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== Activity Component ==
One of the
most important application component type is called '''Activity''' and provides a screen for the user to interact with.
The activity object could be created from a subclass of the [http://d.android.com/reference/android/app/Activity.html Activity] class or one of its subclasses.
Here is a [https://zenit.senecac.on.ca/svn/ecl500/Lectures/trunk/w11-mobile-android-simple/ sample that illustrates the activity] life cycle.