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。