एंड्रॉइड में हॉरिजॉन्टल ListView (RecyclerView) कैसे बनाएं?

एंड्रॉइड में RecyclerView से हॉरिजॉन्टल सूची बनाना

यह उदाहरण दिखाता है कि `RecyclerView` और `LinearLayoutManager.HORIZONTAL` का उपयोग करके हॉरिजॉन्टल स्क्रॉलिंग सूची कैसे बनाई जाती है।

चरण 1: नया प्रोजेक्ट बनाएं

Android Studio में File → New Project चुनकर नया प्रोजेक्ट बनाएं।

चरण 2: निर्भरताएं

build.gradle (Module: app):

dependencies {
    implementation 'androidx.recyclerview:recyclerview:1.2.1'
    implementation 'androidx.cardview:cardview:1.0.0'
}

चरण 3: मुख्य लेआउट

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>

चरण 4: आइटम लेआउट (कार्ड व्यू)

res/layout/movie_item.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="150dp"
    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>

चरण 5: डेटा मॉडल

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; }
}

चरण 6: RecyclerView एडाप्टर

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 {
    private List 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 moviesList) {
        this.moviesList = moviesList;
    }

    @NonNull
    @Override
    public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View itemView = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.movie_item, parent, false);
        return new MyViewHolder(itemView);
    }

    @Override
    public void onBindViewHolder(@NonNull 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();
    }
}

चरण 7: MainActivity - सेटअप और डेटा

MainActivity.java:

package app.com.sample;

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.DefaultItemAnimator;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.os.Bundle;
import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
    private List 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);

        // हॉरिजॉन्टल लेआउट मैनेजर - मुख्य भाग!
        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", "Action", "2015");
        movieList.add(movie);
        
        movie = new MovieModel("Shaun the Sheep", "Animation", "2015");
        movieList.add(movie);
        
        movie = new MovieModel("The Martian", "Sci-Fi & 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", "Sci-Fi", "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", "Sci-Fi & Fantasy", "2014");
        movieList.add(movie);

        mAdapter.notifyDataSetChanged();
    }
}

चरण 8: Manifest

<?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" android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>

💡 उन्नत: स्नैप-टू-सेंटर (केंद्र में आइटम स्नैप करना)

// LinearSnapHelper - फ्लिंग के बाद निकटतम आइटम पर स्नैप करता है
SnapHelper snapHelper = new LinearSnapHelper();
snapHelper.attachToRecyclerView(recyclerView);

// या PagerSnapHelper - एक समय में एक पेज (ViewPager जैसा)
SnapHelper pagerSnapHelper = new PagerSnapHelper();
pagerSnapHelper.attachToRecyclerView(recyclerView);

ऐप चलाएं

डिवाइस कनेक्ट करें, Run पर क्लिक करें। फिल्मों की हॉरिजॉन्टल स्क्रॉलिंग सूची दिखाई देगी।