android studio recyclerview button click

#Android studio recyclerview button click update

Internal inner class MyViewHolder(view: View) : RecyclerView. Internal class CustomAdapter(private var itemsList: List) : We are setting this size with the the size of ArrayList itemsList in which we are storing the strings.ĬustomAdapter.kt package

getItemCount() sets the number of elements to be displayed in the RecyclerView.

#Android studio recyclerview button click update

And we can use this item (String in this case) to update MyViewHolder widget that is displayed as item (LinearLayout with TextView) in the RecyclerView. Using the position, we can get the item from the items list.

onBindViewHolder() gets the MyViewHolder widget for each item, and the position of the item as arguments. However, in a newer version of Android Studio, you can click the download icon beside RecyclerView in Palette, and Android Studio will add it automatically.

onCreateViewHolder() creates the MyViewHolder widget for each item, with the specified item.xml layout.

In Custom Adaptor class, we override three methods that are responsible for creating and setting values for the items in RecyclerView. This adapter takes care of populating the items in it with values. We will need this id to set this TextView’s text with the item’s string value.Ĭreate a custom Adapter that extends RecyclerView.Adapter. Please note the id of the TextView itemTextView. This layout file is used to display each item in the RecylcerView widget.Įach item in the RecyclerView is displayed as a LinearLayout with a single TextView in it. The width and height of this RecyclerView widget match the parent.Ĭreate a layout file item.xml.

Please note the id we provided for this RecyclerView widget.

Add RecyclerView widget to activity_main.xml.