What is Activity.finish() method doing exactly?

by

When calling finish() on an activity, the method onDestroy() is executed. This method can do things like:

  1. Dismiss any dialogs the activity was managing.
  2. Close any cursors the activity was managing.
  3. Close any open search dialog

Also, onDestroy() isn’t a destructor. It doesn’t actually destroy the object. It’s just a method that’s called based on a certain state. So your instance is still alive and very well* after the superclass’s onDestroy() runs and returns.Android keeps processes around in case the user wants to restart the app, this makes the startup phase faster. The process will not be doing anything and if memory needs to be reclaimed, the process will be killed

More Related Contents:

  1. Android activity life cycle – what are all these methods for?
  2. Removing an activity from the history stack
  3. On logout, clear Activity history stack, preventing “back” button from opening logged-in-only Activities
  4. Activity OnDestroy never called?
  5. Using the Android Application class to persist data
  6. Android Activity onDestroy() is not always called and if called only part of the code is executed
  7. Is ondestroy not always called?
  8. Why does calling getWidth() on a View in onResume() return 0?
  9. onDestroy gets called each time the screen goes on
  10. Activity lifecycle – onCreate called on every re-orientation
  11. Android app doesn’t call “onDestroy()” when killed (ICS)
  12. Android service onCreate is called multiple times without calling onDestroy
  13. Simulate killing of activity in emulator
  14. Google Cloud Endpoints and user’s authentication
  15. Android WebView style background-color:transparent ignored on android 2.2
  16. YUV_420_888 interpretation on Samsung Galaxy S7 (Camera2)
  17. Android Singleton with Global Context
  18. EXIF orientation tag value always 0 for image taken with portrait camera app android
  19. Evenly spacing views using ConstraintLayout
  20. Is it possible to programmatically uninstall a package in Android
  21. Why isn’t my vector drawable scaling as expected?
  22. cordova platform add android not working while listing Android targets
  23. difference between and on Android
  24. Activity.finish() called but activity stays loaded in memory
  25. Google Maps v2 – set both my location and zoom in
  26. Android – set a ProgressBar to be a vertical bar instead of horizontal?
  27. Android findViewbyId with a variant string
  28. Content Provider INSTALL_FAILED_CONFLICTING_PROVIDER (installing content provider as a separate apk)
  29. Android AudioTrack playing .wav file, getting only white noise
  30. How do the Android Support Libraries work?

Leave a Comment