Android Application components

                                         Application component are the building block of android app.Each component is a different point through which the system can enter your app.Some component depends on each other but each one exits as it own entity and plays a specific role. There are five main components.They are
                                                 

                                              ACTIVITY

                                              SERVICE

                                              CONTENT PROVIDER

                                              BROADCAST RECEIVERS

                                              INTENT   

1. ACTIVITY           

                          Activity is individual user interface  screen in an android application where visual elements called view can be placed and the user can perform various action by interacting with it.