RecyclerView实现瀑布流的效果

先上图吧，哈哈：

shot-img.jpg
实现思路：
RecyclerView 中提供的 StaggeredGridLayoutManager 交叉网格的布局管理来实现网格的效果，然后通过随机的控制其中item的高度来设置。

主要代码:

/**
 * Created by Administrator on 2016/5/31 0031.
 *
 * 瀑布流的展示
 *
 * 接口来自抓包的网易客户端接口
 */
public class WaterFallFragment extends BaseFragment{

    @Bind(R.id.recycler_view)
    RecyclerView mRecyclerView;

    private WaterFallAdapter mAdapter;

    @Override
    protected int getLayoutId() {
        return R.layout.fragment_image_main;
    }

    @Override
    protected void initView(View view, Bundle savedInstanceState) {
        ButterKnife.bind(this, view);
    }

    @Override
    protected void initData() {

        mRecyclerView.setLayoutManager(new
                StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL));
        mAdapter = new WaterFallAdapter(mActivity);
        mRecyclerView.setAdapter(mAdapter);

        getJsonData();
    }

    private void getJsonData(){

        //网易的接口(可以浏览器直接访问)
        String url = "http://c.3g.163.com/recommend/getChanListNews?" +
                "channel=T1456112189138&size=20&passport=&devId=1uuFYbybIU2oqSRGyFrjCw%3D%3D" +
                "&lat=%2F%2FOm%2B%2F8ScD%2B9fX1D8bxYWg%3D%3D&lon=LY2l8sFCNzaGzqWEPPgmUw%3D%3D" +
                "&version=9.0&net=wifi&ts=1464769308" +
                "&sign=bOVsnQQ6gJamli6%2BfINh6fC%2Fi9ydsM5XXPKOGRto5G948ErR02zJ6%2FKXOnxX046I" +
                "&encryption=1&canal=meizu_store2014_news" +
                "&mac=sSduRYcChdp%2BBL1a9Xa%2F9TC0ruPUyXM4Jwce4E9oM30%3D";

        //volley
        RequestQueue requestQueue = Volley.newRequestQueue(mActivity);
        StringRequest request = new StringRequest(url, new Response.Listener<String>() {
            @Override
            public void onResponse(String s) {

                try{
                    List<ImageBean> list = new ArrayList<>();
                    JSONObject jsonObject = new JSONObject(s);
                    JSONArray array = jsonObject.optJSONArray("美女");
                    for(int i=0; i < array.length();i++){
                        JSONObject item = array.optJSONObject(i);
                        String imgsrc = item.optString("imgsrc");
                        String title = item.optString("title");
                        ImageBean bean = new ImageBean();
                        bean.setImgsrc(imgsrc);
                        bean.setTitle(title);
                        list.add(bean);
                        Log.d("img","imgsrc="+imgsrc);
                    }

                    mAdapter.getList().addAll(list);
                    mAdapter.getRandomHeight(list);
                    mAdapter.notifyDataSetChanged();


                }catch (Exception e){
                    e.printStackTrace();
                }
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError volleyError) {

            }
        });

        requestQueue.add(request);
    }

}

RecyclerView adapter

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

    private Context mContext;
    private List<ImageBean> mList = new ArrayList<>();
    private List<Integer> mHeights;

    public WaterFallAdapter(Context context){
        this.mContext = context;
    }

    public void getRandomHeight(List<ImageBean> mList){
        mHeights = new ArrayList<>();
        for(int i=0; i < mList.size();i++){
            //随机的获取一个范围为200-600直接的高度
            mHeights.add((int)(300+Math.random()*400));
        }
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

        View view = LayoutInflater.from(mContext)
                .inflate(R.layout.item_image_text, parent, false);
        ViewHolder viewHolder = new ViewHolder(view);

        return viewHolder;
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        ViewGroup.LayoutParams layoutParams = holder.itemView.getLayoutParams();
        layoutParams.height = mHeights.get(position);
        holder.itemView.setLayoutParams(layoutParams);

        ImageBean bean = mList.get(position);
        ImageLoader.getInstance().displayImage(bean.getImgsrc(),
                holder.mImageView, NORMAL_OPTION);
    }

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

    public static class ViewHolder extends RecyclerView.ViewHolder{

        @Bind(R.id.imageview)
        ImageView mImageView;

        public ViewHolder(View view){
            //需要设置super
            super(view);
            ButterKnife.bind(this, view);
        }
    }

    public List<ImageBean> getList() {
        return mList;
    }

    public static DisplayImageOptions NORMAL_OPTION = new DisplayImageOptions.Builder()
                .cacheInMemory(true)
                .showImageOnLoading(R.mipmap.ic_launcher)
                .showImageForEmptyUri(R.mipmap.ic_launcher)
                .showImageOnFail(R.mipmap.ic_launcher)
                .cacheOnDisc(true)
                .build();
}

布局
主要使用：CardView + ImageView来布局的（Cardview实现圆角）
使用CradView，需要在gradle中添加

compile 'com.android.support:cardview-v7:23.0.1'

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_margin="8dp"
    app:cardCornerRadius="4dp"
    >

    <ImageView
        android:id="@+id/imageview"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:scaleType="centerCrop"
        />

    <TextView
        android:id="@+id/text_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:padding="20dp"
        tools:text="this is a simple"
        android:visibility="gone"
        />

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

项目地址github：https://github.com/George-Soros/RecyclerViewTest

有不明白的，有建议的，需要你的留言哦，