Why does a RecyclerView need an adapter?
The adapter is the piece that will connect our data to our RecyclerView and determine the ViewHolder (s) which will need to be used to display that data.
What is a RecyclerView in Android?
The RecyclerView is a widget that is more flexible and advanced version of GridView and ListView. It is a container for displaying large datasets which can be scrolled efficiently by maintaining limited number of views.
Why do we need RecyclerView in Android?
In Android, RecyclerView provides an ability to implement the horizontal, vertical and Expandable List. It is mainly used when we have data collections whose elements can change at run time based on user action or any network events. For using this widget we have to specify the Adapter and Layout Manager.
Which is better ListView or RecyclerView?
Simple answer: You should use RecyclerView in a situation where you want to show a lot of items, and the number of them is dynamic. ListView should only be used when the number of items is always the same and is limited to the screen size.
What is the adapter responsible for?
An Adapter object acts as a bridge between an AdapterView and the underlying data for that view. The Adapter provides access to the data items. The Adapter is also responsible for making a View for each item in the data set.
Why is RecyclerView called RecyclerView?
RecyclerView as its name suggests recycles Views once they get out of scope (screen) with the help of ViewHolder pattern.
How do I know if my RecyclerView is empty?
You can check if your adapter. getItemCount() is returning 0. If its 0, then, your recyclerView has no items to show.
What is onBindViewHolder in Android?
onBindViewHolder(VH holder, int position) Called by RecyclerView to display the data at the specified position. void. onBindViewHolder(VH holder, int position, List<Object> payloads) Called by RecyclerView to display the data at the specified position.