在 Flutter 中使用 Google fit API

如何解决在 Flutter 中使用 Google fit API

我需要我的应用从 Google Fit 读取步数。我正在使用健康 3.05 包。现在我复制了示例代码以查看它是否有效，不幸的是它无效。当然，我从这个包自述文件中完成了每一步。我设置了 OAuth2 客户端 ID，我更改了 gradle.properties 显示的内容，并在 AndroidManifest.xml 中放置了 <uses-permission android:name="android.permission.ACTIVITY_RECOGNITION"/> 。但是，在运行应用程序后，我没有获得任何权限窗口，当我单击按钮获取数据时，控制台中出现错误“未授予授权”。我应该怎么办？谢谢

这是我复制表单包示例的代码：

import 'dart:async';

import 'package:Flutter/material.dart';
import 'package:health/health.dart';

class DailyStepsScreen extends StatefulWidget {
  @override
  _DailyStepsScreenState createState() => _DailyStepsScreenState();
}

enum AppState {
  DATA_NOT_FETCHED,FETCHING_DATA,DATA_READY,NO_DATA,AUTH_NOT_GRANTED
}

class _DailyStepsScreenState extends State<DailyStepsScreen> {
  List<HealthDataPoint> _healthDataList = [];
  AppState _state = AppState.DATA_NOT_FETCHED;

  @override
  void initState() {
    super.initState();
  }


  Future<void> fetchData() async {
    /// Get everything from midnight until Now
    DateTime startDate = DateTime(2020,11,07,0);
    DateTime endDate = DateTime(2025,23,59,59);

    HealthFactory health = HealthFactory();

    /// Define the types to get.
    List<HealthDataType> types = [
      HealthDataType.STEPS,HealthDataType.WEIGHT,HealthDataType.HEIGHT,HealthDataType.BLOOD_gluCOSE,HealthDataType.disTANCE_WALKING_RUNNING,];

    setState(() => _state = AppState.FETCHING_DATA);

    /// You MUST request access to the data types before reading them
    bool accessWasGranted = await health.requestAuthorization(types);

    int steps = 0;

    if (accessWasGranted) {
      try {
        /// Fetch new data
        List<HealthDataPoint> healthData =
        await health.getHealthDataFromTypes(startDate,endDate,types);

        /// Save all the new data points
        _healthDataList.addAll(healthData);
      } catch (e) {
        print("Caught exception in getHealthDataFromTypes: $e");
      }

      /// Filter out duplicates
      _healthDataList = HealthFactory.removeDuplicates(_healthDataList);

      /// Print the results
      _healthDataList.forEach((x) {
        print("Data point: $x");
        steps += x.value.round();
      });

      print("Steps: $steps");

      /// Update the UI to display the results
      setState(() {
        _state =
        _healthDataList.isEmpty ? AppState.NO_DATA : AppState.DATA_READY;
      });
    } else {
      print("Authorization not granted");
      setState(() => _state = AppState.DATA_NOT_FETCHED);
    }
  }

  Widget _contentFetchingData() {
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,children: <Widget>[
        Container(
            padding: EdgeInsets.all(20),child: CircularProgressIndicator(
              strokeWidth: 10,)),Text('Fetching data...')
      ],);
  }

  Widget _contentDataReady() {
    return ListView.builder(
        itemCount: _healthDataList.length,itemBuilder: (_,index) {
          HealthDataPoint p = _healthDataList[index];
          return ListTile(
            title: Text("${p.typestring}: ${p.value}"),trailing: Text('${p.unitString}'),subtitle: Text('${p.dateFrom} - ${p.dateto}'),);
        });
  }

  Widget _contentNoData() {
    return Text('No Data to show');
  }

  Widget _contentNotFetched() {
    return Text('Press the download button to fetch data');
  }

  Widget _authorizationNotGranted() {
    return Text('''Authorization not given.
        For Android please check your OAUTH2 client ID is correct in Google Developer Console.
         For iOS check your permissions in Apple Health.''');
  }

  Widget _content() {
    if (_state == AppState.DATA_READY)
      return _contentDataReady();
    else if (_state == AppState.NO_DATA)
      return _contentNoData();
    else if (_state == AppState.FETCHING_DATA)
      return _contentFetchingData();
    else if (_state == AppState.AUTH_NOT_GRANTED)
      return _authorizationNotGranted();

    return _contentNotFetched();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
          appBar: AppBar(
            title: const Text('Plugin example app'),actions: <Widget>[
              IconButton(
                icon: Icon(Icons.file_download),onpressed: () {
                  fetchData();
                },)
            ],),body: Center(
            child: _content(),)
    );

  }
}

解决方法

步骤 1 使用 health: 3.0.4

第 2 步正确设置 OAuth2 客户端 ID，下载新的 google-service.json

第 3 步从 Android 10 开始，您必须添加 ACTIVITY_RECOGNITION 才能在 AndroidManifest.xml 中获得 STEP Count 权限。

<uses-permission android:name="android.permission.ACTIVITY_RECOGNITION" />

第 4 步然后使用 permission_handler 请求许可。

if (Platform.isAndroid) {
  final permissionStatus = Permission.activityRecognition.request();
  if (await permissionStatus.isDenied ||
      await permissionStatus.isPermanentlyDenied) {
    showToast(
        'activityRecognition permission required to fetch your steps count');
    return;
  }
}