what is the android application

 BASIC FOR THE ANDROID    

     Android application are always written in the JAVA programming language. Android having one tool named SDK tools. This SDK tools compile the code along with the data and resources file.android file archive file with an .apk suffix. APK files contains all the contents of android application . That files are android powered device use to install application.
       
      The three important classes of the android platform that are content ,activity and intent. These three component from the building blocks for Each activity within an application has a unique purpose and user interface each and every application. An Android application is a collection of tasks, each of which is called an activity.