Data attribution

Every data point in Google Fit has an associated data source. Data sources contain information that identifies 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 do the following:

• Invoke an intent to view data that's associated with a specific app.
• Receive intents to show data using your app.
• Find out which app inserted a session. For more information, see Work with sessions.

Determine which app inserted a data point

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:

Kotlin

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

Java

DataPoint dataPoint = ...
DataSource dataSource = dataPoint.getOriginalDataSource();
String appPkgName = dataSource.getAppPackageName();

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 that's similar to 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: Don't 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. Your app's intent filter needs to include all of the data types that your app supports, including custom data types.

The fitness intents include the following extras:

• vnd.google.gms.fitness.start_time
• vnd.google.gms.fitness.end_time
• vnd.google.gms.fitness.data_source

You can obtain data from these extras as follows:

Kotlin

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)
    }
}

Java

@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    ...
    String supportedType = DataType.getMimeType(DataType.TYPE_STEP_COUNT_DELTA);

    if (Intent.ACTION_VIEW.equals(getIntent().getAction()) && supportedType.equals(getIntent().getType())
    {
        // Get the intent extras
        long startTime = Fitness.getStartTime(getIntent(), TimeUnit.MILLISECONDS);
        long endTime = Fitness.getEndTime(getIntent(), TimeUnit.MILLISECONDS);
        DataSource dataSource = DataSource.extract(getIntent());
    }
}

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

Kotlin

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

Java

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

Invoke an intent to view data

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

Kotlin

// 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 if you'd like a
    // specific app to handle the intent if that app is installed on the device
    .build()

Java

// Inside your activity
long startTime = ...
long endTime = ...
DataSource dataSource = ...
DataType dataType = ...

Intent fitIntent = new HistoryApi.ViewIntentBuilder(this, dataType)
    .setTimeInterval(startTime, endTime, TimeUnit.MILLISECONDS)
    .setDataSource(dataSource) // Optional if a specific data source is desired
    .setPreferredApplication("com.example.app") // Optional if you'd like a
    // specific app to handle the intent if that app is installed on the device
    .build();

Learn more about how to use intents and intent filters.