creating android adapters listview android studio

The RecyclerView.Adapter requires a ViewHolder.To be able to bring the above sketch to life, we'll need the following code pieces. Let's look at this image one more time, as we are about to build something very similar: It also converts a Java object into an individual list item View to be inserted and displayed to the user. The RecyclerView.Adapter, much like the built-in Android ArrayAdapter, will populate the data into the RecyclerView. * Every RecyclerView must also be backed by a model - this means that it can parse or lay out a specific Object. * StaggeredGridLayoutManager: Displays items in a more staggered grid. * GridLayoutManager: Displays items in a grid. * LinearLayoutManager: Displays items in a vertical or horizontal scrolling list. There are three built-in LayoutManager options: The LayoutManager knows the size of the layout, and can compute how much space needs to be reserved to show the optimum amount of entries. A LayoutManager is responsible for positioning individual item views inside the RecyclerView.To use a RecyclerView widget, you must also include its corresponding RecyclerView.Adapter and LayoutManager.(This will come in handy later, when we add functionality to display content horizontally or vertically depending on the device orientation). It's similar to a ListView, but with many updated features, including the ability to implement both horizontal and vertical lists. The RecyclerView is a newer Android ViewGroup object meant to render any adapter-based View. Required Readingīegin by reading CodePath's article Using the Recycler View. Because the objects we are passing around and parsing into custom layouts are about to get more complex, we will spend some time learning about a powerful new tool to process information into a repeating layout: A RecyclerView. Often though, we'll want to display more than just a single string, and we'll want to use our own layout. We've altered those ArrayAdapters to be able to pass additional data, and we have made a simple custom adapter to work with a simple layout. So far, we only used Android's built-in ArrayAdapters to display lists of information in an activity. If you experience errors after adding the RecyclerView library, see the Addressing Version Incompatibility section at the end of this lesson.

Note: In some cases, adding the RecyclerView dependency library can lead to version incompatibility errors.

Creating android adapters listview android studio