The Activity Lifecycle in Android describes the states an Activity goes through from creation to destruction. Android manages these states to optimize app performance and user experience. 1.onCreate(): Called when the activity is created for the first time. Initialize resources, UI, and logic here. 2.onStart(): Called when the activity becomes visible to the user. 3.onResume(): Called when the activity starts interacting with the user (foreground state). 4.onPause(): Called when the activity is partially obscured (e.g., another activity appears). Save UI state here. 5.onStop(): Called when the activity is no longer visible. Release heavy resources. 6.onRestart(): Called before transitioning from stopped to started state. onDestroy(): Called before the activity is destroyed (e.g., back press or system killing). 7.onCreate(): Called when the activity is created for the first time. Initialize resources, UI, and logic here.