Android Activity Lifecycle Methods Executed Sequence

What is Android Activity?

Android Activity is an application component which creates a default window on screen, where we can place different components such as button, text view, spinner etc.

Diagram of Android Activity Lifecycle:

Android Activity Lifecycle is controlled by 7 methods those are as follows:

• onCreate() : called when the activity is first created.
• onStart() : called when activity is becoming visible to user.
• onResume() : called when activity will start interacting with user.
• onPause() : called when activity is not visible to user.
• onStop() : called when activity is no longer visible to user.
• onRestart() : called after your activity is stopped, prior to start.
• onDestroy() : called before the activity gets destroyed.

Android Activity Lifecycle methods execution sequence:

Scenario 1: (Single Activity)

User launched the app (activity gets created)

• onCreate()
• onStart()
• onResume()

User pressed the back button

• onPause()
• onStop()
• onDestroy()

Scenario 2: (Between two different Activity eg. “A” to “B”)

User launched the app (activity “A” gets created)

• ActivityA onCreate()
• ActivityA onStart()
• ActivityA onResume()

User navigate from Activity A to B

• ActivityA onPause()
• ActivityB onCreate()
• ActivityB onStart()
• ActivityB onResume()
• ActivityA onStop()

User pressed back button (currently on Activity B)

• ActivityB onPause()
• ActivityA onRestart()
• ActivityA onStart()
• ActivityA onResume()
• ActivityB onStop()
• ActivityB onDestroy()

User again pressed back button (currently on Activity A)

• ActivityA onPause()
• ActivityA onStop()
• ActivityA onDestroy()

For more info you can visit: https://developer.android.com/guide/components/activities/activity-lifecycle