이 예는 Android 앱에서 Recycler View로 작업하는 방법을 보여줍니다.
1단계 − Android Studio에서 새 프로젝트를 생성하고 파일 ⇒ 새 프로젝트로 이동하여 필요한 모든 세부 정보를 입력하여 새 프로젝트를 생성합니다.
2단계 − res/layout/activity_main.xml에 다음 코드를 추가합니다.
<?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="match_parent" /> </LinearLayout>
3단계 − src/MainActivity.java
에 다음 코드 추가package 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); LinearLayoutManager mLayoutManager = new LinearLayoutManager(getApplicationContext()); recyclerView.setLayoutManager(mLayoutManager); 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 MovieModel", "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(); } }
4단계 − src/MovieModel.java에 다음 코드 추가
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 name) { this.title = name; } 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; } }
5단계 − res/layout/movies_list.xml에 다음 코드를 추가합니다.
<?xml version="1.0" encoding="utf-8"?> <androidx.cardview.widget.CardView xmlns:android="https://schemas.android.com/apk/res/android" android:layout_width=" match_parent" 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>
6단계 − src/MoviesAdapter.java
에 다음 코드 추가package 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; 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(); } }
7단계 − androidManifest.xml에 다음 코드 추가
<?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>
응용 프로그램을 실행해 보겠습니다. 실제 Android 모바일 장치를 컴퓨터에 연결했다고 가정합니다. Android 스튜디오에서 앱을 실행하려면 프로젝트의 활동 파일 중 하나를 열고 실행을 클릭합니다. 도구 모음의 아이콘입니다. 모바일 장치를 옵션으로 선택한 다음 기본 화면을 표시할 모바일 장치를 확인하십시오 –