Android developer

http://loopj.com/android-async-http/

The term  asynchronous  is usually used to describe  communications  in which data  can be transmitted intermittently rather than in a steady stream. For example, a telephone conversation is asynchronous because both parties can talk whenever they like. If the communication were  synchronous , each party would be required to wait a specified interval before speaking. The difficulty with asynchronous communications is that the receiver must have a way to distinguish between valid data and  noise . In computer communications, this is usually accomplished through a special  start bit  and stop bit  at the beginning and end of each piece of data. For this reason, asynchronous communication is sometimes called  start-stop   transmission .