What is onCreateViewHolder?
onCreateViewHolder only creates a new view holder when there are no existing view holders which the RecyclerView can reuse. So, for instance, if your RecyclerView can display 5 items at a time, it will create 5-6 ViewHolders , and then automatically reuse them, each time calling onBindViewHolder .
What is RecyclerView?
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.
How many types of position related methods are in RecyclerView?
two types
For this reason, there are two types of position related methods in RecyclerView: layout position: Position of an item in the latest layout calculation. This is the position from the LayoutManager’s perspective. adapter position: Position of an item in the adapter.
What is the difference between ListView and RecyclerView?
Summary. RecyclerView has greater support for LayoutManagement including vertical lists, horizontal lists, grids and staggered grids. ListView only supports vertical lists. ListView starts by default with dividers between items and requires customisation to add decorations.
What is the use of onCreateViewHolder?
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.
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.
How does kotlin create RecyclerView with multiple view types?
Android and Kotlin: RecyclerView with multiple view types
- Let’s create our data structure 1st.
- Create the viewHolder class with Kotlin and sealed class magic: class DataAdapterViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) { private fun bindFamily(item: DataModel.Family) {
Is RecyclerView deprecated?
Today, suddenly Recyclerview. Viewholder became deprecated. Other, android project is no deprecated.
Is RecyclerView faster than ListView?
As all of you know, Google have released RecyclerView for years. It is not a replacement for ListView, however significantly improvement in performance and also a bit more complex to implement.
Why is a ListView views so efficient?
ListView is designed for scalability and performance. In practice, this essentially means: It tries to do as few view inflations as possible. It only paints and lays out children that are (or are about to become) visible on screencode.