要Groupie&DataBinding
dependencies {
implementation 'androidx.recyclerview:recyclerview:1.1.0'
// groupie
implementation 'com.xwray:groupie:2.7.2'
implementation 'com.xwray:groupie-kotlin-android-extensions:2.7.2'
implementation 'com.xwray:groupie-databinding:2.7.2'
}
class ListItem(private val text: String): BindableItem<ItemListBinding>() {
override fun getLayout(): Int = R.layout.item_list
override fun bind(viewBinding: ItemListBinding, position: Int) {
viewBinding.text = text
}
}
class MainFragment : Fragment() {
override fun onCreateView(
inflater: LayoutInflater,
container: ViewGroup?,
savedInstanceState: Bundle?
): View? = inflater.inflate(R.layout.fragment_main, container, false)
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
val groupAdapter = GroupAdapter<GroupieViewHolder>()
recycler_view.adapter = groupAdapter
val items = listOf("りんご🍎", "みかん🍊", "ぶどう🍇", "すいか🍉", "もも🍑", "ばなな🍌")
items.forEach { item ->
groupAdapter.add(ListItem(item))
}
}
}
<?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"
xmlns:tools="http://schemas.android.com/tools">
<data>
<variable
name="text"
type="String" />
</data>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="100dp">
<TextView
android:id="@+id/textView"
android:text="@{text}"
android:textSize="20sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
tools:text="くだもの" />
</androidx.constraintlayout.widget.ConstraintLayout>
</layout>
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainFragment">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layoutManager="LinearLayoutManager" />
</androidx.constraintlayout.widget.ConstraintLayout>