My app is reading weight data from Google Fit. The data were inserted by Withings and by my own app. But this doesn't make any difference when I call dataSet.getDataSource().getAppPackageName(), because it always returns com.google.android.gms. So I have no chance of knowing where the data came from. Google describes how to get information of the data source in this article: https://developers.google.com/fit/android/data-attribution Unfortunately this is completely useless to me.
I'm using Google Play Services 8.3.0, tested using Android 4.3, 4.4.2 and 6.0.1.
Can anyone confirm the same behavior? Or am I doing something wrong? Any feedback is appreciated.
public void connect(final Activity activity) {
    client = new GoogleApiClient.Builder(activity)
        .addApi(Fitness.HISTORY_API)
        .addApi(Fitness.CONFIG_API)
        .addScope(new Scope(Scopes.FITNESS_ACTIVITY_READ_WRITE))
        .addScope(new Scope(Scopes.FITNESS_BODY_READ_WRITE))
        .build();
    client.connect();
}
public DataReadResult readWeightValues(final Date startDate, final Date endDate) {
    final DataReadRequest readRequest = new DataReadRequest.Builder()
        .enableServerQueries()
        .setTimeRange(startDate.getTime(), endDate.getTime(), TimeUnit.MILLISECONDS)
        .read(DataType.TYPE_WEIGHT)
        .build();
    return Fitness.HistoryApi.readData(client, readRequest).await(1, TimeUnit.MINUTES);
}
public void examineWeightValues(final DataReadResult dataReadResult) {
    if ((dataReadResult != null) && dataReadResult.getStatus().isSuccess()) {
        if (!dataReadResult.getBuckets().isEmpty()) {
            for (final Bucket bucket : dataReadResult.getBuckets()) {
                final List<DataSet> dataSets = bucket.getDataSets();
                for (final DataSet dataSet : dataSets) {
                    Log.i("=====>", dataSet.getDataSource().getAppPackageName());
                }
            }
        }
        if (!dataReadResult.getDataSets().isEmpty()) {
            for (final DataSet dataSet : dataReadResult.getDataSets()) {
                Log.i("=====>", dataSet.getDataSource().getAppPackageName());
            }
        }
    }
}
public Status insertWeightValue(final Context context, final Date date, final float weightKg) {
    final DataSource dataSource = new DataSource.Builder()
        .setAppPackageName(context.getApplicationContext().getPackageName())
        // already tried setAppPackageName(context) too
        .setName("com.mycompany.myapp")
        .setDataType(DataType.TYPE_WEIGHT)
        .setType(DataSource.TYPE_RAW)
        .build();
    final DataSet dataSet = DataSet.create(dataSource);
    final DataPoint dataPoint = dataSet.createDataPoint();
    dataPoint.setTimestamp(date.getTime(), TimeUnit.MILLISECONDS);
    dataPoint.getValue(Field.FIELD_WEIGHT).setFloat(weightKg);
    dataSet.add(dataPoint);
    return Fitness.HistoryApi.insertData(client, dataSet).await(1, TimeUnit.MINUTES);
}