Android activity life cycle - what are all these methods for?

Question

What is the life cycle of an Android activity? Why are so many similar sounding methods (onCreate(), onStart(), onResume()) called dur

Answer 1

Activity has six states

• Created
• Started
• Resumed
• Paused
• Stopped
• Destroyed

Activity lifecycle has seven methods

• onCreate()
• onStart()
• onResume()
• onPause()
• onStop()
• onRestart()
• onDestroy()

Situations

• When open the app

  onCreate() --> onStart() -->  onResume()
  

• When back button pressed and exit the app

  onPaused() -- > onStop() --> onDestory()
  

• When home button pressed

  onPaused() --> onStop()
  

• After pressed home button when again open app from recent task list or clicked on icon

  onRestart() --> onStart() --> onResume()
  

• When open app another app from notification bar or open settings

  onPaused() --> onStop()
  

• Back button pressed from another app or settings then used can see our app

  onRestart() --> onStart() --> onResume()
  

• When any dialog open on screen

  onPause()
  

• After dismiss the dialog or back button from dialog

  onResume()
  

• Any phone is ringing and user in the app

  onPause() --> onResume() 
  

• When user pressed phone's answer button

  onPause()
  

• After call end

  onResume()
  

• When phone screen off

  onPaused() --> onStop()
  

• When screen is turned back on

  onRestart() --> onStart() --> onResume()