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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The Adapter does not know you changed the List in the Activity. What does "it shows effect after fragment moves.

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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. Do you mean, you can't change background of view even if calling notifyDataSetChanged and swipe view pager 2, 3 times?

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.

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Leave a comment Cancel reply. Sign me up. Uses a lot of resources and garbage collection. Sign in to comment. Re-create the ArrayAdapter with the new List data. The Adapter does not know you changed the List in the Activity. Thank you for your help VIkash Parajuli vparajuli gmail. Jump to bottom. This library supports 'notifyDataSetChanged' only for changing order of items or size of list. Then, notifyDataSetChanged will work. Copy link. You switched accounts on another tab or window. I want to change background of fragment which is on viewpager but it shows effect after fragment moves. Already have a WordPress.

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Log in now. So view will be redrawed and background color will change. I'll try with Bus. Skip to content. Copy link. Maybe you can make it in custom adapter of your project or this library. Have a question about this project? 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. All reactions. No matter whether using this library or not, if you want recreating fragment on calling notifyDataSetChanged , you have to override getItemPosition method of adapter and return appropriate value. Already on GitHub? Notifications Fork 15 Star Use the notifyDataSetChanged every time the list is updated. Thank you.