效果

紅色方框標出來的是recyclerview的item

實現思路就是在一個recyclerview的adapter中 在初始化一個recyclerview 的adapter

布局文件
activity_main.xml

<ScrollView 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"
    tools:context="com.project.recyclerviewtest.MainActivity">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    <ImageView
        android:id="@+id/image"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:src="@mipmap/ic_launcher"/>

    <android.support.v7.widget.RecyclerView
        android:layout_below="@+id/image"
        android:id="@+id/recyclerView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
    </android.support.v7.widget.RecyclerView>
    </RelativeLayout>
</ScrollView>

MainActivity.java

private RecyclerView recyclerView;

private BusinessAdapter businessAdapter;

private List<Object> mDatas;


private ImageView imageView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    initData();
    recyclerView = (RecyclerView) findViewById(R.id.recyclerView);

    recyclerView.setLayoutManager(new LinearLayoutManager(this));
    businessAdapter = new BusinessAdapter(this, mDatas);
//        businessAdapter.setOnRecyclerViewListener(this);

    recyclerView.setAdapter(businessAdapter);
    imageView = (ImageView) findViewById(R.id.image);
    imageView.setOnClickListener(this);
    businessAdapter.setOnRecyclerViewListener(new BusinessAdapter.OnRecyclerViewListener() {
        @Override
        public void onBusinessImgClick(View view, int position) {

        }

        @Override
        public void onBusinessNameClick(View view, int position) {

        }
    });
}

// 數據
protected void initData() {
    mDatas = new ArrayList<>();
    List<ProductEntity> products = new ArrayList<>();
    for (int i = 1; i < 10; i++) {
        ProductEntity productEntity = new ProductEntity();
        productEntity.setProductName("我是一個商品哈哈哈哈或或或" + i);
        productEntity.setProductImage("https://ss0.baidu.com/7Po3dSag_xI4khGko9WTAnF6hhy/image/h%3D200/sign=71cd4229be014a909e3e41bd99763971/472309f7905298221dd4c458d0ca7bcb0b46d442.jpg");
        productEntity.setProductPrice("99." + i);
        products.add(productEntity);
    }
    for (int i = 1; i < 30; i++) {
        BusinessEntity entity = new BusinessEntity();
        entity.setBusinessName("ddddfsdfdsfsdfsdfzzzz" + i);
        entity.setBusinessImage("https://ss2.bdstatic.com/70cFvnSh_Q1YnxGkpoWK1HF6hhy/it/u=1564533037,3918553373&fm=116&gp=0.jpg");
        entity.setProducts(products);
        mDatas.add(entity);
    }
}

MainActivity 就是初始化數據和第一個recyclerview

BusinessAdapter.java

public class BusinessAdapter extends RecyclerView.Adapter<BusinessAdapter.MyViewHolder> {

    public interface OnRecyclerViewListener {

        // 點擊商家圖片
        void onBusinessImgClick(View view, int position);

        // 點擊商家名稱
        void onBusinessNameClick(View view, int position);
    }

    private OnRecyclerViewListener listener;

    private Context mContext;

    private List<Object> mData;

    public void setOnRecyclerViewListener(OnRecyclerViewListener mItemListener) {
        this.listener = mItemListener;

    }

    public BusinessAdapter(Context context, List<Object> datas) {
        this.mContext = context;
        this.mData = datas;
    }

    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(mContext).inflate(R.layout.item_business, parent, false);
        MyViewHolder myViewHolder = new MyViewHolder(view);
        return myViewHolder;
    }

    @Override
    public void onBindViewHolder(final MyViewHolder holder, final int position) {
        final BusinessEntity entity = (BusinessEntity) mData.get(position);
        holder.businessName.setText(entity.getBusinessName());
        Glide
                .with(mContext)
                .load(entity.getBusinessImage())
                .centerCrop()
                .placeholder(R.mipmap.ic_launcher)
                .crossFade()
                .into(holder.businessImg);


        // 關鍵代碼
        //////////////////////////////////////////////////
        ProductAdapter productAdapter = new ProductAdapter(mContext, entity.getProducts());

        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(mContext);
        linearLayoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);
        holder.productList.setLayoutManager(linearLayoutManager);
        holder.productList.setAdapter(productAdapter);
        holder.productList.setVisibility(View.VISIBLE);
        /////////////////////////////////////////////////////

        // 是否點擊收藏
        if (entity.isCollection()) {
            holder.collectionImg.setImageResource(R.mipmap.collection_true);
        } else {
            holder.collectionImg.setImageResource(R.mipmap.collection_false);
        }

        holder.isCollection.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (entity.isCollection()) {
                    ((BusinessEntity) mData.get(position)).setCollection(false);
                    holder.collectionImg.setImageResource(R.mipmap.collection_false);
                } else {
                    ((BusinessEntity) mData.get(position)).setCollection(true);
                    holder.collectionImg.setImageResource(R.mipmap.collection_true);
                }
            }
        });

        if (listener != null) {
            // 商家圖片點擊事件
            holder.businessImg.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    listener.onBusinessImgClick(view, position);
                }
            });
            // 商家名稱點擊事件
            holder.businessName.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    listener.onBusinessNameClick(view, position);
                }
            });
        }
    }

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

    class MyViewHolder extends RecyclerView.ViewHolder {

        ImageView businessImg;
        TextView businessName;
        LinearLayout isCollection;
        ImageView collectionImg;
        RecyclerView productList;

        public MyViewHolder(View itemView) {
            super(itemView);
            businessImg = (ImageView) itemView.findViewById(R.id.businessImg_Iv);
            businessName = (TextView) itemView.findViewById(R.id.productName_Tv);
            isCollection = (LinearLayout) itemView.findViewById(R.id.isCollection_Ll);
            collectionImg = (ImageView) itemView.findViewById(R.id.collection_Iv);
            productList = (RecyclerView) itemView.findViewById(R.id.productRv);
        }
    }

}

BusinessAdapter 的item布局

item_business.xml

布局長這樣

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:paddingBottom="10dp">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:padding="10dp">
    <LinearLayout
        android:layout_margin="5dp"
        android:padding="5dp"
        android:background="@drawable/border"
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="60dp">
        <ImageView
            android:id="@+id/businessImg_Iv"
            android:layout_width="50dp"
            android:layout_height="50dp"
            android:src="@mipmap/ic_launcher"/>
        <TextView
            android:id="@+id/productName_Tv"
            android:paddingLeft="5dp"
            android:layout_gravity="center_vertical"
            android:layout_weight="1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Burberry"/>

        <LinearLayout
            android:id="@+id/isCollection_Ll"
            android:layout_gravity="center_vertical"
            android:orientation="vertical"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">
            <ImageView
                android:id="@+id/collection_Iv"
                android:layout_gravity="center"
                android:layout_width="20dp"
                android:layout_height="20dp"
                android:src="@mipmap/ic_launcher"/>
            <TextView
                android:layout_gravity="center"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="收藏"/>
        </LinearLayout>
    </LinearLayout>
        <android.support.v7.widget.RecyclerView
            android:id="@+id/productRv"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="5dp" />

    </LinearLayout>

</RelativeLayout>

ProductAdapter.java

public class ProductAdapter extends RecyclerView.Adapter<ProductAdapter.MyViewHolder> {

    DisplayMetrics dm;

    private Context mContext;

    private List<ProductEntity> mDatas;

    public ProductAdapter(Context context, List<ProductEntity> data) {
        this.mContext = context;
        this.mDatas = data;

        dm = new DisplayMetrics();
        ((Activity) context).getWindowManager().getDefaultDisplay().getMetrics(dm);
    }


    @Override
    public ProductAdapter.MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(mContext).inflate(R.layout.item_product, parent, false);
        MyViewHolder myViewHolderw = new MyViewHolder(view);
        //動態設置ImageView的寬高，根據自己每行item數量計算
        //dm.widthPixels-dip2px(20)即屏幕寬度-左右10dp+10dp=20dp再轉換為px的寬度，最后/3得到每個item的寬高
        RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams((dm.widthPixels - dip2px(20)) / 3, ViewGroup.LayoutParams.WRAP_CONTENT);
        view.setLayoutParams(lp);
        return myViewHolderw;
    }

    @Override
    public void onBindViewHolder(ProductAdapter.MyViewHolder holder, int position) {
        ProductEntity entity = mDatas.get(position);
        holder.productName.setText(entity.getProductName());
        holder.productPrice.setText(entity.getProductPrice());
        Glide
                .with(mContext)
                .load(entity.getProductImage())
                .centerCrop()
                .placeholder(R.mipmap.ic_launcher)
                .crossFade()
                .into(holder.productImg);
//        holder.productImg.setImageResource(R.mipmap.ic_launcher);
    }


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

    class MyViewHolder extends RecyclerView.ViewHolder {

        ImageView productImg;
        TextView productName;
        TextView productPrice;

        public MyViewHolder(View itemView) {
            super(itemView);
            productImg = (ImageView) itemView.findViewById(R.id.productImg_Iv);
            productName = (TextView) itemView.findViewById(R.id.productName_Tv);
            productPrice = (TextView) itemView.findViewById(R.id.productPrice_Tv);
        }
    }


    int dip2px(float dpValue) {
        final float scale = mContext.getResources().getDisplayMetrics().density;
        return (int) (dpValue * scale + 0.5f);
    }
}

item_product.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">

    <ImageView
        android:id="@+id/productImg_Iv"
        android:layout_gravity="center"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:src="@mipmap/ic_launcher"/>
    <TextView
        android:id="@+id/productName_Tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="￥"/>
        <TextView
            android:id="@+id/productPrice_Tv"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="99.00"/>
    </LinearLayout>

</LinearLayout>