title: How to measure mobile data traffic on Android
body: <p>I'm developing an application that measure the data traffic recived through mobile data interface (no wifi) from all processes. Additionally this counter have to be related to a date range, i.e. betheen March 1 and April 1.</p>
  
  <p>I had read about TrafficStats class, but in the documentation doesn't mentioned any about from when are the stats.</p>
  
  <p>This is my first question and I really appreciate your help.</p>
  
  <p>Thanks</p>