警报管理器无法在正确的时间触发

Question

我的警报管理器扑朔迷离，无法在正确的时间触发。有时要迟到5分钟，有时我得把手机唤醒后才能启动。 我怎样才能使警报更加准确，并能无故障地开火。我正在使用它来获取行驶中的汽车的位置，而5分钟的故障窗口是很长的时间。

下面是我的代码。

      Future<void> _locateDriver() async {
        await AndroidAlarmManager.initialize();
        await AndroidAlarmManager.periodic(const Duration(minutes: 1), helloAlarmID,
            printLocation, wakeup: true, exact: true, rescheduleOnReboot:true).then((val) => print(val));
          ------
      }

我的android清单看起来像这样。

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<uses-permission android:name="android.permission.WAKE_LOCK"/>

<application
    android:name=".Application"
    android:label="xxxxxx"
    android:icon="@mipmap/ic_launcher"
    tools:ignore="GoogleAppIndexingWarning">

    <service
        android:name="io.flutter.plugins.androidalarmmanager.AlarmService"
        android:permission="android.permission.BIND_JOB_SERVICE"
        android:exported="false"/>
    <receiver
        android:name="io.flutter.plugins.androidalarmmanager.AlarmBroadcastReceiver"
        android:exported="false"/>
    <receiver
        android:name="io.flutter.plugins.androidalarmmanager.RebootBroadcastReceiver"
        android:enabled="false">
        <intent-filter>
            <action android:name="android.intent.action.BOOT_COMPLETED"/>
        </intent-filter>
    </receiver>

我将位置打印到mqtt的位置在这里。

  static void printLocation() async{
    Isolate.current.hashCode;
    print(await Geolocator().getCurrentPosition(desiredAccuracy: LocationAccuracy.high));
    mqttSendCoordinates(await Geolocator().getCurrentPosition(desiredAccuracy: LocationAccuracy.high));

    new Future.delayed(const Duration(seconds: 20), () async {
      print(await Geolocator().getCurrentPosition(desiredAccuracy: LocationAccuracy.high));
      mqttSendCoordinates(await Geolocator().getCurrentPosition(desiredAccuracy: LocationAccuracy.high));
    });

    new Future.delayed(const Duration(seconds: 40), () async {
      print(await Geolocator().getCurrentPosition(desiredAccuracy: LocationAccuracy.high));
      mqttSendCoordinates(await Geolocator().getCurrentPosition(desiredAccuracy: LocationAccuracy.high));
    });

  }