Android开发 购物车二级列表（仿淘宝）功能没有完善

二级列表 用的是两个适配器，一个商家，一个商品；

效果图： 

model

public class ClaModel implements IConstant.IModel {
    @Override
    public void clalist(HashMap params, final ModelCallBack callBack) {
        OkHttpUtils.getmInstance().doGet(Api.Shop_Api, new OkHttpCallBack() {
            @Override
            public void success(String result) {
                callBack.success(result);
            }

            @Override
            public void error(String msg) {
                callBack.error(msg);
            }
        });
    }

    public interface ModelCallBack{
        void success(String result);
        void error(String msg);
    }
}

constant

public interface IConstant {
    abstract class IPresenter{
        public abstract void clalist(HashMapparams);
    }
    interface IModel{
        void clalist(HashMap params, ClaModel.ModelCallBack callBack);
    }
    interface IView{
        void success(String result);
        void error(String msg);
    }
}

presenter

public class ClaPresenter extends IConstant.IPresenter {

    IConstant.IView iView;
    ClaModel claModel;

    public ClaPresenter(IConstant.IView iView) {
        this.iView = iView;
        claModel = new ClaModel();
    }

    @Override
    public void clalist(HashMap params) {
        claModel.clalist(params, new ClaModel.ModelCallBack() {
            @Override
            public void success(String result) {
                iView.success(result);
            }

            @Override
            public void error(String msg) {
                iView.error(msg);
            }
        });
    }
}

OKhttp

public interface OkHttpCallBack {
    void success(String result);
    void error(String msg);
}

public class OkHttpUtils {
    private static OkHttpUtils mInstance;
    private OkHttpClient okHttpClient;
    private Handler handler = new Handler();

    public static OkHttpUtils getmInstance(){
        if (mInstance == null){
            synchronized (OkHttpUtils.class){
                if (mInstance == null){
                    mInstance = new OkHttpUtils();
                }
            }
        }
        return mInstance;
    }

    public OkHttpUtils(){
        HttpLoggingInterceptor loggingInterceptor = new HttpLoggingInterceptor();
        loggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
        okHttpClient = new OkHttpClient.Builder()
                .addInterceptor(loggingInterceptor)
                .connectTimeout(5,TimeUnit.SECONDS)
                .readTimeout(5,TimeUnit.SECONDS)
                .writeTimeout(5,TimeUnit.SECONDS)
                .build();
    }

    public void doGet(String url,final OkHttpCallBack callBack){
        Request request = new Request.Builder().url(url).get().build();
        okHttpClient.newCall(request).enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                handler.post(new Runnable() {
                    @Override
                    public void run() {
                        callBack.error("网络失败");
                    }
                });
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                if (response.code()==200){
                    final String string = response.body().string();
                    handler.post(new Runnable() {
                        @Override
                        public void run() {
                            callBack.success(string);
                        }
                    });
                }
            }
        });
    }
}

商家适配器

public class MyAdapter extends RecyclerView.Adapter {

    Context context;
    Listlist;
    private GoodsAdapter adapter;

    public MyAdapter(Context context) {
        this.context = context;
        list = new ArrayList<>();
    }

    public void setList(List list) {
        this.list = list;
        notifyDataSetChanged();
    }

    @NonNull
    @Override
    public MyAdapter.Myvh onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(context).inflate(R.layout.layout, parent, false);
        return new Myvh(view);
    }

    @Override
    public void onBindViewHolder(@NonNull MyAdapter.Myvh holder, int position) {
        holder.text_id.setText(list.get(position).getName());
        //得到子类的数据
        List spus = list.get(position).getSpus();
        //设置方向
        holder.rev_id.setLayoutManager(new LinearLayoutManager(context));
        //设置适配器
        adapter = new GoodsAdapter(context,spus);
        holder.rev_id.setAdapter(adapter);

    }

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

    public class Myvh extends RecyclerView.ViewHolder {

        private final TextView text_id;
        private final RecyclerView rev_id;

        public Myvh(View itemView) {
            super(itemView);
            text_id = itemView.findViewById(R.id.text_id);
            rev_id = itemView.findViewById(R.id.rev_id);


        }
    }

}

商品适配器

public class GoodsAdapter extends RecyclerView.Adapter{

    private Context context;
    private List goodslist;

    public GoodsAdapter(Context context, List goodslist) {
        this.context = context;
        this.goodslist = goodslist;
    }

    @NonNull
    @Override
    public GoodsAdapter.Myvh onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(context).inflate(R.layout.layout2, parent, false);
        return new Myvh(view);
    }

    @Override
    public void onBindViewHolder(@NonNull GoodsAdapter.Myvh holder, int position) {
        Glide.with(context).load(goodslist.get(position).getPic_url()).into(holder.image_id);
        holder.text_id.setText(goodslist.get(position).getName());
        holder.price_id.setText("￥"+goodslist.get(position).getPraise_num()+"");
    }

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

    public class Myvh extends RecyclerView.ViewHolder {

        private final ImageView image_id;
        private final TextView text_id;
        private final TextView price_id;

        public Myvh(View itemView) {
            super(itemView);
            image_id = itemView.findViewById(R.id.image_id);
            text_id = itemView.findViewById(R.id.text_id);
            price_id = itemView.findViewById(R.id.price_id);

        }
    }
}

 MainActivity主页面

public class MainActivity extends AppCompatActivity implements IConstant.IView {

    private XRecyclerView xrev_id;
    private MyAdapter myAdapter;
    private ClaPresenter claPresenter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //得到控件
        xrev_id = findViewById(R.id.xrev_id);
        claPresenter = new ClaPresenter(this);
        claPresenter.clalist(new HashMap());
        xrev_id.setLayoutManager(new LinearLayoutManager(this));
        myAdapter = new MyAdapter(this);


    }

    @Override
    public void success(String result) {
        Bean bean = new Gson().fromJson(result, Bean.class);
        myAdapter.setList(bean.getData());
        xrev_id.setAdapter(myAdapter);
    }

    @Override
    public void error(String msg) {

    }
}