The documentation for [`TrafficStats.incrementOperationCount()`](http://developer.android.com/reference/android/net/TrafficStats.html#incrementOperationCount%28int,%20int%29) says:

> 
> Increment count of network operations performed under the given
>  accounting tag. This can be used to derive bytes-per-operation.
> 
> 
> 

I want to find the total number of bytes transferred during a particular network operation. Since this API claims to help in deriving bytes-per-operation, can someone help me understand how to use it?