cronStock() async {     _stockCode = _stockCodeController.value.text;     _growRate = _growRateController.value.text;     _reduceRate = _reduceRateController.value.text;      ……      saveData();     refreshStock(true);      await AndroidAlarmManager.periodic(const Duration(seconds: 30), periodicAlarmID, refreshStock, wakeup: true); }  saveData() async {     SharedPreferences prefs = await SharedPreferences.getInstance();     prefs.reload();     try {         print('0001 saveData: '+DateTime.now().toString());         prefs.setString('stock_prefix', stockPrefix);         prefs.setString('stock_code', _stockCodeController.value.text);         prefs.setDouble('grow_rate', double.parse(_growRateController.value.text));         prefs.setDouble('reduce_rate', double.parse(_reduceRateController.value.text));     } on FormatException catch(e) {      } catch (e) {         // No specified type, handles all     } }  ……  refreshStock([bool isManual = false]) {     print('0002 refreshStock afterTimer: '+DateTime.now().toString());      Future<List> stockShared = getShared();     stockShared.then((List shared) {          print('isManual: $isManual');         print('shareData: $shared');              }); }  Future<List> getShared() async {     print('getShared');     SharedPreferences prefs = await SharedPreferences.getInstance();     prefs.reload();     return [         prefs.getString('stock_prefix'),         prefs.getString('stock_name'),         prefs.getString('stock_code'),         prefs.getDouble('grow_rate'),         prefs.getDouble('reduce_rate'),          // 当前值         prefs.getString('stock_price'),         prefs.getDouble('stock_rate'),         prefs.getInt('rate_color'),     ]; } 

AndroidAlarmManager 插件用到了 Isolate 环境，在 Isolate 环境下 refreshStock 函数中的 getShared()拿到的 SharedPreferences 数和上面 saveData()存储的数据不同步，要多次间隔调用的后才会同步到。

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