I'm trying to copy the official Google Fit sample from here Setup and Sensors. I'm having problems with the DataSourceListener. When I try to add that class in AndroidStudio it doesn't seem to find it, the class doesn't seem to exist...
The API has changed slightly since that video was released. See the SensorApi documentation for more details. The DataSourceListener has been replaced by the OnDataPointListener which is used in a call to SensorApi.add(GoogleApiClient, SensorRequest, OnDataPointListener).