What happens when we press back button in android

Once you press the back key the activity's onDestroy() method will be called and the activity will be flushed out of the memory. You will then be required to restart the activity by calling the startActivity() method which will in turn call its onCreate() Method.

1. What will happen if I will press the back button on the phone?
2. What is on back pressed Android?
3. How do I go back to previous activity on Android?
4. Which callback method is called when we press back button?

What will happen if I will press the back button on the phone?

Depending on the user's Android device, this button might be a physical button or a software button. Android maintains a back stack of destinations as the user navigates throughout your application. This usually allows Android to properly navigate to previous destinations when the Back button is pressed.

What is on back pressed Android?

What is onBackPressed() in Android? This is an override function called when the user presses the back button on an Android device. It has great implications on the activity lifecycle of the application.

How do I go back to previous activity on Android?

Android activities are stored in the activity stack. Going back to a previous activity could mean two things. You opened the new activity from another activity with startActivityForResult. In that case you can just call the finishActivity() function from your code and it'll take you back to the previous activity.

Which callback method is called when we press back button?

If the user presses the Back button and the Fragment is returned from the back stack, the lifecycle resumes with the onCreateView() callback. The Fragment class has other useful lifecycle callbacks: onResume() : Called by the Activity to resume a Fragment that is visible to the user and actively running.