RecyclerView 목록 만들기

main.xml

<?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">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="20dp"
        android:text="친구 목록"
        android:textSize="20sp"
        android:textColor="#BA6666"
        android:textStyle="bold"/>

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


</LinearLayout>

 

item_recyclerview.xml

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

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center_vertical"
        android:padding="20dp">

        <!--프로필 사진-->
        <ImageView
            android:id="@+id/profile"
            android:layout_width="40dp"
            android:layout_height="40dp"
            android:src="@drawable/person"/>

        <!--이름-->
        <TextView
            android:id="@+id/name"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="20dp"
            android:text="이름"
            android:textSize="16sp"
            android:textColor="#000"/>

        <!--상태 메시지-->
        <TextView
            android:id="@+id/message"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="100dp"
            android:text="상태메시지"
            android:textSize="12sp"
            android:textColor="#444"
            android:maxLines="1"/>

    </LinearLayout>

    <!--구분선-->
    <View
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:layout_marginHorizontal="10dp"
        android:background="#aaa"/>

</LinearLayout>

 

main.activity

public class MainActivity extends AppCompatActivity {

    private RecyclerView mRecyclerView;
    private MyRecyclerAdapter mRecyclerAdapter;
    private ArrayList<FriendItem> mfriendItems;

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

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

        /* initiate adapter */
        mRecyclerAdapter = new MyRecyclerAdapter();

        /* initiate recyclerview */
        mRecyclerView.setAdapter(mRecyclerAdapter);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
        mRecyclerView.setLayoutManager(new LinearLayoutManager(this, RecyclerView.VERTICAL,false));

        /* adapt data */
        mfriendItems = new ArrayList<>();
        for(int i=1;i<=10;i++){
            if(i%2==0)
                mfriendItems.add(new FriendItem(R.drawable.person,i+"번째 사람",i+"번째 상태메시지"));
            else
                mfriendItems.add(new FriendItem(R.drawable.person,i+"번째 사람",i+"번째 상태메시지"));

        }
        mRecyclerAdapter.setFriendList(mfriendItems);
    }
}

 

MyRecyclerAdapter.activity

public class MyRecyclerAdapter extends RecyclerView.Adapter<MyRecyclerAdapter.ViewHolder> {

    private ArrayList<FriendItem> mFriendList;

    @NonNull
    @Override
    public MyRecyclerAdapter.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_recyclerview, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull MyRecyclerAdapter.ViewHolder holder, int position) {
        holder.onBind(mFriendList.get(position));
    }

    public void setFriendList(ArrayList<FriendItem> list){
        this.mFriendList = list;
        notifyDataSetChanged();
    }

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

    class ViewHolder extends RecyclerView.ViewHolder {
        ImageView profile;
        TextView name;
        TextView message;

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

            profile = (ImageView) itemView.findViewById(R.id.profile);
            name = (TextView) itemView.findViewById(R.id.name);
            message = (TextView) itemView.findViewById(R.id.message);
        }

        void onBind(FriendItem item){
            profile.setImageResource(item.getResourceId());
            name.setText(item.getName());
            message.setText(item.getMessage());
        }
    }
}

 

FriendItem.java

public class FriendItem {
    String name;
    String message;
    int resourceId;

    public FriendItem(int resourceId, String name, String message) {
        this.name = name;
        this.message= message;
        this.resourceId = resourceId;
    }

    public int getResourceId() {
        return resourceId;
    }

    public String getMessage() {
        return message;
    }

    public String getName() {
        return name;
    }

    public void setMessage(String message) {
        this.message = message;
    }

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

    public void setResourceId(int resourceId) {
        this.resourceId = resourceId;
    }
}

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결과 값