title: How to access data usage settings of specific app programmatically?
body: <p>I'm developing an Android app which needs to download a lot of data.</p>
  
  <p>I'd like to measure the data traffic of my app for specific period of time (like month).</p>
  
  <p>This option is available on System Settings -> Data Usage.</p>
  
  <ol>
  <li>Is there any way to access this setting programmatically?</li>
  <li>Can I use some of android libs to get traffic?</li>
  </ol>
  
  <p>I know about TrafficStats class but I can not get traffic for specific period of time and when i boot device this data is lost.</p>