Hunter Krajcik

Hunter Krajcik

1655667000

A Flutter Wrapper for The HealthKitReporter Library

health_kit_reporter

Features

A Flutter wrapper for HealthKitReporter

iOS only usage, since AppleHealth is not available on Android devices.

The library supports reading, writing, observing values from HealthKit repository.

All methods from HealthKitReporter original library are wrapped in Method and Event channels provided by FlutterPlugin

Getting Started

  • Go inside pubspec.yaml file
  • Add this to your package's pubspec.yaml file:
dependencies:
     health_kit_reporter: ^1.5.2
  • Get dependencies
flutter pub get

How to use

Preparation

At first in your app's entitlements select HealthKit and in your app's info.plist file add permissions:

<key>NSHealthShareUsageDescription</key>
<string>WHY_YOU_NEED_TO_SHARE_DATA</string>
<key>NSHealthUpdateUsageDescription</key>
<string>WHY_YOU_NEED_TO_USE_DATA</string>

If you plan to use WorkoutRoute Series please provide additionally CoreLocation permissions:

<key>NSLocationAlwaysAndWhenInUseUsageDescription</key>
<string>WHY_YOU_NEED_TO_ALWAYS_SHARE_LOCATION</string>
<key>NSLocationWhenInUseUsageDescription</key>
<string>WHY_YOU_NEED_TO_SHARE_LOCATION</string>

Common usage

You simply call a HealthKitReporter methods surrounding by try catch blocks.

Warning: If Apple Health is not supported by the device (i.e. iPad) the error result will occur.

The reporter supports following operations with HealthKit:

  • accessing to permissions
  • reading data
  • writing data
  • observing data changes

If you want to read, write data or observe data changes, you always need to be sure that the data types are authorized to be read/written/observed. In that case call authorization method and await for the result telling about the presentation of the authorization window. Notice that Apple Health Kit will show this window only once during the whole time app is installed on the device, in this case if some types were denied to be read or written, user should manually allow this in Apple Health App.

Requesting permissions

As was mentioned above, you need to provide HealthKit entitlements and extend the info.plist file of your App with HealthKit permissions. (see Preparation)

Call the method: requestAuthorization

For this method you need to specify the strings identifiers of types you want to get access.

In the example, we want to read data for all QuantityTypes and write data for QuantityType.stepCount:

  void requestAuthorization() async {
    try {
      final readTypes = <String>[];
      readTypes.addAll(QuantityType.values.map((e) => e.identifier));
      final writeTypes = <String>[
        QuantityType.stepCount.identifier,
      ];
      final isRequested =
          await HealthKitReporter.requestAuthorization(readTypes, writeTypes);
      if (isRequested) {
        // read data/write data/observe data
      }
    } catch (e) {
      print(e);
    }
  }

Warning: Please keep in mind, Apple Health Kit does not let anyone to know if reading permissions were provided.

User can decline some of the reading permissions, but the result of the function will still be true. See Authorization status

Reading Data

After authorization, you can try to start reading data.

void read(bool isRequested) async {
    if (isRequested) {
      final preferredUnits =
      await HealthKitReporter.preferredUnits([QuantityType.stepCount]);
      preferredUnits.forEach((preferredUnit) async {
        print('preferredUnit: ${preferredUnit.identifier}');
        final type = QuantityTypeFactory.from(preferredUnit.identifier);
        final quantities = await HealthKitReporter.quantityQuery(
            type, preferredUnit, _predicate);
        print('quantity: ${quantities.map((e) => e.map).toList()}');
        final statistics = await HealthKitReporter.statisticsQuery(
            type, preferredUnit, _predicate);
        print('statistics: ${statistics.map}');
      });
      final characteristics = await HealthKitReporter.characteristicsQuery();
      print('characteristics: ${characteristics.map}');
      final categories = await HealthKitReporter.categoryQuery(
          CategoryType.sleepAnalysis, _predicate);
      print('categories: ${categories.map((e) => e.map).toList()}');
      final samples = await HealthKitReporter.sampleQuery(
          QuantityType.stepCount.identifier, _predicate);
      print('samples: ${samples.map((e) => e.map).toList()}');
      final sources = await HealthKitReporter.sourceQuery(
          QuantityType.stepCount.identifier, _predicate);
      print('sources: ${sources.map((e) => e.map).toList()}');
      final correlations = await HealthKitReporter.correlationQuery(
          CorrelationType.bloodPressure.identifier, _predicate);
      print('correlations: ${correlations.map((e) => e.map).toList()}');
    } else {
      print('error isRequested: $isRequested');
    }
  }

In the example above, there is a call of preferredUnits function. You can provide identifiers to get preferred units for them and eventually receive properly calculated values from queries. The units will be chosen automatically based on you current localization. This is only required for QuantityTypes. If you will try to provide invalid unit for a type, you will get an error.

The usage of sampleQuery for quantity types will return nearly the same result as quantityQuery, but the units for the values will be used according to SI, while quantityQuery together with preferredUnits will handle values units according to thee current localization.

Writing Data

Before writing data, you may need to check if writing is allowed by calling isAuthorizedToWrite.

If it is ok to write, you need to create a Sample object and call a save method.

final _device = Device(
    'FlutterTracker',
    'kvs',
    'T-800',
    '3',
    '3.0',
    '1.1.1',
    'kvs.sample.app',
    '444-888-555',
  );
final _source = Source(
    'myApp',
    'com.kvs.health_kit_reporter_example',
  );
final _operatingSystem = OperatingSystem(
    1,
    2,
    3,
  );

SourceRevision get _sourceRevision => SourceRevision(
    _source,
   '5',
   'fit',
   '4',
   _operatingSystem,
  );

void saveSteps() async {
  try {
    final canWrite = await HealthKitReporter.isAuthorizedToWrite(
        QuantityType.stepCount.identifier);
    if (canWrite) {
      final now = DateTime.now();
      final minuteAgo = now.add(Duration(minutes: -1));
      final harmonized = QuantityHarmonized(100, 'count', null);
      final steps = Quantity(
          'testStepsUUID',
          QuantityType.stepCount.identifier,
          minuteAgo.millisecondsSinceEpoch,
          now.millisecondsSinceEpoch,
          _device,
          _sourceRevision,
          harmonized);
      print('try to save: ${steps.map}');
      final saved = await HealthKitReporter.save(steps);
      print('stepsSaved: $saved');
    } else {
      print('error canWrite steps: $canWrite');
    }
  } catch (e) {
    print(e);
  }
}

Recommendation: As well as for reading, here will better as well to call preferredUnits first, to know what unit is valid for a type. Please see HKUnit.init

Warning: PLease be sure to provide valid values for the appropriate types. For example, HealthKit will not allow to save Quantity value for the QuantityType.stepCount if the value is 0

Observing Data

If you want to know, that something was changed in HealthKit, you can observe the repository.

Try simple observerQuery to get notifications if something is changed.

This call is a subscription for EventChannel of the plugin, so don't forget to cancel it as soon as you don't need it anymore.

  void observerQuery() async {
    final identifier = QuantityType.stepCount.identifier;
    final sub = HealthKitReporter.observerQuery(identifier, _predicate,
        onUpdate: (identifier) async {
      print('Updates for observerQuerySub');
      print(identifier);
    });
    print('observerQuerySub: $sub');
    final isSet = await HealthKitReporter.enableBackgroundDelivery(
        identifier, UpdateFrequency.immediate);
    print('enableBackgroundDelivery: $isSet');
  }

According to Observing Query and Background Delivery you might create an App which will be called every time by HealthKit, even if the app is in background, to notify, that some data was changed in HealthKit depending on frequency. But keep in mind that sometimes the desired frequency you set cannot be fulfilled by HealthKit.

To receive notifications when the app is killed by the system or in background:

  • provide an additional capability Background Mode and select Background fetch
  • with calling observerQuery, you need to call enableBackgroundDelivery function as well

As a recommendation set up the subscription inside initState or build methods of your widget or as more preferred in main function of your app.

If you want to stop observation, you need to:

  • remove the subscription for observerQuery
  • call disableBackgroundDelivery or disableAllBackgroundDelivery

Requirements

The library supports minimum iOS 9. Some features like HeartbeatSeries are available only starting with iOS 13.0 and like Electrocardiogramm starting with iOS 14.0.

Installing

Use this package as a library

Depend on it

Run this command:

With Flutter:

 $ flutter pub add health_kit_reporter

This will add a line like this to your package's pubspec.yaml (and run an implicit flutter pub get):

dependencies:
  health_kit_reporter: ^2.0.4

Alternatively, your editor might support flutter pub get. Check the docs for your editor to learn more.

Import it

Now in your Dart code, you can use:

import 'package:health_kit_reporter/health_kit_reporter.dart';

example/lib/main.dart

import 'dart:async';
import 'dart:convert';

import 'package:flutter/material.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart';
import 'package:health_kit_reporter/health_kit_reporter.dart';
import 'package:health_kit_reporter/model/payload/category.dart';
import 'package:health_kit_reporter/model/payload/correlation.dart';
import 'package:health_kit_reporter/model/payload/date_components.dart';
import 'package:health_kit_reporter/model/payload/device.dart';
import 'package:health_kit_reporter/model/payload/preferred_unit.dart';
import 'package:health_kit_reporter/model/payload/quantity.dart';
import 'package:health_kit_reporter/model/payload/source.dart';
import 'package:health_kit_reporter/model/payload/source_revision.dart';
import 'package:health_kit_reporter/model/payload/workout.dart';
import 'package:health_kit_reporter/model/payload/workout_activity_type.dart';
import 'package:health_kit_reporter/model/payload/workout_event.dart';
import 'package:health_kit_reporter/model/payload/workout_event_type.dart';
import 'package:health_kit_reporter/model/predicate.dart';
import 'package:health_kit_reporter/model/type/activity_summary_type.dart';
import 'package:health_kit_reporter/model/type/category_type.dart';
import 'package:health_kit_reporter/model/type/characteristic_type.dart';
import 'package:health_kit_reporter/model/type/correlation_type.dart';
import 'package:health_kit_reporter/model/type/electrocardiogram_type.dart';
import 'package:health_kit_reporter/model/type/quantity_type.dart';
import 'package:health_kit_reporter/model/type/series_type.dart';
import 'package:health_kit_reporter/model/type/workout_type.dart';
import 'package:health_kit_reporter/model/update_frequency.dart';

void main() {
  runApp(MyApp());
}

mixin HealthKitReporterMixin {
  Predicate get predicate => Predicate(
        DateTime.now().add(Duration(days: -365)),
        DateTime.now(),
      );

  Device get device => Device(
        'FlutterTracker',
        'kvs',
        'T-800',
        '3',
        '3.0',
        '1.1.1',
        'kvs.sample.app',
        '444-888-555',
      );
  Source get source => Source(
        'myApp',
        'com.kvs.health_kit_reporter_example',
      );
  OperatingSystem get operatingSystem => OperatingSystem(
        1,
        2,
        3,
      );

  SourceRevision get sourceRevision => SourceRevision(
        source,
        '5',
        'fit',
        '4',
        operatingSystem,
      );
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  final _flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin();

  @override
  void initState() {
    super.initState();
    final initializationSettingsIOs = IOSInitializationSettings();
    final initSettings = InitializationSettings(iOS: initializationSettingsIOs);
    _flutterLocalNotificationsPlugin.initialize(initSettings,
        onSelectNotification: (string) {
      print(string);
      return Future.value(string);
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: DefaultTabController(
        length: 4,
        child: Scaffold(
          appBar: AppBar(
            title: Text('Health Kit Reporter'),
            actions: [
              IconButton(
                onPressed: () => _authorize(),
                icon: Icon(Icons.login),
                tooltip: 'Authorizes HealthKit',
              )
            ],
            bottom: TabBar(
              tabs: [
                Tab(
                  icon: Icon(Icons.book),
                  text: 'Read',
                ),
                Tab(
                  icon: Icon(Icons.edit),
                  text: 'Write',
                ),
                Tab(
                  icon: Icon(Icons.monitor),
                  text: 'Observe',
                ),
                Tab(
                  icon: Icon(Icons.delete),
                  text: 'Delete',
                ),
              ],
            ),
          ),
          body: TabBarView(
            children: [
              _ReadView(),
              _WriteView(),
              _ObserveView(
                flutterLocalNotificationsPlugin:
                    _flutterLocalNotificationsPlugin,
              ),
              _DeleteView(),
            ],
          ),
        ),
      ),
    );
  }

  Future<void> _authorize() async {
    try {
      final readTypes = <String>[];
      readTypes.addAll(ActivitySummaryType.values.map((e) => e.identifier));
      readTypes.addAll(CategoryType.values.map((e) => e.identifier));
      readTypes.addAll(CharacteristicType.values.map((e) => e.identifier));
      readTypes.addAll(QuantityType.values.map((e) => e.identifier));
      readTypes.addAll(WorkoutType.values.map((e) => e.identifier));
      readTypes.addAll(SeriesType.values.map((e) => e.identifier));
      readTypes.addAll(ElectrocardiogramType.values.map((e) => e.identifier));
      final writeTypes = <String>[
        QuantityType.stepCount.identifier,
        WorkoutType.workoutType.identifier,
        CategoryType.sleepAnalysis.identifier,
        CategoryType.mindfulSession.identifier,
        QuantityType.bloodPressureDiastolic.identifier,
        QuantityType.bloodPressureSystolic.identifier,
        //CorrelationType.bloodPressure.identifier,
      ];
      final isRequested =
          await HealthKitReporter.requestAuthorization(readTypes, writeTypes);
      print('isRequested auth: $isRequested');
    } catch (e) {
      print(e);
    }
  }
}

class _ReadView extends StatelessWidget with HealthKitReporterMixin {
  const _ReadView({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return ListView(
      children: [
        TextButton(
            onPressed: () {
              handleQuantitiySamples();
            },
            child: Text('preferredUnit:quantity:statistics')),
        TextButton(
            onPressed: () {
              queryCharacteristics();
            },
            child: Text('characteristics')),
        TextButton(
            onPressed: () {
              queryCategory();
            },
            child: Text('categories')),
        TextButton(
            onPressed: () {
              queryWorkout();
            },
            child: Text('workouts')),
        TextButton(
            onPressed: () {
              querySamples();
            },
            child: Text('samples')),
        TextButton(
            onPressed: () {
              queryHeartbeatSeries();
            },
            child: Text('heartbeatSeriesQuery')),
        TextButton(
            onPressed: () {
              workoutRouteQuery();
            },
            child: Text('workoutRouteQuery')),
        TextButton(
            onPressed: () {
              querySources();
            },
            child: Text('sources')),
        TextButton(
            onPressed: () {
              queryCorrelations();
            },
            child: Text('correlations')),
        TextButton(
            onPressed: () {
              queryElectrocardiograms();
            },
            child: Text('electrocardiograms')),
        TextButton(
            onPressed: () {
              queryActivitySummary();
            },
            child: Text('activitySummary')),
      ],
    );
  }

  void querySamples() async {
    try {
      final samples = await HealthKitReporter.sampleQuery(
          QuantityType.stepCount.identifier, predicate);
      print('samples: ${samples.map((e) => e.map).toList()}');
    } catch (e) {
      print(e);
    }
  }

  void queryCategory() async {
    try {
      final categories = await HealthKitReporter.categoryQuery(
          CategoryType.sleepAnalysis, predicate);
      print('categories: ${categories.map((e) => e.map).toList()}');
    } catch (e) {
      print(e);
    }
  }

  void queryWorkout() async {
    try {
      final workouts = await HealthKitReporter.workoutQuery(predicate);
      print('workouts: ${workouts.map((e) => e.map).toList()}');
      for (final q in workouts) {
        print('q: ${json.encode(q.map)}');
      }
    } catch (e) {
      print(e);
    }
  }

  void queryHeartbeatSeries() async {
    try {
      final series = await HealthKitReporter.heartbeatSeriesQuery(predicate);
      print('heartbeatSeries: ${series.map((e) => e.map).toList()}');
    } catch (e) {
      print(e);
    }
  }

  void workoutRouteQuery() async {
    try {
      final series = await HealthKitReporter.workoutRouteQuery(predicate);
      print('workoutRoutes: ${series.map((e) => e.map).toList()}');
    } catch (e) {
      print(e);
    }
  }

  void queryCharacteristics() async {
    try {
      final characteristics = await HealthKitReporter.characteristicsQuery();
      print('characteristics: ${characteristics.map}');
    } catch (e) {
      print(e);
    }
  }

  void handleQuantitiySamples() async {
    try {
      final preferredUnits = await HealthKitReporter.preferredUnits([
        QuantityType.stepCount,
      ]);
      preferredUnits.forEach((preferredUnit) async {
        final identifier = preferredUnit.identifier;
        final unit = preferredUnit.unit;
        print('preferredUnit: ${preferredUnit.map}');
        final type = QuantityTypeFactory.from(identifier);
        try {
          final quantities =
              await HealthKitReporter.quantityQuery(type, unit, predicate);
          print('quantity: ${quantities.map((e) => e.map).toList()}');
          final statistics =
              await HealthKitReporter.statisticsQuery(type, unit, predicate);
          print('statistics: ${statistics.map}');
        } catch (e) {
          print(e);
        }
      });
    } catch (e) {
      print(e);
    }
  }

  void queryActivitySummary() async {
    try {
      final activitySummary =
          await HealthKitReporter.queryActivitySummary(predicate);
      print('activitySummary: ${activitySummary.map((e) => e.map).toList()}');
    } catch (e) {
      print(e);
    }
  }

  void queryElectrocardiograms() async {
    try {
      final electrocardiograms = await HealthKitReporter.electrocardiogramQuery(
          predicate,
          withVoltageMeasurements: true);
      print(
          'electrocardiograms: ${electrocardiograms.map((e) => e.map).toList()}');
    } catch (e) {
      print(e);
    }
  }

  void queryCorrelations() async {
    try {
      final correlations = await HealthKitReporter.correlationQuery(
          CorrelationType.bloodPressure.identifier, predicate);
      print('correlations: ${correlations.map((e) => e.map).toList()}');
    } catch (e) {
      print(e);
    }
  }

  void querySources() async {
    try {
      final sources = await HealthKitReporter.sourceQuery(
          QuantityType.stepCount.identifier, predicate);
      print('sources: ${sources.map((e) => e.map).toList()}');
    } catch (e) {
      print(e);
    }
  }
}

class _WriteView extends StatelessWidget with HealthKitReporterMixin {
  const _WriteView({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return ListView(
      children: [
        TextButton(
          onPressed: () {
            saveWorkout();
          },
          child: Text('saveWorkout'),
        ),
        TextButton(
          onPressed: () {
            saveSteps();
          },
          child: Text('saveSteps'),
        ),
        TextButton(
          onPressed: () {
            saveMindfulMinutes();
          },
          child: Text('saveMindfulMinutes'),
        ),
        TextButton(
          onPressed: () {
            saveBloodPressureCorrelation();
          },
          child: Text('saveBloodPressureCorrelation'),
        ),
      ],
    );
  }

  void saveSteps() async {
    try {
      final canWrite = await HealthKitReporter.isAuthorizedToWrite(
          QuantityType.stepCount.identifier);
      if (canWrite) {
        final now = DateTime.now();
        final minuteAgo = now.add(Duration(minutes: -1));
        final harmonized = QuantityHarmonized(100, 'count', null);
        final steps = Quantity(
            'testStepsUUID',
            QuantityType.stepCount.identifier,
            minuteAgo.millisecondsSinceEpoch,
            now.millisecondsSinceEpoch,
            device,
            sourceRevision,
            harmonized);
        print('try to save: ${steps.map}');
        final saved = await HealthKitReporter.save(steps);
        print('stepsSaved: $saved');
      } else {
        print('error canWrite steps: $canWrite');
      }
    } catch (e) {
      print(e);
    }
  }

  void saveWorkout() async {
    try {
      final canWrite = await HealthKitReporter.isAuthorizedToWrite(
          WorkoutType.workoutType.identifier);
      if (canWrite) {
        final harmonized = WorkoutHarmonized(
          WorkoutActivityType.badminton,
          1.2,
          'kcal',
          123,
          'm',
          0,
          'count',
          0,
          'count',
          null,
        );
        final now = DateTime.now();
        final duration = 60;
        final eventHarmonized = WorkoutEventHarmonized(WorkoutEventType.pause);
        final events = [
          WorkoutEvent(
            now.millisecondsSinceEpoch,
            now.millisecondsSinceEpoch,
            duration,
            eventHarmonized,
          )
        ];
        final minuteAgo = now.add(Duration(seconds: -duration));
        final workout = Workout(
          'testWorkoutUUID',
          'basketball',
          minuteAgo.millisecondsSinceEpoch,
          now.millisecondsSinceEpoch,
          device,
          sourceRevision,
          harmonized,
          duration,
          events,
        );
        print('try to save: ${workout.map}');
        final saved = await HealthKitReporter.save(workout);
        print('workoutSaved: $saved');
      } else {
        print('error canWrite workout: $canWrite');
      }
    } catch (e) {
      print(e);
    }
  }

  void saveMindfulMinutes() async {
    try {
      final canWrite = await HealthKitReporter.isAuthorizedToWrite(
          CategoryType.mindfulSession.identifier);
      if (canWrite) {
        final now = DateTime.now();
        final minuteAgo = now.add(Duration(minutes: -1));
        final harmonized = CategoryHarmonized(
          0,
          'HKCategoryValue',
          'Not Aplicable',
          {},
        );
        final mindfulMinutes = Category(
          'testMindfulMinutesUUID',
          CategoryType.mindfulSession.identifier,
          minuteAgo.millisecondsSinceEpoch,
          now.millisecondsSinceEpoch,
          device,
          sourceRevision,
          harmonized,
        );
        print('try to save: ${mindfulMinutes.map}');
        final saved = await HealthKitReporter.save(mindfulMinutes);
        print('mindfulMinutesSaved: $saved');
      } else {
        print('error canWrite mindfulMinutes: $canWrite');
      }
    } catch (e) {
      print(e);
    }
  }

  void saveBloodPressureCorrelation() async {
    try {
      final now = DateTime.now();
      final minuteAgo = now.add(Duration(minutes: -1));
      final sys = Quantity(
          'testSysUUID234',
          QuantityType.bloodPressureSystolic.identifier,
          minuteAgo.millisecondsSinceEpoch,
          now.millisecondsSinceEpoch,
          device,
          sourceRevision,
          QuantityHarmonized(123, 'mmHg', null));
      final dia = Quantity(
          'testDiaUUID456',
          QuantityType.bloodPressureDiastolic.identifier,
          minuteAgo.millisecondsSinceEpoch,
          now.millisecondsSinceEpoch,
          device,
          sourceRevision,
          QuantityHarmonized(89, 'mmHg', null));
      final correlationJarmonized = CorrelationHarmonized([sys, dia], [], null);
      final correlation = Correlation(
          'test',
          CorrelationType.bloodPressure.identifier,
          minuteAgo.millisecondsSinceEpoch,
          now.millisecondsSinceEpoch,
          device,
          sourceRevision,
          correlationJarmonized);
      final saved = await HealthKitReporter.save(correlation);
      print('BloodPressureCorrelationSaved: $saved');
    } catch (e) {
      print(e);
    }
  }
}

class _ObserveView extends StatelessWidget with HealthKitReporterMixin {
  const _ObserveView({
    Key? key,
    required this.flutterLocalNotificationsPlugin,
  }) : super(key: key);

  final FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin;

  @override
  Widget build(BuildContext context) {
    return ListView(
      children: [
        TextButton(
            onPressed: () {
              observerQuery([
                QuantityType.stepCount.identifier,
                QuantityType.heartRate.identifier,
              ]);
            },
            child: Text('observerQuery - STEPS and HR')),
        TextButton(
            onPressed: () {
              anchoredObjectQuery([
                QuantityType.stepCount.identifier,
                QuantityType.heartRate.identifier,
              ]);
            },
            child: Text('anchoredObjectQuery - STEPS and HR')),
        TextButton(
            onPressed: () {
              queryActivitySummaryUpdates();
            },
            child: Text('queryActivitySummaryUpdates')),
        TextButton(
            onPressed: () {
              statisticsCollectionQuery();
            },
            child: Text('statisticsCollectionQuery')),
      ],
    );
  }

  void observerQuery(List<String> identifiers) async {
    try {
      final sub = HealthKitReporter.observerQuery(identifiers, null,
          onUpdate: (identifier) async {
        print('Updates for observerQuerySub - $identifier');
        print(identifier);
        final iOSDetails = IOSNotificationDetails();
        final details = NotificationDetails(iOS: iOSDetails);
        await flutterLocalNotificationsPlugin.show(
            0, 'Observer', identifier, details);
      });
      print('$identifiers observerQuerySub: $sub');
      for (final identifier in identifiers) {
        final isSet = await HealthKitReporter.enableBackgroundDelivery(
            identifier, UpdateFrequency.immediate);
        print('$identifier enableBackgroundDelivery: $isSet');
      }
    } catch (e) {
      print(e);
    }
  }

  void anchoredObjectQuery(List<String> identifiers) {
    try {
      final sub = HealthKitReporter.anchoredObjectQuery(identifiers, predicate,
          onUpdate: (samples, deletedObjects) {
        print('Updates for anchoredObjectQuerySub');
        print(samples.map((e) => e.map).toList());
        print(deletedObjects.map((e) => e.map).toList());
      });
      print('$identifiers anchoredObjectQuerySub: $sub');
    } catch (e) {
      print(e);
    }
  }

  void queryActivitySummaryUpdates() {
    try {
      final sub = HealthKitReporter.queryActivitySummaryUpdates(predicate,
          onUpdate: (samples) {
        print('Updates for activitySummaryUpdatesSub');
        print(samples.map((e) => e.map).toList());
      });
      print('activitySummaryUpdatesSub: $sub');
    } catch (e) {
      print(e);
    }
  }

  void statisticsCollectionQuery() {
    try {
      final anchorDate = DateTime.utc(2020, 2, 1, 12, 30, 30);
      final enumerateFrom = DateTime.utc(2020, 3, 1, 12, 30, 30);
      final enumerateTo = DateTime.utc(2020, 12, 31, 12, 30, 30);
      final intervalComponents = DateComponents(month: 1);
      final sub = HealthKitReporter.statisticsCollectionQuery(
        [
          PreferredUnit(
            QuantityType.stepCount.identifier,
            'count',
          ),
        ],
        predicate,
        anchorDate,
        enumerateFrom,
        enumerateTo,
        intervalComponents,
        onUpdate: (statistics) {
          print('Updates for statisticsCollectionQuerySub');
          print(statistics.map);
        },
      );
      print('statisticsCollectionQuery: $sub');
    } catch (e) {
      print(e);
    }
  }
}

class _DeleteView extends StatelessWidget with HealthKitReporterMixin {
  const _DeleteView({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return ListView(
      children: [
        TextButton(
            onPressed: () {
              deleteSteps();
            },
            child: Text('deleteSteps')),
      ],
    );
  }

  void deleteSteps() async {
    try {
      final map = await HealthKitReporter.deleteObjects(
          QuantityType.stepCount.identifier,
          Predicate(
            DateTime.now().add(Duration(days: -1)),
            DateTime.now(),
          ));
      print(map);
    } catch (e) {
      print(e);
    }
  }
}

Author: VictorKachalov
Source Code: https://github.com/VictorKachalov/health_kit_reporter 
License: MIT license

#flutter #dart #swift #ios 

What is GEEK

Buddha Community

A Flutter Wrapper for The HealthKitReporter Library

Dear Programmer

1655664799

Grocery Store App UI Design In Flutter

https://youtu.be/S_LZiS5VNKA

Destiny Volkman

Destiny Volkman

1597014000

Google's Flutter 1.20 stable announced with new features - Navoki

Flutter Google cross-platform UI framework has released a new version 1.20 stable.

Flutter is Google’s UI framework to make apps for Android, iOS, Web, Windows, Mac, Linux, and Fuchsia OS. Since the last 2 years, the flutter Framework has already achieved popularity among mobile developers to develop Android and iOS apps. In the last few releases, Flutter also added the support of making web applications and desktop applications.

Last month they introduced the support of the Linux desktop app that can be distributed through Canonical Snap Store(Snapcraft), this enables the developers to publish there Linux desktop app for their users and publish on Snap Store.  If you want to learn how to Publish Flutter Desktop app in Snap Store that here is the tutorial.

Flutter 1.20 Framework is built on Google’s made Dart programming language that is a cross-platform language providing native performance, new UI widgets, and other more features for the developer usage.

Here are the few key points of this release:

Performance improvements for Flutter and Dart

In this release, they have got multiple performance improvements in the Dart language itself. A new improvement is to reduce the app size in the release versions of the app. Another performance improvement is to reduce junk in the display of app animation by using the warm-up phase.

sksl_warm-up

If your app is junk information during the first run then the Skia Shading Language shader provides for pre-compilation as part of your app’s build. This can speed it up by more than 2x.

Added a better support of mouse cursors for web and desktop flutter app,. Now many widgets will show cursor on top of them or you can specify the type of supported cursor you want.

Autofill for mobile text fields

Autofill was already supported in native applications now its been added to the Flutter SDK. Now prefilled information stored by your OS can be used for autofill in the application. This feature will be available soon on the flutter web.

flutter_autofill

A new widget for interaction

InteractiveViewer is a new widget design for common interactions in your app like pan, zoom drag and drop for resizing the widget. Informations on this you can check more on this API documentation where you can try this widget on the DartPad. In this release, drag-drop has more features added like you can know precisely where the drop happened and get the position.

Updated Material Slider, RangeSlider, TimePicker, and DatePicker

In this new release, there are many pre-existing widgets that were updated to match the latest material guidelines, these updates include better interaction with Slider and RangeSlider, DatePicker with support for date range and time picker with the new style.

flutter_DatePicker

New pubspec.yaml format

Other than these widget updates there is some update within the project also like in pubspec.yaml file format. If you are a flutter plugin publisher then your old pubspec.yaml  is no longer supported to publish a plugin as the older format does not specify for which platform plugin you are making. All existing plugin will continue to work with flutter apps but you should make a plugin update as soon as possible.

Preview of embedded Dart DevTools in Visual Studio Code

Visual Studio code flutter extension got an update in this release. You get a preview of new features where you can analyze that Dev tools in your coding workspace. Enable this feature in your vs code by _dart.previewEmbeddedDevTools_setting. Dart DevTools menu you can choose your favorite page embed on your code workspace.

Network tracking

The updated the Dev tools comes with the network page that enables network profiling. You can track the timings and other information like status and content type of your** network calls** within your app. You can also monitor gRPC traffic.

Generate type-safe platform channels for platform interop

Pigeon is a command-line tool that will generate types of safe platform channels without adding additional dependencies. With this instead of manually matching method strings on platform channel and serializing arguments, you can invoke native class and pass nonprimitive data objects by directly calling the Dartmethod.

There is still a long list of updates in the new version of Flutter 1.2 that we cannot cover in this blog. You can get more details you can visit the official site to know more. Also, you can subscribe to the Navoki newsletter to get updates on these features and upcoming new updates and lessons. In upcoming new versions, we might see more new features and improvements.

You can get more free Flutter tutorials you can follow these courses:

#dart #developers #flutter #app developed #dart devtools in visual studio code #firebase local emulator suite in flutter #flutter autofill #flutter date picker #flutter desktop linux app build and publish on snapcraft store #flutter pigeon #flutter range slider #flutter slider #flutter time picker #flutter tutorial #flutter widget #google flutter #linux #navoki #pubspec format #setup flutter desktop on windows

Terry Tremblay

Terry Tremblay

1598396940

What is Flutter and why you should learn it?

Flutter is an open-source UI toolkit for mobile developers, so they can use it to build native-looking** Android and iOS** applications from the same code base for both platforms. Flutter is also working to make Flutter apps for Web, PWA (progressive Web-App) and Desktop platform (Windows,macOS,Linux).

flutter-mobile-desktop-web-embedded_min

Flutter was officially released in December 2018. Since then, it has gone a much stronger flutter community.

There has been much increase in flutter developers, flutter packages, youtube tutorials, blogs, flutter examples apps, official and private events, and more. Flutter is now on top software repos based and trending on GitHub.

Flutter meaning?

What is Flutter? this question comes to many new developer’s mind.

humming_bird_dart_flutter

Flutter means flying wings quickly, and lightly but obviously, this doesn’t apply in our SDK.

So Flutter was one of the companies that were acquired by **Google **for around $40 million. That company was based on providing gesture detection and recognition from a standard webcam. But later when the Flutter was going to release in alpha version for developer it’s name was Sky, but since Google already owned Flutter name, so they rename it to Flutter.

Where Flutter is used?

Flutter is used in many startup companies nowadays, and even some MNCs are also adopting Flutter as a mobile development framework. Many top famous companies are using their apps in Flutter. Some of them here are

Dream11

Dream11

NuBank

NuBank

Reflectly app

Reflectly app

Abbey Road Studios

Abbey Road Studios

and many more other apps. Mobile development companies also adopted Flutter as a service for their clients. Even I was one of them who developed flutter apps as a freelancer and later as an IT company for mobile apps.

Flutter as a service

#dart #flutter #uncategorized #flutter framework #flutter jobs #flutter language #flutter meaning #flutter meaning in hindi #google flutter #how does flutter work #what is flutter

Punith Raaj

1644991598

The Ultimate Guide To Tik Tok Clone App With Firebase - Ep 2

The Ultimate Guide To Tik Tok Clone App With Firebase - Ep 2
In this video, I'm going to show you how to make a Cool Tik Tok App a new Instagram using Flutter,firebase and visual studio code.

In this tutorial, you will learn how to Upload a Profile Pic to Firestore Data Storage.

🚀 Nice, clean and modern TikTok Clone #App #UI made in #Flutter⚠️

Starter Project : https://github.com/Punithraaj/Flutter_Tik_Tok_Clone_App/tree/Episode1

► Timestamps 
0:00 Intro 0:20 
Upload Profile Screen 
16:35 Image Picker
20:06 Image Cropper 
24:25 Firestore Data Storage Configuration.

⚠️ IMPORTANT: If you want to learn, I strongly advise you to watch the video at a slow speed and try to follow the code and understand what is done, without having to copy the code, and then download it from GitHub.

► Social Media 
GitHub: https://github.com/Punithraaj/Flutter_Tik_Tok_Clone_App.git
LinkedIn: https://www.linkedin.com/in/roaring-r...
Twitter: https://twitter.com/roaringraaj
Facebook: https://www.facebook.com/flutterdartacademy

► Previous Episode : https://youtu.be/QnL3fr-XpC4
► Playlist: https://youtube.com/playlist?list=PL6vcAuTKAaYe_9KQRsxTsFFSx78g1OluK

I hope you liked it, and don't forget to like,comment, subscribe, share this video with your friends, and star the repository on GitHub!
⭐️ Thanks for watching the video and for more updates don't forget to click on the notification. 
⭐️Please comment your suggestion for my improvement. 
⭐️Remember to like, subscribe, share this video, and star the repo on Github :)

Hope you enjoyed this video!
If you loved it, you can Buy me a coffee : https://www.buymeacoffee.com/roaringraaj

LIKE & SHARE & ACTIVATE THE BELL Thanks For Watching :-)
 
https://youtu.be/F_GgZVD4sDk

#flutter tutorial - tiktok clone with firebase #flutter challenge @tiktokclone #fluttertutorial firebase #flutter firebase #flutter pageview #morioh #flutter

Punith Raaj

1640672627

Flutter Hotel Booking UI - Book your Stay At A New Hotel With Flutter - Ep1

https://youtu.be/-tHUmjIkGJ4
Flutter Hotel Booking UI - Book your Stay At A New Hotel With Flutter - Ep1
#flutter #fluttertravelapp #hotelbookingui #flutter ui design 

In this video, I'm going to show you how to make a Cool Hotel Booking App using Flutter and visual studio code. 

In this tutorial, you will learn how to create a Splash Screen and Introduction Screen, how to implement a SmoothPageIndicator in Flutter. 

🚀 Nice, clean and modern Hotel Booking #App #UI made in #Flutter 

⚠️ IMPORTANT: If you want to learn, I strongly advise you to watch the video at a slow speed and try to follow the code and understand what is done, without having to copy the code, and then download it from GitHub. 

► Social Media 

    GitHub: https://github.com/Punithraaj 

    LinkedIn: https://www.linkedin.com/in/roaring-r...

    Twitter: https://twitter.com/roaringraaj

    Facebook: https://www.facebook.com/flutterdartacademy

I hope you liked it, and don't forget to like,comment, subscribe, share this video with your friends, and star the repository on GitHub! 

⭐️ Thanks for watching the video and for more updates don't forget to click on the notification.⭐️Please comment your suggestion for my improvement. ⭐️Remember to like, subscribe, share this video, and star the repo on Github :)Hope you enjoyed this video! If you loved it, you can Buy me a coffee : https://www.buymeacoffee.com/roaringraaj

#flutter riverpod #flutter travel app #appointment app flutter #morioh

Aliyah Satterfield

Aliyah Satterfield

1591643580

Adobe XD plugin for Flutter with CodePen Tutorial

Recently Adobe XD releases a new version of the plugin that you can use to export designs directly into flutter widgets or screens. Yes, you read it right, now you can make and export your favorite design in Adobe XD and export all the design in the widget form or as a full-screen design, this can save you a lot of time required in designing.

What we will do?
I will make a simple design of a dialogue box with a card design with text over it as shown below. After you complete this exercise you can experiment with the UI. You can make your own components or import UI kits available with the Adobe XD.

#developers #flutter #adobe xd design export to flutter #adobe xd flutter code #adobe xd flutter code generator - plugin #adobe xd flutter plugin #adobe xd flutter plugin tutorial #adobe xd plugins #adobe xd to flutter #adobe xd tutorial #codepen for flutter.