Result of 
      HistoryClient.readData(com.google.android.gms.fitness.request.DataReadRequest).
Contains exactly one data set for each detailed data source requested in the
      
      DataReadRequest.
The methods 
      getDataSet(DataType) and 
      getDataSet(DataSource) can be used to fetch the resulting detailed data for a
      specific data source.
If aggregate data was requested, then the result will return buckets created as per the bucketing strategy specified in the request. Each bucket will have one data set per aggregate data requested.
The method 
      getBuckets() can be used to retrieve the buckets.
The method getStatus()
      can be be used to confirm if the request was successful.
In case the calling app is missing the required permissions, the returned status has
      status code set to 
      FitnessStatusCodes.NEEDS_OAUTH_PERMISSIONS. In this case the caller should use
      
      Status.startResolutionForResult(Activity, int) to start an intent to get the
      necessary consent from the user before retrying the request.
In case the app attempts to read custom data created by another app, the returned status
      has status code set to 
      FitnessStatusCodes.INCONSISTENT_DATA_TYPE.
Public Method Summary
| List<Bucket> | 
                 
                  
                  getBuckets()
                   
              
                    Returns all of the  
                Buckets
                    with aggregated data.
                   | 
            
| DataSet | |
| DataSet | |
| List<DataSet> | 
                 
                  
                  getDataSets()
                   
              
                    Returns all of the data sets in the result.
                   
                 | 
            
| Status | 
Inherited Method Summary
Public Methods
public List<Bucket> getBuckets ()
Returns all of the Buckets
            with aggregated data. In each bucket, there will be exactly one data set for each
            aggregated data source requested in the DataReadRequest.
Buckets only contain aggregated data requested via 
            DataReadRequest.Builder.aggregate(DataType). Non-aggregated data can be
            accessed via 
            getDataSet(DataType).
Returns
- An empty list if the read request failed.
 
public DataSet getDataSet (DataType dataType)
Returns the resulting data set for the given dataType. If more than one
            data source for the given data type was requested, this method will return the data for
            an arbitrary one. Use 
            getDataSet(DataSource) to read each specific data source.
This method returns only non-aggregated data sets that were queried via
            
            DataReadRequest.Builder.read(DataType) or 
            DataReadRequest.Builder.read(DataSource). Aggregated data can be queried via
            
            getBuckets().
Returns
- A data set for the given data type, empty if no data was found.
 
public DataSet getDataSet (DataSource dataSource)
Returns the resulting data set for the given dataSource.
This method returns only non-aggregated data sets that were queried via
            
            DataReadRequest.Builder.read(DataSource). Aggregated data can be queried via
            
            getBuckets().
Returns
- A data set for the given data source, empty if no data was found.
 
public List<DataSet> getDataSets ()
Returns all of the data sets in the result. There will be exactly one data set for
            each data source requested in the DataReadRequest.
This method returns only non-aggregated data sets that were queried via
            
            DataReadRequest.Builder.read(DataType) or 
            DataReadRequest.Builder.read(DataSource). Aggregated data can be queried via
            
            getBuckets().