Android - While switching between two activities, the calling order of lifecycle methods of Activity

Question

I want to start an Activity (SECOND Activity) from another Activity (FIRST Activity) by calling startActivity(intent). Before I actually do it, I found people say that the lifecycle methods are called in the following order:

FIRST Activity onCreate FIRST Activity onStart FIRST Activity onResume FIRST Activity onPause SECOND Activity onCreate SECOND Activity onStart SECOND Activity onResume FIRST Activity onStop 

Is the SECOND Activity onResume always called before FIRST Acitivity onStop? I thought

FIRST Activity onPause FIRST Activity onStop SECOND Activity onCreate SECOND Activity onStart SECOND Activity onResume 

will be called, but it seems not.

Also, if I just switch between two activities,

FIRST Activity onPause SECOND Activity onRestart SECOND Activity onStart SECOND Activity onResume FIRST Activity onStop 

Are the methods always called in this order?

Answer 1

According to the documentation, SECOND.onResume() is supposed to be called before FIRST.onStop() https://developer.android.com/guide/components/activities/activity-lifecycle.html#soafa (Coordinating activities section)

Answer 2

Suppose There are two activities FirstActivity and SecondActivity.

Then this order will always remain same everytime.

// when you start FirstActivity

(1) OnCreate() -> OnStart() -> OnResume() of FirstActivity will be called

when you start SecondActivity using startActivity(new Intent(FirstActivity.this, SecondActivity.class))

(2) OnPause() of FirstActivity will be called and then

(3) OnCreate() -> OnStart() -> OnResume() of SecondActivity will be Called then

(4) OnStop() of FirstActivity will be called

// when you press back button on SecondActivity

(5) OnPause() of SecondActivity will be called then

(6) OnRestart() -> OnStart() -> OnResume() of FirstActivity will be called then

(7) onStop() -> onDestroy() of SecondActivity will be called

 Note:    (1) OnPause() will be called first when you navigate to any other activity.    (2) OnStop() will be called when activity is no longer Visible on screen.