUpdateTime = new Time();
nextUpdateTime.set(nextUpdateTimeMillis);

if (nextUpdateTime.hour < 6 || nextUpdateTime.hour >= 18)
{
  nextUpdateTime.hour = 8;
  nextUpdateTime.minute = 0;
  nextUpdateTime.second = 0;
  nextUpdateTimeMillis = nextUpdateTime.toMillis(false) + DateUtils.DAY_IN_MILLIS;
}
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC, nextUpdateTimeMillis, pendingIntent);
}
@Override
public void onCreate(){
    Toast.makeText(this, "service starting", (10 * 1000)).show();
    super.onCreate();

}

@Override
public void onDestroy() {
  Toast.makeText(this, "service stopping", (10 * 1000)).show();
  super.onDestroy();
} 



}

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鸩远一方 2025-01-01 21:55:31

您是否尝试过 RTC_WAKEUP ，RTC 标志仅在设备从睡眠状态唤醒后才会触发警报。

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撩发小公举 2025-01-01 21:55:31

您可以使用这样的代码找到下一小时的 UTC 毫秒时间（未测试）

public static final long utcMillisNextHour() {
    Time t = new Time();
    t.setToNow();
    t.hour++;
    t.minute = 0;
    t.second = 0;
    return t.normalize(true);
}

然后您可以使用 AlarmManager 的 setReapting..() 方法之一，其时间类型接受 UTC 时间和 INTERVAL_HOUR 间隔。如果您发送的意图是固定的，多次调用它并没有什么坏处，因为每个 setRepeating() 都会删除以前的意图。

You can find the UTC millisecond time of next hour with code like this (not tested)

public static final long utcMillisNextHour() {
    Time t = new Time();
    t.setToNow();
    t.hour++;
    t.minute = 0;
    t.second = 0;
    return t.normalize(true);
}

Then you can use one of the setReapting..() method of AlarmManager with time type that accepts UTC time and a INTERVAL_HOUR interval. If the intent you are sending is fixed, not harm in calling it multiple time as each setRepeating() will delete the previous ones.

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