Android Lists

dependencies {
    // ...
    implementation "androidx.recyclerview:recyclerview:1.2.1"
    // ... 
}  

<androidx.recyclerview.widget.RecyclerView
    android:id="@+id/list"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

RecyclerView recyclerView = findViewById(R.id.list);
recyclerView.setLayoutManager(new LinearLayoutManager(this));

recyclerView.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false));

recyclerView.setLayoutManager(new GridLayoutManager(this, 3));

class ViewHolder(itemView: View): RecyclerView.ViewHolder(itemView) {
    val itemNumberView: TextView = itemView.findViewById(R.id.item_number)
    val contentView: TextView = itemView.findViewById(R.id.content)
}

class MovieAdapter(private val list: List<DummyItem>, private val movieClickListener: MovieClickListener): RecyclerView.Adapter<MovieAdapter.ViewHolder>() {

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {

        val view = LayoutInflater.from(parent.context).inflate(R.layout.movie_view, parent, false)
        return ViewHolder(view)
    }

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        val dummyItemModel = list[position]
        holder.itemNumberView.text = dummyItemModel.id
        holder.contentView.text = dummyItemModel.content
    }

    override fun getItemCount(): Int {
        return list.size
    }

    class ViewHolder(itemView: View): RecyclerView.ViewHolder(itemView) {
        ...
    }
}

val recyclerView = findViewById<RecyclerView>(R.id.list)
recyclerView.layoutManager = LinearLayoutManager(this)
recyclerView.addItemDecoration(DividerItemDecoration(this, DividerItemDecoration.VERTICAL))

val adapter = MovieAdapter(data)
recyclerView.adapter = adapter

<?xml version="1.0" encoding="utf-8"?>
<!-- activity_main3.xml -->
<androidx.recyclerview.widget.RecyclerView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/list"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

<?xml version="1.0" encoding="utf-8"?>
<!-- list_item_view.xml -->
<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="wrap_content">

    <TextView
        android:id="@+id/item_number"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="TextView"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/content"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:text="TextView"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/item_number" />
</androidx.constraintlayout.widget.ConstraintLayout>

package de.hdmstuttgart.manifestdemo;

import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.recyclerview.widget.DividerItemDecoration
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView

class MainActivity : AppCompatActivity(), MovieClickListener {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val recyclerView = findViewById<RecyclerView>(R.id.list)
        recyclerView.layoutManager = LinearLayoutManager(this)
        recyclerView.addItemDecoration(DividerItemDecoration(this, DividerItemDecoration.VERTICAL))

        val list: MutableList<DummyItem> = ArrayList<DummyItem>()
        for (i in 0..100) {
            list.add(DummyItem(i.toString(), " - "))
        }

        val adapter = MovieAdapter(data)
        recyclerView.adapter = adapter
    }

    class DummyItem(var id: String, var content: String)

    class MovieAdapter(private val list: List<DummyItem>, private val movieClickListener: MovieClickListener): RecyclerView.Adapter<MovieAdapter.ViewHolder>() {

        override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {

            val view = LayoutInflater.from(parent.context).inflate(R.layout.movie_view, parent, false)
            return ViewHolder(view)
        }

        override fun onBindViewHolder(holder: ViewHolder, position: Int) {
            val dummyItemModel = list[position]
            holder.itemNumberView.text = dummyItemModel.id
            holder.contentView.text = dummyItemModel.content
        }

        override fun getItemCount(): Int {
            return list.size
        }

        class ViewHolder(itemView: View): RecyclerView.ViewHolder(itemView) {
            val itemNumberView: TextView = itemView.findViewById(R.id.item_number)
            val contentView: TextView = itemView.findViewById(R.id.content)
        }
    }
}