What is a RecyclerView in Android?

What is a RecyclerView in Android?

RecyclerView is the ViewGroup that contains the views corresponding to your data. It’s a view itself, so you add RecyclerView into your layout the way you would add any other UI element. Each individual element in the list is defined by a view holder object.

Is ListView better than 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.

How can create RecyclerView in Android with example?

Using the RecyclerView

  1. Define a model class to use as the data source.
  2. Add a RecyclerView to your activity to display the items.
  3. Create a custom row layout XML file to visualize the item.
  4. Create a RecyclerView. Adapter and ViewHolder to render the item.
  5. Bind the adapter to the data source to populate the RecyclerView.

What is difference between CardView and RecyclerView?

The RecyclerView is a more advanced and more flexible version of the ListView. This new component is a big step because the ListView is one of the most used UI widgets. The CardView widget, on the other hand, is a new component that does not “upgrade” an existing component.

What is the purpose of RecyclerView?

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.

How does RecyclerView work?

RecyclerView does not allocate an item view for every item in your data source. Instead, it allocates only the number of item views that fit on the screen(Viewport) and it reuses those item layouts as the user scrolls.

When should I use RecyclerView?

RecyclerView is powerful when you need to customize your list or you want better animations. Those convenience methods in ListView caused a lot of trouble to people which is why RecyclerView provides a more flexible solution to them. The major change you need to make for migration is in your adapter.

What is RecyclerView and CardView in Android?

CardView: CardView is an extended version of Framelayout which can be used to show items inside the card format. With the help of CardView, we can add radius, elevation to our items of RecyclerView. CardView gives a rich look and feels to our list of data. RecyclerView: RecyclerView is an extended version of ListView.

What is an example of RecyclerView?

The RecyclerView class extends the ViewGroup class and implements ScrollingView interface. It is introduced in Marshmallow. It is an advanced version of the ListView with improved performance and other benefits.

What is RecyclerView Kotlin?

A RecyclerView is an advanced version of ListView with improved performance. When you have a long list of items to show you can use RecyclerView. It has the ability to reuse its views. In RecyclerView when the View goes out of the screen or not visible to the user it won’t destroy it, it will reuse these views.

What is view holder in RecyclerView?

A ViewHolder describes an item view and metadata about its place within the RecyclerView. RecyclerView. Adapter implementations should subclass ViewHolder and add fields for caching potentially expensive View. findViewById(int) results.

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