How to handle AsyncTask onPostExecute when paused to avoid IllegalStateException

by

If you need to synchronize your task with the activity lifecycle, I believe that Loaders are exactly what you need. More specifically, you should use AsyncTaskLoader to do the job. So now instead of running an AsyncTask, you launch your loader, then wait for response in a listener. If the activity is paused, you won’t get a callback, this part will be managed for you.

There is another way to handle this task: using a fragment which retains its instance. The general idea is that you create a fragment without UI and call setRetainInstance(true). It has a task which is being notified about the activity being available or not. If not, the task’s thread suspends until an activity becomes available.

More Related Contents:

  1. Difference and uses of onCreate(), onCreateView() and onActivityCreated() in fragments
  2. Why use Fragment#setRetainInstance(boolean)?
  3. Android Fragments. Retaining an AsyncTask during screen rotation or configuration change
  4. java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
  5. Android. Fragment getActivity() sometimes returns null
  6. Display fragment viewpager within a fragment
  7. One Activity and all other Fragments [closed]
  8. fragment lifecycle: when “ondestroy” and “ondestroyview” are not called?
  9. What is the benefit of using Fragments in Android, rather than Views?
  10. View pager and fragment lifecycle
  11. implement AsyncTask in Fragment android
  12. Android Fragment onCreateView vs. onActivityCreated
  13. How to execute background task when Android app is closed / set to background?
  14. Retrieve a Fragment from a ViewPager
  15. Update ViewPager dynamically?
  16. Communicating between a fragment and an activity – best practices
  17. How do I get the currently displayed fragment?
  18. How to handle Handler messages when activity/fragment is paused
  19. Best practice for nested fragments in Android 4.0, 4.1 (
  20. How to add “Go Back” function in WebView inside Fragment?
  21. Why do I want to avoid non-default constructors in fragments?
  22. Fragments in Android 2.2.1, 2.3, 2.0. Is this possible?
  23. How to get Toolbar from fragment?
  24. Position of DialogFragment in Android
  25. Why does navigation not work in the Navigation Drawer Activity template with version 2.4.1?
  26. FragmentTransaction animation to slide in over top
  27. How to Handle backPress with Fragment
  28. Keyboard hides BottomSheetDialogFragment
  29. Placing ViewPager as a row in ListView
  30. Fragment standard transition not animating

Leave a Comment