RecyclerView 만들기

먼저 RecyclerView를 만들기 위해서 

앱 build.gradle에 appcompatV7와 recycleview lib를 추가해야합니다.

compile 'com.android.support:appcompat-v7:25.0.0'
compile 'com.android.support:recyclerview-v7:25.0.0'

MainActivity

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import com.damoa.testfragment.dummy.DummyContent;

public class MainActivity extends AppCompatActivity {

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

        RecyclerView recyclerView = (RecyclerView) findViewById(R.id.test_recycler);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        recyclerView.setAdapter(new MyItemRecyclerViewAdapter(this,DummyContent.ITEMS));
    }

}

MyItemRecyclerViewAdapter

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;
import com.damoa.testfragment.dummy.DummyContent.DummyItem;

import java.util.List;


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

    private final List<DummyItem> mValues;
    private Context mContext = null;

    public MyItemRecyclerViewAdapter(Context context, List<DummyItem> items) {
        mContext = context;
        mValues = items;
    }

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

    @Override
    public void onBindViewHolder(final ViewHolder holder, final int position) {
        holder.mTitle.setText(mValues.get(position).title);

        holder.mView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(mContext,"test"+position,Toast.LENGTH_SHORT).show();
            }
        });
    }

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

    public class ViewHolder extends RecyclerView.ViewHolder {
        public final View mView;
        public final TextView mTitle;

        public ViewHolder(View view) {
            super(view);
            mView = view;
            mTitle = (TextView) view.findViewById(R.id.item_title);
        }

    }
}

DummyContent

import java.util.ArrayList;
import java.util.List;

/**
 * Helper class for providing sample content for user interfaces created by
 * Android template wizards.
 * <p>
 * TODO: Replace all uses of this class before publishing your app.
 */
public class DummyContent {

    /**
     * An array of sample (dummy) items.
     */
    public static final List<DummyItem> ITEMS = new ArrayList<DummyItem>();


    private static final int COUNT = 25;

    static {
        // Add some sample items.
        for (int i = 1; i <= COUNT; i++) {
            addItem(createDummyItem(i));
        }
    }

    private static void addItem(DummyItem item) {
        ITEMS.add(item);
    }

    private static DummyItem createDummyItem(int position) {
        return new DummyItem(String.valueOf(position)+"Item "+ position);
    }

    private static String makeDetails(int position) {
        StringBuilder builder = new StringBuilder();
        builder.append("Details about Item: ").append(position);
        for (int i = 0; i < position; i++) {
            builder.append("\nMore details information here.");
        }
        return builder.toString();
    }

    /**
     * A dummy item representing a piece of content.
     */
    public static class DummyItem {
        public final String title;

        public DummyItem(String id) {
            this.title = id;
        }
    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.damoa.testfragment.MainActivity">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/test_recycler"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
</RelativeLayout>

recycler_item.xml

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

    <TextView
        android:id="@+id/item_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="@dimen/text_margin"
        android:textAppearance="?attr/textAppearanceListItem" />

</LinearLayout>