I'm going to create a card list like Google Play app that always show 3 items completely and one or two item part that tell us that the list has more items.
This is easy by RecyclerView that use LinearLayoutManager in HORIZONTAL mode. That explained in this answer.
But the problem is item by item scrolling like Google Play app that doesn't stop in any place and if you stop scrolling in middle of an item it moves to begin of that.
And it shows exactly 3 item in the main box not 2 and a half or 3 and a few.
There's a Library just for that case named GravitySnapHelper: https://github.com/rubensousa/GravitySnapHelper
You can use viewpager for this.
Related
I need to create recyclerView with collapsing items. For example, I have a list of 10 items. By default, I only need to flip the first 2 elements. But by clicking on the "See all" button, I need to display all the items in the list. And vice versa, by clicking on the "Hide" button, you need to leave only the first two items in the list. Here is an example:
I suppose to implement it like this: create a flag that determines whether the full list is displayed or not, and by clicking on the button, depending on the flag, send the full list to the adapter or cut it to two elements and call notifyDataSetChanged().
But this solution seemed to me not very good, perhaps there is a more elegant solution.
Note: I don't need nested collapsing elements. I just need to display two items from a list or all items.
Please help me.
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 would like to know if there is any way how to implement RecyclerView with only part of the collection. For example, the ArrayList would have 10 bitmaps in it, but only 6 can fit the screen without scrolling. So I want to show only 5 of them, and the 6th would be a clickable Button/ImageView which would say 'View 5 more'.
Is it possible to achieve this? Thanks.
one way would be having 2 lists in your adapter, one is the list that you actually show (show list) and the other one the full dataset. as long as you're not showing the full dataset, add a row at the end with the button show more, when clicking the button add a new batch of items from the full dataset to the show list.
I'm using Android Studio, and I have a listView that musts display an important amount of items. showing all of these items have a huge impact on performances. SO I would like to show them 10 by 10, and with a button show the 10 next items. After some researches, I found this android How to limit list items display in ListView and a button show more and this How to limit list items display in ListView by 10 and next 10after clicking next button. But these didn't lead me to a success. The 1st link looks easier but I didn't know where to put the code samples to make it work. Thanks for help !
You dont need to show "Load More" Button always. You can use Android's Recycler View for this. It will load only the data which can be shown on screen. Rest of the data will be loaded as you scroll down. And the view which is scrolled up (Vanishing views) are recycled automatically.
Check this links
https://developer.android.com/training/material/lists-cards.html
https://guides.codepath.com/android/using-the-recyclerview
https://www.binpress.com/tutorial/android-l-recyclerview-and-cardview-tutorial/156
First link question have a simple answer, If you made a custom adapter for populating listview then there will be a getCount() method which will return the number of items you want to show on listview. if you have not getCount() method then simply override it.
Link
there i(variable) have that value which number if items you want to show on listview, on refresh button click increment the value of i(variable) that will again refresh the whole listview and add the total number of items in listview which is the value of i(variable)
I am using a scroll listener to detect the end of the Listview.The list initially has 20 items. When the end is reached I populate the list with 10 more items from the DB. At the same time I remove the top 10 items which aren't visible. Since I delete the top 10 items the newly added items are shown on screen and the scroll listener detects end of list and populates 10 more items. So my two problems are
1) How do I stop the position of the item I am currently viewing from changing ?
2) How to prevent the onScrollListener from being called multiple times ?
I guess if you could help me with the first problem, the second would automatically be taken care of.
By the way ,I call notifyDatasetchanged to update the content of the adapter. Kindly help, and thanks.