RecyclerView + Data Binding Sample
Use LiveData directly with data binding
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<data>
<variable
name="viewModel"
type="com.ciandt.recyclerviewbinding.presentation.simple.SimpleViewModel" />
</data>
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="@+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:items="@{viewModel.items}" /> <!-- Use android data binding to update adapter -->
</android.support.constraint.ConstraintLayout>
</layout>class SimpleViewModel : ViewModel() {
val items: LiveData<List<String>> =
MutableLiveData<List<String>>().apply { value = ItemsRepository().getItemsPage() }
}Simple RecyclerView Setup
class SimpleFragment : Fragment() {
...
override fun onActivityCreated(savedInstanceState: Bundle?) {
super.onActivityCreated(savedInstanceState)
viewModel = ViewModelProviders.of(this)[SimpleViewModel::class.java]
val layoutManager = LinearLayoutManager(context)
recyclerView.layoutManager = layoutManager
recyclerView.hasFixedSize()
recyclerView.adapter = ItemsAdapter()
recyclerView.addItemDecoration(DividerItemDecoration(context, layoutManager.orientation))
binding.viewModel = viewModel
}
}Endless Scroll sample (accessibility support)
class EndlessFragment : Fragment() {
...
override fun onActivityCreated(savedInstanceState: Bundle?) {
super.onActivityCreated(savedInstanceState)
viewModel = ViewModelProviders.of(this)[EndlessViewModel::class.java]
val layoutManager = LinearLayoutManager(context)
recyclerView.layoutManager = layoutManager
recyclerView.hasFixedSize()
recyclerView.adapter = ItemsAdapter()
recyclerView.addItemDecoration(DividerItemDecoration(context, layoutManager.orientation))
// USE EXTENSION TO SIMPLIFY ENDLESS SETUP
recyclerView.endless { viewModel.fetchItems() }
// USE EVENT WRAPPER TO NOTIFY CHANGES TO ADAPTER
//https://bit.ly/2NeeTMP [LiveData with SnackBar, Navigation and other events (the SingleLiveEvent case)]
viewModel.updateList.subscribe(this) {
recyclerView.adapter.notifyDataSetChanged()
}
binding.viewModel = viewModel
}
}MIT License
Copyright (c) 2018 CI&T Mobile Team
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
