<android.support.v7.widget.RecyclerView
 android:id="@+id/recyclerview_content"
 style="?recyclerview_style"
 android:scrollbars="vertical"
 android:fadeScrollbars="true"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:layout_marginBottom="-55dp" />

 class HomeAdapter extends RecyclerView.Adapter<HomeAdapter.MyViewHolder>
 {

 @Override
 public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType)
 {
   MyViewHolder holder = new MyViewHolder(LayoutInflater.from(
       HomeActivity.this).inflate(R.layout.item_home, parent,
       false));
   return holder;
 }

 @Override
 public void onBindViewHolder(MyViewHolder holder, int position)
 {
   holder.tv.setText(mDatas.get(position));
 }

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

 class MyViewHolder extends ViewHolder
 {
   TextView tv;

   public MyViewHolder(View view)
   {
     super(view);
     tv = (TextView) view.findViewById(R.id.id_num);
   }
 }
}

class MyViewHolder extends ViewHolder{
  TextView tv;    
  public MyViewHolder(Context context, View view){
     super(view);
     tv = (TextView) view.findViewById(R.id.id_num);

     //当然，我们也可以在这里使用view来对RecyclerView的一个item进行事件监听,也可以使用 
     //tv等子控件来实现item的子控件的事件监听。这也是我之所以要传context的原因之一呢～
     ......
  }

  public static MyViewHolder newInstance(Activity context, ViewGroup parent){
      View view = LayoutInflater.from(
       context).inflate(R.layout.item_home, parent,false);
     return new MyViewHolder(context, view);
  }
 }  

 //你没看错，数据绑定也被整合进来了， 
 //将adapter里的数据根据position获取到后传进来。当然，也可以根据具体情况来做调整。
  public void onBinViewHolder(String data){   
    tv.setText(data);//既然这里也有子控件，那么这里也可以做item子控件的事件监听喽
}

class HomeAdapter extends RecyclerView.Adapter<MyViewHolder>{
 @Override
 public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType){//如需要，还要对viewType做判断
   return MyViewHolder.newInstance(this, parent)
 }

 @Override
 public void onBindViewHolder(MyViewHolder holder, int position){
   holder.onBindViewHolder(mDatas.get(position));
 }

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

class HomeAdapter extends RecyclerView.Adapter<MyViewHolder>{
 private OnItemClickListener mOnItemClickListener;

 public void setOnItemClickLitener(OnItemClickLitener mOnItemClickLitener) 
 { 
   this.mOnItemClickLitener = mOnItemClickLitener; 
 } 

 @Override
 public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType){//如需要，还要对viewType做判断
   return MyViewHolder.newInstance(this, parent)
 }

 @Override
 public void onBindViewHolder(MyViewHolder holder, int position){
   holder.onBindViewHolder(mDatas.get(position));

   //如果设置了回调，则设置点击事件 
   if (mOnItemClickLitener != null) { 
     viewHolder.itemView.setOnClickListener(new OnClickListener() { 
       @Override 
       public void onClick(View v) { 
         mOnItemClickLitener.onItemClick(viewHolder.itemView, i); 
       } 
     }); 
   } 
 }

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

 public interface OnItemClickLitener { 
   void onItemClick(View view, int position); 
 } 
}

 mAdapter.setOnItemClickLitener(new OnItemClickLitener() { 
 @Override 
 public void onItemClick(View view, int position) { 
   ......
 } 
});

package com.zhy.sample.demo_recyclerview;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.RecyclerView.State;
import android.util.Log;
import android.view.View;

public class DividerItemDecoration extends RecyclerView.ItemDecoration {

  private static final int[] ATTRS = new int[]{
      android.R.attr.listDivider
  };

  public static final int HORIZONTAL_LIST = LinearLayoutManager.HORIZONTAL;

  public static final int VERTICAL_LIST = LinearLayoutManager.VERTICAL;

  private Drawable mDivider;

  private int mOrientation;

  public DividerItemDecoration(Context context, int orientation) {
    final TypedArray a = context.obtainStyledAttributes(ATTRS);
    mDivider = a.getDrawable(0);
    a.recycle();
    setOrientation(orientation);
  }

  public void setOrientation(int orientation) {
    if (orientation != HORIZONTAL_LIST && orientation != VERTICAL_LIST) {
      throw new IllegalArgumentException("invalid orientation");
    }
    mOrientation = orientation;
  }

  @Override
  public void onDraw(Canvas c, RecyclerView parent) {
    Log.v("recyclerview - itemdecoration", "onDraw()");

    if (mOrientation == VERTICAL_LIST) {
      drawVertical(c, parent);
    } else {
      drawHorizontal(c, parent);
    }

  }


  public void drawVertical(Canvas c, RecyclerView parent) {
    final int left = parent.getPaddingLeft();
    final int right = parent.getWidth() - parent.getPaddingRight();

    final int childCount = parent.getChildCount();
    for (int i = 0; i < childCount; i++) {
      final View child = parent.getChildAt(i);
      android.support.v7.widget.RecyclerView v = new android.support.v7.widget.RecyclerView(parent.getContext());
      final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
          .getLayoutParams();
      final int top = child.getBottom() + params.bottomMargin;
      final int bottom = top + mDivider.getIntrinsicHeight();
      mDivider.setBounds(left, top, right, bottom);
      mDivider.draw(c);
    }
  }

  public void drawHorizontal(Canvas c, RecyclerView parent) {
    final int top = parent.getPaddingTop();
    final int bottom = parent.getHeight() - parent.getPaddingBottom();

    final int childCount = parent.getChildCount();
    for (int i = 0; i < childCount; i++) {
      final View child = parent.getChildAt(i);
      final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
          .getLayoutParams();
      final int left = child.getRight() + params.rightMargin;
      final int right = left + mDivider.getIntrinsicHeight();
      mDivider.setBounds(left, top, right, bottom);
      mDivider.draw(c);
    }
  }

  @Override
  public void getItemOffsets(Rect outRect, int itemPosition, RecyclerView parent) {
    if (mOrientation == VERTICAL_LIST) {
      outRect.set(0, 0, 0, mDivider.getIntrinsicHeight());
    } else {
      outRect.set(0, 0, mDivider.getIntrinsicWidth(), 0);
    }
  }
}

addItemDecoration(new DividerItemDecoration(this,
DividerItemDecoration.VERTICAL_LIST));

<item name="android:listDivider">@drawable/your_custom_divider</item>

<android.support.v7.widget.RecyclerView
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:scrollbars="vertical"
      >

    </android.support.v7.widget.RecyclerView>

android:scrollbars="vertical"

android:scrollbars="horizontal"

android:scrollbars="none"