In this blog post, we will explore the intricacies of Android activity lifecycle methods as they are invoked during various navigation scenarios and when the home button is pressed. Understanding these lifecycle methods is crucial for developing robust Android applications that manage their state and resources effectively. We will delve into the sequence of methods called when navigating between activities, when the user presses the home button, and how developers can leverage these lifecycle callbacks to handle state transitions gracefully.

1. On Launch:
   

   First Screen            onCreate Called
   First Screen            onStart Called
   First Screen            onResume Called

   
   
2. Back pressed after launch:
   

   First Screen            onPause Called
   First Screen            onStop Called

   
   

   Again Launch

   First Screen            onRestart Called
   First Screen            onStart Called
   First Screen            onResume Called

   
   
3. Home pressed:
   

   First Screen            onPause Called
   First Screen            onStop Called

   
   

   Again Launch

   First Screen            onRestart Called
   First Screen            onStart Called
   First Screen            onResume Called

   
   
4. Rotate:
   

   First Screen            onPause Called
   First Screen            onStop Called
   First Screen            onDestroy Called
   First Screen            onCreate Called
   First Screen            onStart Called
   First Screen            onResume Called

   
   

   Again Rotate – Back to Portrait:

   First Screen            onPause Called
   First Screen            onStop Called
   First Screen            onDestroy Called
   First Screen            onCreate Called
   First Screen            onStart Called
   First Screen            onResume Called

   
   
5. Navigate To Next Screen:
   

   First Screen            onPause Called
   Second Screen           onCreate Called
   Second Screen           onStart Called
   Second Screen           onResume Called
   First Screen            onStop Called

   
   

   Back to Previous Screen

   Second Screen           onPause Called
   First Screen            onRestart Called
   First Screen            onStart Called
   First Screen            onResume Called
   Second Screen           onStop Called
   Second Screen           onDestroy Called