Notifydatasetchanged not working

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For an ArrayAdapter , notifyDataSetChanged only works if you use the add , insert , remove , and clear on the Adapter. When an ArrayAdapter is constructed, it holds the reference for the List that was passed in. If you were to pass in a List that was a member of an Activity, and change that Activity member later, the ArrayAdapter is still holding a reference to the original List. The Adapter does not know you changed the List in the Activity. Your choices are: Use the functions of the ArrayAdapter to modify the underlying List add , insert , remove , clear , etc. Re-create the ArrayAdapter with the new List data. Uses a lot of resources and garbage collection.

Notifydatasetchanged not working

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Do you notifydatasetchanged not working, you can't change background of view even if calling notifyDataSetChanged and swipe view pager 2, 3 times? Leave a comment Cancel reply. Already have an account?

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Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. I want to change background of fragment which is on viewpager but it shows effect after fragment moves. Is there any solution for this problem? The text was updated successfully, but these errors were encountered:. What does "it shows effect after fragment moves.

Notifydatasetchanged not working

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. I have a adapter extends AbstractExpandableItemAdapter in fragment, and put List from outside, this data instance was only in adapter. I provide a public method in adapter to update data, but it doesn't work after data show in logcat. The text was updated successfully, but these errors were encountered:.

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Maybe you can make it in custom adapter of your project or this library. I want to change background of fragment which is on viewpager but it shows effect after fragment moves. Using event bus or content-provider, make activity post Changing background color event , and handle it in fragment to change view's behavior. I like this. Could you show me a sample code to reproduce the problem? Re-create the ArrayAdapter with the new List data. Create your own class derived from BaseAdapter and ListAdapter that allows changing of the underlying List data structure. Use the notifyDataSetChanged every time the list is updated. All reactions. Is there any solution for this problem? Like Loading You write code about changing background color in onCreateView of fragment.

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I understand the cause of the problem. Then, notifyDataSetChanged will work. Your choices are: Use the functions of the ArrayAdapter to modify the underlying List add , insert , remove , clear , etc. Sorry, something went wrong. Making a method that recreate items in adapter. Re-create the ArrayAdapter with the new List data. Notifications Fork 15 Star I want to change background of fragment which is on viewpager but it shows effect after fragment moves. Already have a WordPress. Leave a comment Cancel reply. If you were to pass in a List that was a member of an Activity, and change that Activity member later, the ArrayAdapter is still holding a reference to the original List. New issue. Comment Reblog Subscribe Subscribed. Dismiss alert. You signed in with another tab or window.