I want to create a dynamic listview which adds dynamic elements on scrolling to the end of the initial list. New items should be added everytime the scroll position reaches the end of previous list. How can I achieve this? Thank you.
you need to add a scroll listener and override the onscroll()
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I have an problem with implementation of recycler view.
I'm using listadapter with recyclerview.
Everythings work perfectyl unitl I'm changing arraylist items order.
When I'm changing the items order and submit it to adapter the recycler view makes scroll.
For examle if i reverse the arraylist , its scrolling to the bottom.
How to disable auto scrol or keep recyclerview scroll position when the sort orders is changed.
There are two possible ways to solve this issue. Please try them :-
You can use notifyItemRangedChanged(fromIndex,toIndex);.
You can use RecyclerView.scrollToPosition(0); when sort orders are changed.
Thank you!
The usual thing when I insert a new row into a ListView it is added at the bottom of the ListView by default. Can I make it upside down? I want the new added rows be on top, or I may say I want the ListView in descending flow sorted by time.
Is there a way to implement that from ListView settings? or it is related to the List connected with the ListView?
I searched about it and all I could find is "stackFromBottom" which makes the view of ListView scroll down and start showing from the bottom, and it is different from what I want.
you can add row to top using add function with index.
example :
items.add(0, obj)
inside adapter you have item list that you add the row to top(index 0) and call
notifyiteminserted or notifydatasetchanged
probably duplicated
Add new items to top of list view on Android?
You can do it in several way
1.You can use Collections Feature. After add item in your List then call Collections.reverse() then update your ListView
2.You can set your List to add(0,value) 0 no position then update your ListView
I have vertical RecyclerView for scrolling group of items and horizontal RecyclerView in each ViewHolder in order to scrol items inside of these groups. They are populated from database. Whenever item content is changed (user tap something or new data come from network) it is written to database and then notifyDataSetChanged() is called for the group cursor. I check if it is the same group in onBingViewHolder() and update items only if it is. But horizontal RecyclerView is scrolled anyway to the first item.
How could I prevent this behavior and why does it happens ?
BTW I'm writing result of this check in 'onBindViewHolder()` to the log and I can see that it is the same item.
Thanks.
RecyclerView creates new ViewHolder in order to perform animation. setItemAnimator(null) solved my problem.
I have a Listview in my Android app, and I want there to be some horizontal lines when the list is empty to indicate to the user that this is a List. I know that there is the setEmptyView method on ListView, but I'm not sure what to put in that view if I want there to be list rows with horizontal lines. How would I accomplish this?
Having a bunch of horizontal lines for an empty list is an iOS convention. If you want your app to fit in with Android better you should set something else. Perhaps notify the user there was an error or that there are no items in the list. You can add this right to your layout.xml file if you're using a ListActivity. All you need to do is create a view and give it the id #android:id/empty.
put the listView in a FrameLayout and add another view in that Frame.
if you having any item in the list hide its (visiblity="gone") and show the other view.
OR
change your adapter to return multi ViewType
in your adapter if you have no item return other type of view
I am want to add cells to GridView dynamically when the user reach the last row of cells its like the show more?
Check out CommonsWare EndlessAdapter. Very straight-forward Adapter implementation.
You could also manually use an OnScrollListener on the GridView. Use the onScrollStateChanged() callback to figure out when the grid is OnScrollListener.SCROLL_STATE_IDLE, then determine if the last grid item is visible. If so, get more items for your Adapter, and call notifyDataSetChanged().