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A brief look at how Adapters work with RecyclerViews in the MVC design pattern.
Android Parcelable Interface
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[MUSIC]
0:00
Welcome back.
0:04
We've set up our user interface,
the view portion of the MVC pattern.
0:06
The model portion,
0:11
our Hour class, will need a little more
work down the road, but nothing too major.
0:12
I wan to turn our attention, at least for
0:18
a little bit here, to the controller
portion of the MVC design pattern.
0:20
I've mentioned adapter and
view holders a couple of times now.
0:24
But what are they exactly?
0:28
And how do they all fit together?
0:30
When we use a RecyclerView,
there are a few bits and pieces we need.
0:33
We have data, our array of hourly info for
this project.
0:38
And we have a RecyclerView.
0:42
What we need to do to display
the data in the RecyclerView?
0:44
A common design pattern in Android
is to use a special component
0:48
called an adapter to, well,
adapt data for the view.
0:52
We set the data for the adapter and
0:57
let the adapter do its magic to make the
data look nice inside the RecyclerView.
0:59
The other pieces to the puzzle
are a LayoutManager,
1:05
which manages the positioning
of the items.
1:08
And a ViewHolder,
which as the name would indicate,
1:11
holds the views we added
to our list item layout.
1:14
Our task then are to, first,
1:18
create an Adapter to handle the data
collection and bind it to the View.
1:19
Create a ViewHolder inside the Adapter.
1:25
Connect the Adapter to the Activity.
1:29
And assign a LayoutManager
to manage the item position.
1:31
Something to note here.
1:36
Since we're using the Android Data Binding
Library, many of the data binding tasks
1:38
that move data around the list and
RecyclerView are handled for us.
1:43
There are other ways outside the Data
Binding Library to accomplish these tasks.
1:47
And I've put links in the teacher's notes
for further reading in case you come
1:51
across a different method
in your development career.
1:55
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