Android: notifyDataSetChanged(); not working

by

One of the main reasons notifyDataSetChanged() won’t work for you – is,

Your adapter loses reference to your list.

When you first initialize the Adapter it takes a reference of your arrayList and passes it to its superclass. But if you reinitialize your existing arrayList it loses the reference, and hence, the communication channel with Adapter.

When creating and adding a new list to the Adapter. Always follow these guidelines:

  1. Initialise the arrayList while declaring it globally.
  2. Add the List to the adapter directly without checking for null and empty values. Set the adapter to the list directly (don’t check for any condition). Adapter guarantees you that wherever you make changes to the data of the arrayList it will take care of it, but never
    lose the reference.
  3. Always modify the data in the arrayList itself (if your data is completely new then you can call adapter.clear() and arrayList.clear() before actually adding data to the list) but don’t set the adapter i.e If the new data is populated in the arrayList than just adapter.notifyDataSetChanged()

Stay true to the Documentation.

More Related Contents:

  1. get Feature item to list View
  2. Get resources images from variable
  3. How to refresh Android listview?
  4. Android, ListView IllegalStateException: “The content of the adapter has changed but ListView did not receive a notification”
  5. Android: How to bind spinner to custom object list?
  6. Call Activity method from adapter
  7. Filtering ListView with custom (object) adapter
  8. AlphabetIndexer with Custom Adapter managed by LoaderManager
  9. Is there a better way to refresh WebView?
  10. What is the intent of the methods getItem and getItemId in the Android class BaseAdapter?
  11. How to force an entire layout View refresh?
  12. How to show installed app list in a listview without Checkbox getting unchecked when listview is scrolled?
  13. What’s the purpose of item-id’s in Android ListView Adapter?
  14. android attaching multiple adapters to one adapter
  15. Remove all items from RecyclerView
  16. Logcat error: “addView(View, LayoutParams) is not supported in AdapterView” in a ListView
  17. OnItemClickListener doesn’t work with ListView item containing button
  18. What’s the role of adapters in Android?
  19. Cannot add header view to list — setAdapter has already been called
  20. How to get selected list items from a Listview with checkBox and Custom Adapter?
  21. Custom ListView adapter, strange ImageView behavior
  22. ArrayIndexOutOfBoundsException with custom Android Adapter for multiple views in ListView
  23. How to read file from res/raw by name
  24. How do I rotate the Android emulator display? [duplicate]
  25. Accessing UI thread handler from a service
  26. Waiting till the async task finish its work
  27. Unable to cast Action Provider to Share Action Provider
  28. Draw a semicircle in the background of a View
  29. Keyboard hides BottomSheetDialogFragment
  30. Is there another place to get a google-services.json?

Leave a Comment