health 2.0.2

Wrapper for the iOS HealthKit and Android GoogleFit services.

Health

This library combines both GoogleFit and AppleHealthKit. It support most of the values provided.

Supports iOS and Android X

NB: For Android, your app needs to have Google Fit installed and have access to the internet, otherwise this plugin will not work.

Data Types

Data Type	Unit	iOS Support	Android support	Comments
ACTIVE_ENERGY_BURNED	CALORIES	yes	yes
BASAL_ENERGY_BURNED	CALORIES	yes
BLOOD_GLUCOSE	MILLIGRAM_PER_DECILITER	yes	yes
BLOOD_OXYGEN	PERCENTAGE	yes	yes
BLOOD_PRESSURE_DIASTOLIC	MILLIMETER_OF_MERCURY	yes	yes
BLOOD_PRESSURE_SYSTOLIC	MILLIMETER_OF_MERCURY	yes	yes
BODY_FAT_PERCENTAGE	PERCENTAGE	yes	yes
BODY_MASS_INDEX	NO_UNIT	yes	yes
BODY_TEMPERATURE	DEGREE_CELSIUS	yes	yes
ELECTRODERMAL_ACTIVITY	SIEMENS	yes
HEART_RATE	BEATS_PER_MINUTE	yes	yes
HEIGHT	METERS	yes	yes
RESTING_HEART_RATE	BEATS_PER_MINUTE	yes
STEPS	COUNT	yes	yes
WAIST_CIRCUMFERENCE	METERS	yes
WALKING_HEART_RATE	BEATS_PER_MINUTE	yes
WEIGHT	KILOGRAMS	yes	yes
DISTANCE_WALKING_RUNNING	METERS	yes
FLIGHTS_CLIMBED	COUNT	yes
MOVE_MINUTES	MINUTES		yes
DISTANCE_DELTA	METERS		yes
HIGH_HEART_RATE_EVENT	NO_UNIT	yes		Requires Apple Watch
LOW_HEART_RATE_EVENT	NO_UNIT	yes		Requires Apple Watch
IRREGULAR_HEART_RATE_EVENT	NO_UNIT	yes		Requires Apple Watch
HEART_RATE_VARIABILITY_SDNN	MILLISECONDS	yes		Requires 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;
HealthDataType _type;
HealthDataUnit _unit;
DateTime _dateFrom;
DateTime _dateTo;
PlatformType _platform;
String _uuid, _deviceId;

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

Fetch health data for a single data type

Fetch health data

To fetch data, specify a date-interval and the desired health data types:

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

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

List<HealthDataPoint> healthData =
            await health.getHealthDataFromType(startDate, endDate, types);

NB for iOS: The device must be unlocked before Health data can be requested, otherwise an error will be thrown:

flutter: Health Plugin Error:
flutter: 	PlatformException(FlutterHealth, Results are null, Optional(Error Domain=com.apple.healthkit Code=6 "Protected health data is inaccessible" UserInfo={NSLocalizedDescription=Protected health data is inaccessible}))

Full example

List<HealthDataPoint> _healthDataList = [];
DateTime startDate = DateTime.utc(2001, 01, 01);
DateTime endDate = DateTime.now();

HealthFactory health = HealthFactory();

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

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

/// Save all the new data points
_healthDataList.addAll(healthData);

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

Filtering out duplicates

If the same data is requested multiple times and saved in the same array (as in the example above) duplicates will occur.

A single data point can be compared to each other with the == operator, i.e.

HealthDataPoint p1 = ...;
HealthDataPoint p2 = ...;
bool same = p1 == p2;

If you have a list of data points, duplicates can be removed with:

List<HealthDataPoint> points = ...;
points = Health.removeDuplicates(points);