Data Attribution

Every data point in Google Fit has an associated data source. Data sources contain information to identify the app or the device that collects or transforms the data. The package name of the app is available for data sources that don't represent a physical sensor.

Google Fit lets you:

• Find out which app inserted a session.
• Fire an intent to view data with a specific app.
• Receive intents to show data using your app.

For example, an app that analyzes a variety of data from the user's history may want to present users with the list of sessions included in the analysis, along with information about which app inserted each session. When users tap on each session, the app can fire an intent to show a detailed view of the session using a different app.

Find which app inserted a session

To obtain the package name of the application that inserted a session, use the Session.getAppPackageName method:

val session : Session = ...
val appPkgName = session.appPackageName

To obtain the package name of the application that inserted a data point, first call DataPoint.getOriginalDataSource to get the data source, then call the DataSource.getAppPackageName method:

val dataPoint : DataPoint = ...
val dataSource = dataPoint.dataSource
val appPkgName = dataSource.appPackageName

Get more information about an app

To determine whether an Android app is installed on the device and obtain more information about the app (such as its icon), use the Android tPackageManager class:

// Inside your activity
try {
    val appIcon = packageManager.getApplicationIcon(appPkgName)
} catch (e: PackageManager.NameNotFoundException) {
    // The app is not installed on this device
    ...
}

Note: Applications that use the REST API also provide a package name.

Receive intents from other apps

To register your app to receive intents from other health and wellness apps, declare an intent filter in your manifest like the following:

<intent-filter>
    <action android:name="vnd.google.fitness.VIEW" />
    <data android:mimeType="vnd.google.fitness.data_type/com.google.step_count.cumulative" />
    <data android:mimeType="vnd.google.fitness.data_type/com.google.step_count.delta" />
</intent-filter>

Note: Do not include the DEFAULT category in your intent filter, unless you want your app to receive intents for data created by other apps.

Each intent that your app receives from Google Fit is of only one type, but you can filter for multiple MIME types in a single intent filter. You should include all the data types that your app supports in your intent filter, including custom data types.

The fitness intents include all of the following extras:

• "com.google.gms.fitness.start_time"
• "com.google.gms.fitness.end_time"
• "com.google.gms.fitness.data_source"
• "com.google.gms.fitness.session"

You can obtain data from these extras as follows:

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    ...
    val supportedType = DataType.getMimeType(DataType.TYPE_STEP_COUNT_DELTA)

    if (Intent.ACTION_VIEW == intent.action && supportedType == intent.type) {
        // Get the intent extras
        val startTime = Fitness.getStartTime(intent, TimeUnit.MILLISECONDS);
        val endTime = Fitness.getEndTime(intent, TimeUnit.MILLISECONDS);
        val dataSource = DataSource.extract(intent);
        val session = Session.extract(intent);

        // Show the session in your app
        ...
    }
}

To obtain the MIME type for a custom data type, use the MIME_TYPE_PREFIX constant:

val supportedType = DataType.MIME_TYPE_PREFIX + "com.company.customdatatype";

Fire an intent to view data

To fire an intent to view data with another app, use the HistoryApi.ViewIntentBuilder class.

// Inside your activity
val startTime = ...
val endTime = ...
val dataSource = ...
val dataType = ...

val fitIntent = HistoryApi.ViewIntentBuilder(this, dataType)
    .setTimeInterval(startTime, endTime, TimeUnit.MILLISECONDS)
    .setDataSource(dataSource) // Optional - if a specific data source is desired
    .setPreferredApplication("com.example.app") // optional
    .build()

Fore more information about intents, see Intents and Intent Filters.