首先需要v7包

如果顯示的是圖片，可以用下面這個AutoLoadRecyclerView，他可以在快速滑動時停止載入，避免OOM和記憶體資源浪費

public class AutoLoadRecyclerView extends RecyclerView {
    public AutoLoadRecyclerView(Context context) {
        this(context, null);
    }
    public AutoLoadRecyclerView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }
    public AutoLoadRecyclerView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        setOnScrollListener(new AutoLoadScrollListener(null, true, true));
    }
    /**
     * 配置顯示圖片，需要設定這幾個引數，快速滑動時，暫停圖片載入
     *
     * @param imageLoader   ImageLoader例項物件
     * @param pauseOnScroll
     * @param pauseOnFling
     */
    public void setOnPauseListenerParams(ImageLoader imageLoader, boolean pauseOnScroll, boolean pauseOnFling) {
        setOnScrollListener(new AutoLoadScrollListener(imageLoader, pauseOnScroll, pauseOnFling));
    }
    //載入更多的回撥介面
    public interface onLoadMoreListener {
        void loadMore();
    }
    /**
     * 滑動自動載入監聽器
     */
    private class AutoLoadScrollListener implements OnScrollListener {
        private ImageLoader imageLoader;
        private final boolean pauseOnScroll;
        private final boolean pauseOnFling;
        public AutoLoadScrollListener(ImageLoader imageLoader, boolean pauseOnScroll, boolean pauseOnFling) {
            super();
            this.pauseOnScroll = pauseOnScroll;
            this.pauseOnFling = pauseOnFling;
            this.imageLoader = imageLoader;
        }
        @Override
        public void onScrollStateChanged(int i) {
            //根據newState狀態做處理
            if (imageLoader != null) {
                switch (i) {
                    case 0:
                        imageLoader.resume();
                        break;
                    case 1:
                        if (pauseOnScroll) {
                            imageLoader.pause();
                        } else {
                            imageLoader.resume();
                        }
                        break;
                    case 2:
                        if (pauseOnFling) {
                            imageLoader.pause();
                        } else {
                            imageLoader.resume();
                        }
                        break;
                }
            }
        }
        @Override
        public void onScrolled(int i, int i1) {
        }
    }
}
 

接下來在佈局檔案中使用它

    <com.robosea.robofish.view.AutoLoadRecyclerView
        android:id="@+id/mRecyclerView"
        android:layout_alignParentBottom="true"
        android:layout_width="match_parent"
        android:layout_height="94px"
        android:background="@drawable/local_bottom_list_bg"
        android:paddingBottom="13px"
        android:paddingLeft="30px"
        android:paddingRight="30px"
        android:paddingTop="13px"
        android:scrollbars="none"/>
 

    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.widget.RecyclerView$LayoutManager.onMeasure(android.support.v7.widget.RecyclerView$Recycler, android.support.v7.widget.RecyclerView$State, int, int)' on a null object reference

設定佈局管理器，findViewById之後就設定

        LinearLayoutManager layoutManager = new LinearLayoutManager(this);
        layoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);
        mRecyclerView.setLayoutManager(layoutManager);

那麼RecyclerView條目的間距怎麼設定呢？使用RecyclerView的addItemDecoration方法，
方法引數依靠這個類來設定：

public class SpacesItemDecoration extends RecyclerView.ItemDecoration {
    private int space;
    public SpacesItemDecoration(int space) {
        this.space = space;
    }
    @Override
    public void getItemOffsets(Rect outRect, int itemPosition, RecyclerView parent) {
        super.getItemOffsets(outRect, itemPosition, parent);
        outRect.left = space;
        outRect.right = space;
        outRect.bottom = space;
        // Add top margin only for the first item to avoid double space between items
//        if(itemPosition == 0)
//            outRect.top = space;
    }
}

使用的時候定義一個int值，也就是間隔的畫素，傳入SpacesItemDecoration的構造引數就可以了

        int spacingInPixels = 9;
        mRecyclerView.addItemDecoration(new SpacesItemDecoration(spacingInPixels));

最後就是設定Adapter了，以下面這個Adapter為例，我們可以看到展示資料和設定條目的點選事件

public class LocalVideoGalleryAdapter extends RecyclerView.Adapter<LocalVideoGalleryAdapter.ViewHolder> {
    private Activity activity;
    private LayoutInflater mInflater;
    private List<Video> imageInfoList;
    private OnItemClickLitener mOnItemClickLitener;
    public LocalVideoGalleryAdapter(List<Video> imageInfoList, Activity activity) {
        this.imageInfoList = imageInfoList;
        this.activity = activity;
        mInflater = LayoutInflater.from(activity);
    }
    public static class ViewHolder extends RecyclerView.ViewHolder {
        public ViewHolder(View arg0) {
            super(arg0);
        }
        ImageView mImg;
    }
    @Override
    public int getItemCount() {
        return imageInfoList.size();
    }
    @Override
    public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
        View view = mInflater.inflate(R.layout.activity_index_gallery_item, viewGroup, false);
        ViewHolder viewHolder = new ViewHolder(view);
        viewHolder.mImg = (ImageView) view.findViewById(R.id.id_index_gallery_item_image);
        return viewHolder;
    }
    @Override
    public void onBindViewHolder(final ViewHolder viewHolder, final int i) {
        App.imageLoader.displayImage("file://" + imageInfoList.get(i).getPath(), viewHolder.mImg, App.options);
        if (mOnItemClickLitener != null) {
            viewHolder.itemView.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {
                    mOnItemClickLitener.onItemClick(viewHolder.itemView, i);
                }
            });
        }
    }
    public interface OnItemClickLitener {
        void onItemClick(View view, int position);
    }
    public void setOnItemClickLitener(OnItemClickLitener mOnItemClickLitener) {
        this.mOnItemClickLitener = mOnItemClickLitener;
    }
}

我們需要寫一個ViewHolder類來繼承RecyclerView.ViewHolder
在onCreateViewHolder方法中找到條目中的View
在onBindViewHolder對條目設定資料，由於RecyclerView和其他View不同，並沒有setOnItemClickLitener這個方法，所以我們需要自己來創造一個setOnItemClickLitener方法。
        做法就是對條目中的View設定點選事件在點選事件中調取我們自己定義的介面OnItemClickLitener中的回撥方法onItemClick
        Activity中使用的時候，讓Activity實現我們自定義的OnItemClickLitener介面，對RecyclerView使用我們自己寫的setOnItemClickLitener方法，傳入this就可以了

mAdapter.setOnItemClickLitener(this);

其他相關：

mRecyclerView.scrollToPosition(position);    //滾動到對應索引位置（當該位置已經展示在螢幕中時，並不會出現滾動效果）