fresco+recyclerView展示+MVP

public class Contant {
    public static final String BAUS_URI = "http://www.zhaoapi.cn/";
}

public interface Api {
    @GET("home/getHome")
    Call tohome();

    @GET("product/getProductDetail")
    Call Show(@Query("pid") String pid);
}

public final Api api;

public HttpUtils() {
    OkHttpClient httpClient = new OkHttpClient.Builder()
            .build();
    Retrofit retrofit = new Retrofit.Builder()
            .baseUrl(Contant.BAUS_URI)
            .addConverterFactory(GsonConverterFactory.create())
            .client(httpClient)
            .build();
    api = retrofit.create(Api.class);
}
private static class GETHttpUtilsinfo{
    private static HttpUtils httpUtils = new HttpUtils();
}
public static HttpUtils getHttpUtilsimg() {
    return GETHttpUtilsinfo.httpUtils;
}

public class MainModel  {

    public void MainModel(final Main main) {
        Call call = HttpUtils.getHttpUtilsimg().api.tohome();
        call.enqueue(new Callback() {
            @Override
            public void onResponse(Call call, Response response) {
                List list = response.body().getData().getTuijian().getList();
                main.success(list);
            }

            @Override
            public void onFailure(Call call, Throwable t) {

            }
        });
    }
    public interface Main{
        void success(List list);
    }
}

public class BasePresenter < V extends IBaseView> {
    private V v;
    public void attacthView(V v){
        this.v = v;
    }
    public void getDataView(){
        this.v = null;
    }
    public V getView(){
        return v;
    }
}

public class MainPresenter extends BasePresenter {

    private final MainModel model;

    public MainPresenter() {
        model = new MainModel();
    }
    public void getdata(){
        model.MainModel(new MainModel.Main() {
            @Override
            public void success(List list) {
                getView().onSuccess(list);
            }
        });
    }
}

public class MainActivity extends AppCompatActivity implements IMainView {

    @BindView(R.id.recycler_view)
    RecyclerView recyclerView;
    private MainPresenter mainPresenter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);
        mainPresenter = new MainPresenter();
        mainPresenter.attacthView(this);
        mainPresenter.getdata();
    }

    @Override
    public void onSuccess(final List list) {
        StaggeredGridLayoutManager manager = new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL);
        recyclerView.setLayoutManager(manager);
        SpacesItemDecoration decoration = new SpacesItemDecoration(50);
        recyclerView.addItemDecoration(decoration);
        MyAdapter adapter = new MyAdapter(MainActivity.this, list);
        recyclerView.setAdapter(adapter);
    }

    @Override
    public void onError() {

    }
}

public class MyAdapter extends RecyclerView.Adapter {
    private Context context;
    private List list;

    public MyAdapter(Context context, List list) {
        this.context = context;
        this.list = list;
    }

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

    @Override
    public void onBindViewHolder(@NonNull MyAdapter.holder holder, final int position) {
        Uri uri = Uri.parse(list.get(position).getImages().split("\\|")[0]);
        holder.sim.setImageURI(uri);
        holder.text.setText(list.get(position).getPrice()+"元");
        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int pid = list.get(position).getPid();
                Intent intent = new Intent(context,ShowActivity.class);
                intent.putExtra("pid",String.valueOf(pid));
                context.startActivity(intent);
            }
        });
    }

    @Override
    public int getItemCount() {
        return list.size();
    }
    class holder extends RecyclerView.ViewHolder {

        private final SimpleDraweeView sim;
        private final TextView text;

        public holder(View itemView) {
            super(itemView);
            sim = itemView.findViewById(R.id.sim_view);
            text = itemView.findViewById(R.id.text_view);
        }
    }
    private OnItemClickListener onItemClickListener;

    public interface OnItemClickListener{
        void onItemClick(int position);
    }
    public void setOnItemClickListener(OnItemClickListener onItemClickListener){
        this.onItemClickListener = onItemClickListener;
    }
}

public class ShowModel {
    public void ShowModel(String pid,final Show show) {
        Call call = HttpUtils.getHttpUtilsimg().api.Show(pid);
        call.enqueue(new Callback() {
            @Override
            public void onResponse(Call call, Response response) {
                ShowBean.DataBean data = response.body().getData();
                show.onsuccess(data);
            }

            @Override
            public void onFailure(Call call, Throwable t) {

            }
        });
    }
    public interface Show{
        void onsuccess(ShowBean.DataBean data);
    }
}

public class Showpresenter extends BasePresenter {

    private final ShowModel model;

    public Showpresenter() {
        model = new ShowModel();
    }
    public void getda(String pid){
        model.ShowModel(pid, new ShowModel.Show() {
            @Override
            public void onsuccess(ShowBean.DataBean data) {
                getView().onSuccess(data);
            }
        });
    }
}

public class ShowActivity extends Activity implements ShowView {

    @BindView(R.id.sim_view)
    SimpleDraweeView simView;
    @BindView(R.id.text_view)
    TextView textView;
    @BindView(R.id.text_name)
    TextView textName;
    private Showpresenter showpresenter;
    private String pid;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_show);
        ButterKnife.bind(this);
        pid = getIntent().getStringExtra("pid");
        showpresenter = new Showpresenter();
        showpresenter.attacthView(this);
        showpresenter.getda(this.pid);
    }

    @Override
    public void onSuccess(ShowBean.DataBean data) {
        Uri uri = Uri.parse(data.getImages().split("\\|")[0]);
        simView.setImageURI(uri);
        textName.setText(data.getTitle());
        textView.setText(data.getPrice() + "￥");
    }

    @Override
    public void onerror() {

    }
}