HealthHub

A forked flutter plugin "health" from cph-cachet/flutter-plugins. HealthHub library meant to be a core health aggregator for Healthwork, capturing data from iOS and Android devices. Written in Dart language meant to be use with Flutter.

Supports iOS and Android X

Data Types

HealthHub Data TypeiOS HealthKitAvailable on AndroidComments
HEIGHT.heightyes
WEIGHT.bodyMassyes
BODY_MASS_INDEX.bodyMassIndexyes
BODY_FAT_PERCENTAGE.bodyFatPercentageyes
WAIST_CIRCUMFERENCE.waistCircumference
STEPS.stepCountyes
BASAL_ENERGY_BURNED.basalEnergyBurned
ACTIVE_ENERGY_BURNED.activeEnergyBurnedyes
BODY_TEMPERATURE.bodyTemperatureyes
BLOOD_PRESSURE_SYSTOLIC.bloodPressureSystolicyes
BLOOD_PRESSURE_DIASTOLIC.bloodPressureDiastolicyes
BLOOD_OXYGEN.oxygenSaturationyes
BLOOD_GLUCOSE.bloodGlucoseyes
BLOOD_ALCOHOL.bloodAlcoholContent
HEART_RATE.heartRateyes
RESTING_HEART_RATE.restingHeartRate
WALKING_HEART_RATE.walkingHeartRateAverage
HIGH_HEART_RATE_EVENT.highHeartRateEventRequires Apple Watch
LOW_HEART_RATE_EVENT.lowHeartRateEventRequires Apple Watch
IRREGULAR_HEART_RATE_EVENT.irregularHeartRhythmEventRequires Apple Watch
HRV_SDNN_HEART_RATE_EVENT.heartRateVariabilitySDNNRequires Apple Watch
ELECTRODERMAL_ACTIVITY.electrodermalActivityRequires Apple Watch

Setup

Apple HealthKit (iOS)

Step 1: Append the Info.plist with the following 2 entries

<key>NSHealthShareUsageDescription</key>
<string>We will sync your data with the Apple Health app to give you better insights</string>
<key>NSHealthUpdateUsageDescription</key>
<string>We will sync your data with the Apple Health app to give you better insights</string>

Step 2: Enable "HealthKit" inside the "Capabilities" tab.

Google Fit (Android)

Follow the guide at https://developers.google.com/fit/android/get-api-key

Below is an example of following the guide:

Change directory to your key-store directory (MacOS): cd ~/.android/

Get your keystore SHA1 fingerprint: keytool -list -v -keystore ~/.android/debug.keystore -alias androiddebugkey -storepass android -keypass android

Example output:

Alias name: androiddebugkey
Creation date: Jan 01, 2013
Entry type: PrivateKeyEntry
Certificate chain length: 1
Certificate[1]:
Owner: CN=Android Debug, O=Android, C=US
Issuer: CN=Android Debug, O=Android, C=US
Serial number: 4aa9b300
Valid from: Mon Jan 01 08:04:04 UTC 2013 until: Mon Jan 01 18:04:04 PST 2033
Certificate fingerprints:
     MD5:  AE:9F:95:D0:A6:86:89:BC:A8:70:BA:34:FF:6A:AC:F9
     SHA1: BB:0D:AC:74:D3:21:E1:43:07:71:9B:62:90:AF:A1:66:6E:44:5D:75
     Signature algorithm name: SHA1withRSA
     Version: 3

Follow the instructions at https://console.developers.google.com/flows/enableapi?apiid=fitness for setting up an OAuth2 Client ID for a Google project, and adding the SHA1 fingerprint to that OAuth2 credential.

The client id will look something like YOUR_CLIENT_ID.apps.googleusercontent.com

Android X

Replace the content of the android/gradle.properties file with the following lines:

org.gradle.jvmargs=-Xmx1536M
android.enableJetifier=true
android.useAndroidX=true

Usage

Below is a snippet from the example app showing the plugin in use.

Health data

A HealthData object contains the following fields:

num value;
String unit;
int dateFrom;
int dateTo;
String dataType;
String platform;

A HealthData healthData object can be serialized to JSON with the healthData.toJson() method.

Check authorization

The following example shows prompting the user for authorization to the API, which is necessary in order to fetch any data.

Calls to fetch data from the API should be done within the inner if-clause.

Future.delayed(Duration(seconds: 2), () async {
    bool _isAuthorized = await Health.requestAuthorization();
    if (_isAuthorized) {
    /// Do something with the API here
    }
});

Specify data type

Data types indicate the type of data to fetch from the API and are available from the enum class HealthDataType.

Below is an example of a few data types:

List<HealthDataType> types = [
        HealthDataType.WEIGHT,
        HealthDataType.HEIGHT,
        HealthDataType.STEPS,
    ];

For an overview of all data types see the table in Data Types section above.

Check if data type available

Not all data types are available on both platforms. In order to check whether or not a data type is available for the current platform,

bool weightAvailable = Health.isDataTypeAvailable(HealthDataType.WEIGHT);

Fetch data for a given type

Given the list of data types (types) as well as a startData and an endDate, we can now fetch all the data, for each data type with a call to the Health.getHealthDataFromType function.

Set up dates:

DateTime startDate = DateTime.utc(2001, 01, 01);
DateTime endDate = DateTime.now();

Make the fetch call:

List<HealthDataPoint> healthDataList = List<HealthDataPoint>();

for (HealthDataType type in types) {
    /// Calls to 'Health.getHealthDataFromType' must be wrapped in a try catch block.
    try {
        List<HealthDataPoint> healthData = await Health.getHealthDataFromType(startDate, endDate, type);
        healthDataList.addAll(healthData);
    } catch (exception) {
        print(exception.toString());
    }
}

This call must be inside a try catch block, since when some data type is not available, an exception will be thrown. Also, make sure the access to the API has been authorized (see Check authorization).

Full example

void _getHealthDataPoints() async {

    List<HealthDataType> types = [
        HealthDataType.WEIGHT,
        HealthDataType.HEIGHT,
        HealthDataType.STEPS,
    ];

    DateTime startDate = DateTime.utc(2001, 01, 01);
    DateTime endDate = DateTime.now();

    List<HealthDataPoint> healthDataList = List<HealthDataPoint>();

    Future.delayed(Duration(seconds: 2), () async {
        bool isAuthorized = await Health.requestAuthorization();
        if (isAuthorized) {
            for (HealthDataType type in types) {
                /// Calls to 'Health.getHealthDataFromType' must be wrapped in a try catch block.
                try {
                    List<HealthDataPoint> healthData = await Health.getHealthDataFromType(startDate, endDate, type);
                    healthDataList.addAll(healthData);
                } catch (exception) {
                    print(exception.toString());
                }
            }
        }
        /// Do something with the health data list
        for (var healthData in healthDataList) {
            print(healthData);
        }
    });
}

Libraries

healthhub