title: How can i check Server not responding condition?
body: <p>In my app am getting data from a webserver using json. so each time i communicate with sever i would get a json and iam using it in right way.But some time my sever is down .Then how do i check whether the server is online or down before sending request from app other wise app will crash?</p>
  
  <p>Please help me?</p>