ตัวอย่างนี้สาธิตวิธีสร้างรายการเลื่อนแนวนอน (Horizontal List) ใน Android โดยใช้ RecyclerView + LinearLayoutManager.HORIZONTAL ซึ่งเป็นวิธีมาตรฐานปัจจุบัน (แทน HorizontalListView ที่ Deprecated)
ขั้นตอนที่ 1: สร้างโปรเจกต์ใหม่
Android Studio → File → New Project
ขั้นตอนที่ 2: Dependencies (build.gradle)
dependencies {
implementation 'androidx.recyclerview:recyclerview:1.3.0'
implementation 'androidx.cardview:cardview:1.0.0'
}
ขั้นตอนที่ 3: Layout หลัก (res/layout/activity_main.xml)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="https://schemas.android.com/apk/res/android"
android:id="@+id/rlMain"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="16dp"
android:orientation="vertical">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
ขั้นตอนที่ 4: Model Class (MovieModel.java)
package app.com.sample;
public class MovieModel {
private String title, genre, year;
public MovieModel() {}
public MovieModel(String title, String genre, String year) {
this.title = title;
this.genre = genre;
this.year = year;
}
public String getTitle() { return title; }
public void setTitle(String title) { this.title = title; }
public String getYear() { return year; }
public void setYear(String year) { this.year = year; }
public String getGenre() { return genre; }
public void setGenre(String genre) { this.genre = genre; }
}
ขั้นตอนที่ 5: Item Layout (res/layout/movie_list.xml)
<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView xmlns:android="https://schemas.android.com/apk/res/android"
android:layout_width="250dp"
android:layout_height="100dp"
android:layout_margin="8dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="8dp">
<TextView
android:id="@+id/title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_toStartOf="@+id/year"
android:textColor="#222222"
android:textSize="16sp"
android:textStyle="bold" />
<TextView
android:id="@+id/year"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:textColor="#999999" />
<TextView
android:id="@+id/genre"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true" />
</RelativeLayout>
</androidx.cardview.widget.CardView>
ขั้นตอนที่ 6: Adapter (MoviesAdapter.java)
package app.com.sample;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import java.util.List;
public class MoviesAdapter extends RecyclerView.Adapter<MoviesAdapter.MyViewHolder> {
private List<MovieModel> moviesList;
static class MyViewHolder extends RecyclerView.ViewHolder {
TextView title, year, genre;
MyViewHolder(View view) {
super(view);
title = view.findViewById(R.id.title);
genre = view.findViewById(R.id.genre);
year = view.findViewById(R.id.year);
}
}
public MoviesAdapter(List<MovieModel> moviesList) {
this.moviesList = moviesList;
}
@NonNull
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.movie_list, parent, false);
return new MyViewHolder(itemView);
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
MovieModel movie = moviesList.get(position);
holder.title.setText(movie.getTitle());
holder.genre.setText(movie.getGenre());
holder.year.setText(movie.getYear());
}
@Override
public int getItemCount() {
return moviesList.size();
}
}
ขั้นตอนที่ 7: MainActivity.java
package app.com.sample;
import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.DefaultItemAnimator;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private List<MovieModel> movieList = new ArrayList<>();
private MoviesAdapter mAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
RecyclerView recyclerView = findViewById(R.id.recyclerView);
mAdapter = new MoviesAdapter(movieList);
// 🔑 สำคัญ: ตั้งค่า Orientation เป็น HORIZONTAL
LinearLayoutManager layoutManager = new LinearLayoutManager(this);
layoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);
recyclerView.setLayoutManager(layoutManager);
recyclerView.setItemAnimator(new DefaultItemAnimator());
recyclerView.setAdapter(mAdapter);
prepareMovieData();
}
private void prepareMovieData() {
MovieModel movie = new MovieModel("Mad Max: Fury Road", "Action & Adventure", "2015");
movieList.add(movie);
movie = new MovieModel("Inside Out", "Animation, Kids & Family", "2015");
movieList.add(movie);
movie = new MovieModel("Star Wars: Episode VII - The Force Awakens", "Action", "2015");
movieList.add(movie);
movie = new MovieModel("Shaun the Sheep", "Animation", "2015");
movieList.add(movie);
movie = new MovieModel("The Martian", "Science Fiction & Fantasy", "2015");
movieList.add(movie);
movie = new MovieModel("Mission: Impossible Rogue Nation", "Action", "2015");
movieList.add(movie);
movie = new MovieModel("Up", "Animation", "2009");
movieList.add(movie);
movie = new MovieModel("Star Trek", "Science Fiction", "2009");
movieList.add(movie);
movie = new MovieModel("The LEGO Movie", "Animation", "2014");
movieList.add(movie);
movie = new MovieModel("Iron Man", "Action & Adventure", "2008");
movieList.add(movie);
movie = new MovieModel("Aliens", "Science Fiction", "1986");
movieList.add(movie);
movie = new MovieModel("Chicken Run", "Animation", "2000");
movieList.add(movie);
movie = new MovieModel("Back to the Future", "Science Fiction", "1985");
movieList.add(movie);
movie = new MovieModel("Raiders of the Lost Ark", "Action & Adventure", "1981");
movieList.add(movie);
movie = new MovieModel("Goldfinger", "Action & Adventure", "1965");
movieList.add(movie);
movie = new MovieModel("Guardians of the Galaxy", "Science Fiction & Fantasy", "2014");
movieList.add(movie);
mAdapter.notifyDataSetChanged();
}
}
ขั้นตอนที่ 8: AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="https://schemas.android.com/apk/res/android"
package="app.com.sample">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
การปรับแต่งเพิ่มเติม
เพิ่ม Snap Helper (จับตำแหน่ง Item ให้ตรงกลาง)
// ติดตั้งใน onCreate SnapHelper snapHelper = new LinearSnapHelper(); snapHelper.attachToRecyclerView(recyclerView);
ใช้ PagerSnapHelper (คลิก Page View)
PagerSnapHelper pagerSnapHelper = new PagerSnapHelper(); pagerSnapHelper.attachToRecyclerView(recyclerView);
เพิ่ม Divider ระหว่าง Item
DividerItemDecoration divider = new DividerItemDecoration(
recyclerView.getContext(),
LinearLayoutManager.HORIZONTAL
);
divider.setDrawable(ContextCompat.getDrawable(this, R.drawable.divider_horizontal));
recyclerView.addItemDecoration(divider);
ทำไมต้องใช้ RecyclerView แทน ListView แนวนอนเก่า?
- ✅ Performance ดีกว่า (ViewHolder Pattern)
- ✅ รองรับ Animation, ItemDecoration, SnapHelper
- ✅ LayoutManager แยก Logic การจัดวาง (Horizontal/Vertical/Grid/Staggered)
- ✅ HorizontalListView library เก่าหยุดพัฒนาแล้ว
การทดสอบ
รันแอป → จะเห็นรายการหนังแบบ Card View เลื่อนได้แนวนอน (Horizontal Scroll)