안드로이드 RecyclerView 만들기

1. activity_main.xml에 RecyclerView 추가

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical"
    tools:context=".MainActivity" >

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

 

2. 데이터를 담을 클래스 생성 및 설정 (Menu.java)

package org.techtown.recyclerview;

public class Menu {
    String name;
    String price;

    public Menu(String name,String price){
        this.name=name;
        this.price=price;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPrice() {
        return price;
    }

    public void setPrice(String price) {
        this.price = price;
    }
}

 

3. menu_item.xml 생성 ( RecyclerView에 표시될 Layout)

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="horizontal">

        <ImageView
            android:id="@+id/imageView"
            android:layout_width="80dp"
            android:layout_height="80dp"
            app:srcCompat="@mipmap/ic_launcher" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <TextView
                android:id="@+id/textView"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="메뉴"
                android:textSize="25sp"
                />

            <TextView
                android:id="@+id/textView2"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="가격"
                android:textSize="25sp"
                />
        </LinearLayout>
    </LinearLayout>

</LinearLayout>

 

4. Adapter 생성 및 설정(MenuAdapter.java)

package org.techtown.recyclerview;

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.ArrayList;

public class MenuAdapter extends RecyclerView.Adapter<MenuAdapter.ViewHolder>{
    ArrayList<Menu> items = new ArrayList<Menu>();


    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int viewType) {
        LayoutInflater inflater=LayoutInflater.from(viewGroup.getContext());
        View itemView =inflater.inflate(R.layout.menu_item,viewGroup,false);

        return new ViewHolder(itemView);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder viewholder, int position) {
        Menu item = items.get(position);
        viewholder.setItem(item);
    }

    @Override
    public int getItemCount() {
        return items.size();
    }

    static class ViewHolder extends RecyclerView.ViewHolder{
        TextView textView;
        TextView textView2;

        public ViewHolder(View itemView){
            super(itemView);

            textView=itemView.findViewById(R.id.textView);
            textView2=itemView.findViewById(R.id.textView2);

        }
        public void setItem(Menu item){
            textView.setText(item.getName());
            textView2.setText(item.getPrice());
        }


    }
    public void addItem(Menu item){
        items.add(item);
    }
    public void setItems(ArrayList<Menu> items){
        this.items=items;
    }
    public Menu getItem(int position){
        return items.get(position);
    }
    public void setItem(int position,Menu item){
        items.set(position,item);
    }
}

 

5. MainActivity 설정

package org.techtown.recyclerview;

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import android.app.Person;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        RecyclerView recyclerView = findViewById(R.id.recyclerView);

        LinearLayoutManager layoutManager = new LinearLayoutManager(this,LinearLayoutManager.VERTICAL,false);
        recyclerView.setLayoutManager(layoutManager);
        MenuAdapter adapter = new MenuAdapter();

        adapter.addItem(new Menu("후라이드 치킨","15000원"));
        adapter.addItem(new Menu("앙념 치킨","16000원"));
        adapter.addItem(new Menu("간장 치킨","17000원"));
        recyclerView.setAdapter(adapter);

    }
}

 

6. 실행 화면