Flutter开发日常问题记录

  ///递归式读取 fffa电池电量
  void recursiveReadFFFA()async{
    Future.delayed(Duration(seconds: 1),()async{
      List<int>? res;
      ///一定要try catch，否则一旦有异常，递归就会终止
      try{
        res = await observeCharacteristic?.read();
      }catch(e){
        print('BlueToothLogic.recursiveReadFFFA e:${e.toString()}');
      }

      if(res?[0] != null){
        isCharging.value = res![0];
      }
      if(res?[2] != null){
        batteryLevel.value = res![2];
      }
      int? highHex = res?[3];
      int? lowHex = res?[4];
      if(highHex != null && lowHex != null){
        timeStarted.value = highHex* 255 + lowHex;
        fffaList.value = res ?? [];
      }

      recursiveReadFFFA();
    });
  }

Flutter 打包 android端 apk 【终端生成签名文件上传Google Play】
https://juejin.cn/post/6944000831465193480