Android studio recyclerview scroll up automatically

Having fun with the RecyclerView? Leave a comment below.Private class LoadingViewHolder extends RecyclerView. To select items when they are clicked, the ViewHolder constructor attaches a click listener: public class ViewHolder extends RecyclerView. Select next/previous item when the keyboard arrow keys are clicked.Select an item when the item is clicked.This class will perform two major functions: Tapping the thumb (the blue icon) should allow you to quickly scroll up and down the list: The fast scroll thumb can be seen on the right-hand side of the RecyclerView. At the end with the calculated offset we need to do. We need to get the top coordinate of the view item that we want to scroll to the top 3. That’s it If you run the app now, you should be able to see the fast scroll icon on the right-hand side of the screen. We need to get the top coordinate of the recyclerview element 2. It’s not that much code, but could be tricky to get it right.įirst create a custom class derived from RecyclerView Adapter which uses a custom ViewHolder. Step 4: Run the app to see the fast scroll in action. If you want to select an item, do it yourself. The RecyclerView does not attempt to do this.

The ListView will automatically keep track of a selected item (or items) and handle keyboard presses and touch events to automatically select and deselect items for you. One such example of where the ListView handled functionality (but the RecyclerView leaves it to the application code) is for tracking selection.

It is more lightweight and flexible, but also therefore requires more application code to craft it to do specifically what’s needed. The RecyclerView is the next generation widget for presenting a list (or grid) of items. That’s 4,000 lines of state management and conditional logic just to handle a list of things. However, over the years the ListView has taken on too much responsibility and layer on layer of functionality has turned it into a beast. It has been the backbone of any list-driven user interface. The ListView widget has been around since Android 1.0 in 2009. For example, see the Flexible Adapter among others.

Since this article was written 2 years ago, more robust solutions are available in open source libraries.

Android studio recyclerview scroll up automatically