Android JSON Tutorial

JSON (Javascript Object Notation) is a lightweight, human-readable, data-interchange format. It was developed as a simpler alternative to XML, and is heavily used for web services.

Android HTTP Tutorial

The Android libraries include both the Apache HTTP Client, and the HttpURLConnection class. The Dalvik team is focusing their efforts on the latter, and recommend using it for applications targeting Gingerbread (Android v. 2.3) and beyond.