I've implemented the RecyclerView concept in studio and am working on adding methods like add and remove items in RecyclerView and it works fine.
My question : while am press the add Button it adds but as a user am not aware of that where it is actually add, in my code am give the position at 1 as static and am scrolled to bottom and click the add button means am not able to know whether it is add or not once am scroll to top only its known. so for this we can able to move the scroll position to the specific item add position during add/remove has been taken.Thanks.
we want to show the exact place of the item is add/removed by scroll the position using following property
recyclerView.scrollToPosition(1);
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So, I have a recyclerview with multiple view types. I'm using this link to generate my adapter class, becauseI have multiple viewholders in my recyclerview. Now the problem I have is with collapsing certain items inside it. What I want is whenever I press
the green toggle, item 2 and 3 in the list should collpase but 4,5,6 should remain upon,unless you have clicked on the green item ofcourse. I tried many ways to approach this but I can not achieve this with the link provided. Is there any way I can achieve this?
When you click collapsing button you have to remove your collapsing data from your all source list. When you remove your item from your list recyclerView automatically animates it.After that when you want to show it again you have to insert it your list again and notify that.RecyclerView also animates again when you insert it. There is a useful link here for inserting and removing special data from recyclerView https://medium.com/#suragch/updating-data-in-an-android-recyclerview-842e56adbfd8
I'm trying to create "sticky headers" on a RecyclerView (which uses a LinearLayoutManager) but now I'm facing a problem. When I click on one item of the list, a new item is automatically inserted just below it and the RecyclerView's default animation is shown (the one which smoothly adds and shows the new item). When I tap the initial item again, this new added item is removed, and the RecyclerView's default animation is shown again (the one to slowly hide the removed item).
I have completed all the sticky headers functionality but now my problem is that when I click the last list item and the hide default animation is shown (with a scroll up), my sticky headers don't work. I need to know (and here is were I'm stuck) how to get notified while this RecyclerView animation is being performed when adding/removing items. I need to get notified with all the animation steps, not only the start and end ones.
So far I've tried to use a RecyclerView onScrollListener and a ViewTreeObserver (attached to the added/removed view) but neither worked. If someone could give me some help, it would be really appreciated.
Thanks in advance to all the Stack Overflow community
How can I stop RecyclerView from scrolling to the bottom of the list whenever I add items?
Even when I insert something at the top of the list and call notifyDataSetChanged or notifyItemInserted the list scrolls to the bottom.
The one feature that works as expected is notifyItemRemoved(index)
I think I was calling notifyRangeInserted() with the entire list and that was scrolling to the end of that range.
If you're having similar issues, just cut the Adapter functionality back to its bare essentials and build up from there.
The problem was I had an item in the list, a ProgressBar to indicate that data was loading, but when the new items loaded I added them to the list, this moved the "focused item," the ProgressBar down and if there were enough items to move it off the screen then the RecyclerView would scroll down to keep it on screen. The problem being 1. I didn't want it to maintain "focus" and 2. The very next thing I did was remove the ProgressBar from the `Adapter.
So the solution is to remove the ProgressBar or other items before adding items earlier positions in the Adapter.
I'm having hard time making this work.
I have the following scenario - when click on CardView the most inner Image should get visible. On second click should disappear. This works fine.
However I want when I select the second CardView the most inner Image to appear the the Image on the first CardView to disappear.
I have this:
1. CardView generated in XML - the cardview have 2 ImageView inside
2. RecyclerView with CustomAdapter and ViewHolder.
3. When I implement OnClick inside ViewHolder it works for each Item - on click the Image appears and on second it disappears.
However I don't know how to check on which Item the image is visible so I can hide it if another Item is clicked. In other word if I select the second I want the first to be deselected. I don't know how to handle this per position.
Any ideas?
Seems like I was missing the point. I solved the problem simply with:
notifyItemChanged(position);
This redraws the item on this position. Since I have simple show/hide behavior with "hide" on initialization I was just using the hide state in OnBindViewHolder and the redraw did the trick.
I want to display a list item that says "More" at the end of my ListView. Clicking on this list-item will perform some action. How can I create this "more" list item?
I don't know about the "Clicking on this list-item will perform some action" part. The typical pattern is that once the user scrolls to the bottom, new material is loaded automatically. Some people do that by detecting the scroll. I do it by putting in a "More" placeholder and detecting when that is used. Here is a component that implements this pattern.
Just add another value to your arrayadapter (or any other adapter), you might be using.set the text to 'more' .
Suppose you have n items in the list then handle the (n+1)th postion click and do your stuff.
You can add a footer to your listview...
Did you check this post out?
Android ListView Footer View not being placed on the bottom of the screen