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Android lifecycle


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Android lifecycle

Android lifecycle

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  • 1. Disclaimer: This presentation is prepared by trainees of baabtra as a part of mentoring program. This is not official document of baabtra –Mentoring Partner Baabtra-Mentoring Partner is the mentoring division of baabte System Technologies Pvt . Ltd
  • 2. Typing Speed Week Target Achieved 1 20 18 2 25 20 3 25 22 4 30 25 5 35 27 6 35 30
  • 3. Activity Life Cycle in android SWALIH T www.facebook/ swalih321 9539353663
  • 4. • The Android system controls the lifecycle of your application. At any time the Android system may stop or destroy your application, e.g. because of an incoming call. • The Android system defines a lifecycle for Activities via predefined methods.
  • 5. • Each application runs in its own process. • Each activity of an app is run in the apps process • Processes are started and stopped as needed to run an apps components. • Processes may be killed to reclaim needed resources. • Killed apps may be restored to their last state when requested by the user
  • 6. • Most management of the life cycle is done automatically by the system via the activity stack. • The activity class has the following method callbacks to help you manage the app: – – – – – – – onCreate() onStart() onResume() onPause() onStop() onRestart() onDestroy()
  • 7. • onCreate() ::This method is called when first time activity is created. • onStart()::This method is called just before your activity becomes visible on the screen. • onResume()::This method is called after onStart() method and if your activity is the foreground activity on the screen.
  • 8. • onPause()::This method is called when your activity is just about to call another activity so that the current activity has to be paused and the new activity has to be resumed. Here the previous activity is not stopped but it loss the foreground visibility means it goes as background activity. • onStop()::This method is called when your activity is no longer visible on the screen. • onDestroy()::This method is called when your current activity has the last chance to do any processing before it is destroyed.
  • 9. Contact Us Emarald Mall (Big Bazar Building) Mavoor Road, Kozhikode, Kerala, India. Ph: + 91 – 495 40 25 550 Start up Village Eranakulam, Kerala, India. Email: NC Complex, Near Bus Stand Mukkam, Kozhikode, Kerala, India. Ph: + 91 – 495 40 25 550