Android Development is the method using which users can create new application for Android OS. Mostly these applications are developed by using Java program language and Android development kit; however, as per the discretion of the users other tools can also be used for apps development.
As on date more than 2.5 million of Android apps have been developed, and the estimation of total download number of these apps is around 30 billion. Most of these apps are available free of cost. Android, being an open source mobile OS combines and shapes on parts of many diverse open source projects.