How to Start One Activity from Another Activity in Android

In this Video, we see How to Start One Activity from Another Activity in Android? Before we learn the basic introduction of Activity. What is activity in android? Activity is nothing but the building block of the user interface and it is also called as a Java code that supports a screen or UI. Android Activity Lifecycle Methods: onCreate, onStart, onResume, onPause, onStop, onRestart, onDestroy.