How to use drag and drop in Android. It is based on Eclipse 4.2 (Indigo), Java 1.6 and Android 4.2.

How to process JSON within Android. It is based on Eclipse 3.6, Java 1.6 and Android 2.3.3

This tutorial describes the usage of Threads, Handlers and AsyncTask in your application.

This tutorial describes how to access web resources via HTTP in Android. It is based on Eclipse 3.7, Java 1.6 and Android 4.0 (Ice Cream Sandwich).

This tutorial describes how to save key-value pairs using the preference API in Android. It also explains how to read and write files in Android. It is based on Eclipse 3.7, Java 1.6 and Android 4.1 (Ice Cream Sandwich).

This article describes how to process XML with Android. It is based on Eclipse 3.7, Java 1.6 and Android 4.0

This tutorial describes how to use the SQLite database in Android applications. It also demonstrates how to use existing ContentProvider and how to define new ones.

How to collect the the Strings starting with “@” and “#”, but this things can be changed by simply changing the Patterns that you require and giving the proper Regular Expression for them.