MainActivity

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;


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

public class MainActivity extends AppCompatActivity {


    private RecyclerView mRecyclerView;
    private List<String> mDatas;
    private SimpleAdapter mAdapter;

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

        initView();
        mAdapter = new SimpleAdapter(this,mDatas);
        mRecyclerView.setAdapter(mAdapter);
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this,LinearLayoutManager.VERTICAL,false);
        mRecyclerView.setLayoutManager(linearLayoutManager);


    }

    private void initView() {
        mRecyclerView = (RecyclerView)findViewById(R.id.id_recyclerview);

    }

    private void initDatas() {

        mDatas = new ArrayList<String>();
        for (int i = 'A';i < 'z';i++){

            mDatas.add(""+(char)i);
        }

    }




}

1. import android.content.Context;
   import android.support.v7.widget.RecyclerView;
   import android.util.Log;
   import android.view.LayoutInflater;
   import android.view.View;
   import android.view.ViewGroup;
   import android.widget.TextView;
   
   import java.util.List;
   
   /**
    * Created by Administrator on 2016/4/17.
    */
   public class SimpleAdapter extends RecyclerView.Adapter<MyViewHolder> {
   
       private List<String> mDatas;
       private LayoutInflater mInflater;
       private Context mContext;
   
       @Override
       public int getItemCount() {
           return mDatas.size();
       }
   
       @Override
       public void onBindViewHolder(MyViewHolder holder, int pos) {
   
   
           holder.tv.setText(mDatas.get(pos));
   
   
       }
   
       @Override
       public MyViewHolder onCreateViewHolder(ViewGroup arg0, int viewType) {
   
           View view = mInflater.inflate(R.layout.item_single_textview,arg0,false);
           MyViewHolder hodler = new MyViewHolder(arg0);
   
           return hodler;
       }
   
       @Override
       public long getItemId(int position) {
           return super.getItemId(position);
       }
   
       public SimpleAdapter(Context context,List<String> datas) {
   
           this.mContext = context;
           this.mDatas = datas;
           mInflater = LayoutInflater.from(context);
   
       }
   }
   class MyViewHolder extends RecyclerView.ViewHolder{
       TextView tv;
   
       public MyViewHolder(View itemView) {
   
           super(itemView);
           tv = (TextView)itemView.findViewById(R.id.tv);
       }
   }

2. main.xml
   

3. <?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: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.qdbl.recyclerviewdemo2.MainActivity">
   
       <android.support.v7.widget.RecyclerView
           android:id="@+id/id_recyclerview"
           android:layout_width="match_parent"
           android:layout_height="wrap_content"
           android:scrollbars="vertical"/>
   
   
   
   </RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="72dp"
    android:background="#44ff0000">

    <TextView
        android:id="@+id/tv"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center" />
</FrameLayout>