MVP左右联动

属性动画XML

<?xml version="1.0" encoding="utf-8"?>

<android.support.constraint.ConstraintLayout xmlns:android=“http://schemas.android.com/apk/res/android”
xmlns:app=“http://schemas.android.com/apk/res-auto”
xmlns:tools=“http://schemas.android.com/tools”
android:layout_width=“match_parent”
android:layout_height=“match_parent”
tools:context=".activity.MainActivity">

<ImageView
    android:layout_width="100dp"
    android:layout_height="100dp"
    android:id="@+id/img"
    android:src="@mipmap/ic_launcher_round"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"/>

</android.support.constraint.ConstraintLayout>
属性动画activity
package com.example.zhoermoni.activity;

import android.animation.Animator;
import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.DisplayMetrics;
import android.widget.ImageView;

import com.example.zhoermoni.R;

public class MainActivity extends AppCompatActivity {

private ImageView img;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    initView();
    initData();
}

private void initData() {
    getSupportActionBar().hide();
    DisplayMetrics displayMetrics = getResources().getDisplayMetrics();
    int height = displayMetrics.heightPixels;
    ObjectAnimator objectAnimator1 = ObjectAnimator.ofFloat(img, "scaleX", 2, 1);
    ObjectAnimator objectAnimator2 = ObjectAnimator.ofFloat(img, "alpha", 0, 1);
    ObjectAnimator objectAnimator3 = ObjectAnimator.ofFloat(img, "rotation", 0, 360);
    ObjectAnimator objectAnimator4 = ObjectAnimator.ofFloat(img, "translationY", 0, height / 2);
    AnimatorSet animatorSet = new AnimatorSet();
    animatorSet.play(objectAnimator1).with(objectAnimator2).with(objectAnimator3).with(objectAnimator4);
    animatorSet.setDuration(3000);
    animatorSet.start();
    animatorSet.addListener(new Animator.AnimatorListener() {
        @Override
        public void onAnimationStart(Animator animation) {

        }

        @Override
        public void onAnimationEnd(Animator animation) {
            startActivity(new Intent(MainActivity.this,ShowActivity.class));
        }

        @Override
        public void onAnimationCancel(Animator animation) {

        }

        @Override
        public void onAnimationRepeat(Animator animation) {

        }
    });
}

private void initView() {
    img = (ImageView) findViewById(R.id.img);
}

}
主页面
package com.example.zhoermoni.activity;

import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.BottomNavigationView;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.view.MenuItem;
import android.widget.TextView;

import com.example.zhoermoni.R;
import com.example.zhoermoni.fragment.FragmentOne;
import com.example.zhoermoni.fragment.FragmentTwo;

public class ShowActivity extends AppCompatActivity {

private TextView mTextMessage;

private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
        = new BottomNavigationView.OnNavigationItemSelectedListener() {

    @Override
    public boolean onNavigationItemSelected(@NonNull MenuItem item) {
        switch (item.getItemId()) {
            case R.id.navigation_home:
                pager.setCurrentItem(0);
                return true;
            case R.id.navigation_dashboard:
                pager.setCurrentItem(1);
                return true;
            case R.id.navigation_notifications:
                pager.setCurrentItem(2);
                return true;
        }
        return false;
    }
};
private ViewPager pager;
private BottomNavigationView navigation;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_show);
    initView();
    pager.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager()) {
        @Override
        public Fragment getItem(int i) {
            switch (i){
                case 0:
                    return new FragmentOne();
                case 1:
                    return new FragmentTwo();
                case 2:
                    return new FragmentOne();
            }
            return null;
        }

        @Override
        public int getCount() {
            return 3;
        }
    });

    mTextMessage = (TextView) findViewById(R.id.message);
    final BottomNavigationView navigation = (BottomNavigationView) findViewById(R.id.navigation);
    navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
    pager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
        @Override
        public void onPageScrolled(int i, float v, int i1) {

        }

        @Override
        public void onPageSelected(int i) {
            switch (i){
                case 0:
                    navigation.setSelectedItemId(R.id.navigation_home);
                    break;
                case 1:
                    navigation.setSelectedItemId(R.id.navigation_dashboard);
                    break;
                case 2:
                    navigation.setSelectedItemId(R.id.navigation_notifications);
                    break;
            }
        }

        @Override
        public void onPageScrollStateChanged(int i) {

        }
    });
}

private void initView() {
    pager = (ViewPager) findViewById(R.id.pager);
    navigation = (BottomNavigationView) findViewById(R.id.navigation);
}

}
主页面xml

<?xml version="1.0" encoding="utf-8"?>

<android.support.v4.view.ViewPager
    android:id="@+id/pager"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_weight="9"
     />

<android.support.design.widget.BottomNavigationView
    android:id="@+id/navigation"
    android:layout_width="wrap_content"
    android:layout_weight="1"
    android:layout_height="wrap_content"
    android:layout_marginStart="0dp"
    android:layout_marginEnd="0dp"
    android:background="?android:attr/windowBackground"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:menu="@menu/navigation" />

BaseFragment package com.example.zhoermoni.fragment;

import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public abstract class BaseFragment extends Fragment {
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return inflater.inflate(getLayoutId(),container,false);
}

@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    initView(view);
}

protected abstract int getLayoutId();

protected abstract void initView(View view);

protected abstract void initData();

}
fragmentone
package com.example.zhoermoni.fragment;

import android.view.View;

import com.example.zhoermoni.R;

public class FragmentOne extends BaseFragment{
@Override
protected int getLayoutId() {
return R.layout.fragmentone;
}

@Override
protected void initView(View view) {

}

@Override
protected void initData() {

}

}
fragmenttwo
package com.example.lenovo.myapplication.fragment;

import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;

import com.example.lenovo.myapplication.R;
import com.example.lenovo.myapplication.adapter.LeftAdapter;
import com.example.lenovo.myapplication.adapter.RightAdapter;
import com.example.lenovo.myapplication.contract.IProductContract;
import com.example.lenovo.myapplication.entity.Product;
import com.example.lenovo.myapplication.entity.ProductCls;
import com.example.lenovo.myapplication.presenter.ProductPresenter;
import com.example.lenovo.myapplication.utils.OkhttpUtils;
import com.example.lenovo.myapplication.view.TopView;

import java.util.HashMap;
import java.util.List;

public class ClsFragment extends BaseFragment implements IProductContract.IProductView {
private RecyclerView left_rec;
private RecyclerView right_rec;
private LeftAdapter myAdapter;
private String cid=“1”;
private RightAdapter rightAdapter;
private ProductPresenter presenter;
private TopView topView;

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

@Override
protected void initView(View view) {
    left_rec = view.findViewById(R.id.left_rec);
    right_rec = view.findViewById(R.id.right_rec);
    presenter = new ProductPresenter(this);
    presenter.leftproduct();
    HashMap<String,String> params=new HashMap<>();
    params.put("cid",cid);
    presenter.rightProduct(params);
    left_rec.setLayoutManager(new LinearLayoutManager(getActivity()));
    right_rec.setLayoutManager(new LinearLayoutManager(getActivity()));
}

@Override
protected void initData() {

}

@Override
public void onFailUre(String msg) {

}

@Override
public void onSuccessLeft(Product product) {
    List<Product.DataBean> data = product.getData();
    LeftAdapter leftAdapter = new LeftAdapter(getActivity(),data);
    //leftAdapter.setItemClickListener(this);
    left_rec.setAdapter(leftAdapter);
    leftAdapter.setItemClickListener(new LeftAdapter.ItemClickListener() {
        @Override
        public void click(String cid) {
            HashMap<String,String> params=new HashMap<>();
            params.put("cid",cid);
            presenter.rightProduct(params);
        }
    });
}

@Override
public void onSuccessRight(ProductCls productCls) {
    List<ProductCls.DataBean> data = productCls.getData();
    RightAdapter rightAdapter = new RightAdapter(getActivity(), data);
    right_rec.setAdapter(rightAdapter);
}

@Override
public void onSuccessMsg(String msg) {

}

@Override
public void onDestroy() {
    super.onDestroy();
    OkhttpUtils.getmInstance().okhttpCall();
    presenter.destroy();
}
/*@Override
public void click(String cid) {

    getLeft();

}*/

}
册边

<?xml version="1.0" encoding="utf-8"?>

<android.support.constraint.ConstraintLayout xmlns:android=“http://schemas.android.com/apk/res/android”
android:layout_width=“match_parent”
android:layout_height=“match_parent”
xmlns:app=“http://schemas.android.com/apk/res-auto”>

<TextView
    android:id="@+id/title"
    android:layout_width="0dp"
    android:layout_height="70dp"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    android:text="asdasdas"
    android:gravity="center"
    android:textSize="30dp"

    />
<View
    android:layout_width="match_parent"
    android:layout_height="2dp"
    android:background="#000"
    />

</android.support.constraint.ConstraintLayout>
自定义viewxml

<?xml version="1.0" encoding="utf-8"?>

自定义viewactivity
package com.example.zhoermoni.view;

import android.content.Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.example.zhoermoni.R;

public class TopView extends LinearLayout {
public TopView(Context context) {
this(context,null);
}

public TopView(Context context,  AttributeSet attrs) {
    this(context, attrs,0);
}

public TopView(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    init(context);
}

private void init(Context context) {
    View view=LayoutInflater.from(context).inflate(R.layout.zhidingy,this);
    ImageView img=view.findViewById(R.id.img);
    TextView title=view.findViewById(R.id.title);
    ImageView qiehuan=view.findViewById(R.id.qiehuan);
}

}
契约类
package com.example.zhoermoni.contract;

import com.example.zhoermoni.entily.Product;
import com.example.zhoermoni.entily.User;
import com.example.zhoermoni.net.RequestCallback;

import java.util.HashMap;

public interface IShowCallback {
public abstract class IShowPresenter{
public abstract void user();
public abstract void product(HashMap<String,String>params);
}
interface IShowModel{
void user(RequestCallback callback);
void product(HashMap<String,String>params,RequestCallback callback);
}
interface IShowView{
void onFailUre(String msg);
void onSuccessUser(User user);
void onSuccessProduct(Product product);
void onSuccessMsg(String msg);
}
}
OkHTTPCallback…
package com.example.zhoermoni.net;

public interface OkhttpCallback {
void onFailUre(String msg);
void onSuccess(String result);
}
RequesCallbask…
package com.example.zhoermoni.net;

import com.example.zhoermoni.entily.Product;
import com.example.zhoermoni.entily.User;

public interface RequestCallback {
void onFailUre(String msg);
void onSuccessUser(User user);
void onSuccessProduct(Product product);
void onSuccessMsg(String msg);
}
封装OKHTTP
package com.example.zhoermoni.utiles;

import android.os.Handler;

import com.example.zhoermoni.net.OkhttpCallback;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.FormBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import okhttp3.logging.HttpLoggingInterceptor;

public class OkHttpUtiley {
private Handler handler=new Handler();
private OkHttpClient okHttpClient;
private static OkHttpUtiley mInstance;
public OkHttpUtiley(){
HttpLoggingInterceptor loggingInterceptor = new HttpLoggingInterceptor();
okHttpClient=new OkHttpClient.Builder()
.addInterceptor(loggingInterceptor)
.readTimeout(5,TimeUnit.SECONDS)
.connectTimeout(5,TimeUnit.SECONDS)
.writeTimeout(5,TimeUnit.SECONDS)
.build();
}
public void doPost(String apiUre, HashMap<String,String>params, final OkhttpCallback okhttpCallback){
FormBody.Builder formBody = new FormBody.Builder();
if (params!=null){
for (Map.Entry<String,String>p:params.entrySet()){
formBody.add(p.getKey(),p.getValue());
}
}
final Request request = new Request.Builder().url(apiUre).post(formBody.build()).build();
okHttpClient.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
if (okhttpCallback!=null){
handler.post(new Runnable() {
@Override
public void run() {
okhttpCallback.onFailUre(“网络异常”);
}
});
}
}

        @Override
        public void onResponse(Call call, Response response) throws IOException {
            final String result = response.body().string();
            int code = response.code();
            if (okhttpCallback!=null){
                if (200==code){
                    handler.post(new Runnable() {
                        @Override
                        public void run() {
                            okhttpCallback.onSuccess(result);
                        }
                    });
                }
            }
        }
    });
}
public static OkHttpUtiley getmInstance(){
    if (mInstance==null){
        synchronized (OkHttpUtiley.class){
            if (mInstance==null){
                mInstance=new OkHttpUtiley();
            }
        }
    }
    return mInstance;
}
public void okhttpCall(){
    if (okHttpClient!=null){
        okHttpClient.dispatcher().cancelAll();
    }
}

}
model类
package com.example.zhoermoni.model;

import android.os.Handler;
import android.text.TextUtils;

import com.example.zhoermoni.api.UserApi;
import com.example.zhoermoni.contract.IShowCallback;
import com.example.zhoermoni.entily.Product;
import com.example.zhoermoni.entily.User;
import com.example.zhoermoni.net.OkhttpCallback;
import com.example.zhoermoni.net.RequestCallback;
import com.example.zhoermoni.utiles.OkHttpUtiley;
import com.google.gson.Gson;

import java.util.HashMap;

public class UserModel implements IShowCallback.IShowModel {
private Handler handler=new Handler();
@Override
public void user(final RequestCallback callback) {
OkHttpUtiley.getmInstance().doPost(UserApi.PRODUCT_LEFT, null, new OkhttpCallback() {
@Override
public void onFailUre(String msg) {
if (callback!=null){
handler.post(new Runnable() {
@Override
public void run() {
callback.onFailUre(“网络有误，请稍后再试”);
}
});
}
}

        @Override
        public void onSuccess(String result) {
            final User user = new Gson().fromJson(result, User.class);
            if (!TextUtils.isEmpty(result)){
                if (callback!=null){
                    handler.post(new Runnable() {
                        @Override
                        public void run() {
                            callback.onSuccessUser(user);
                        }
                    });
                }
            }
        }
    });
}

@Override
public void product(HashMap<String, String> params, final RequestCallback callback) {
    OkHttpUtiley.getmInstance().doPost(UserApi.PRODUCE_RIGHT, params, new OkhttpCallback() {
        @Override
        public void onFailUre(String msg) {
            if (callback!=null){
                handler.post(new Runnable() {
                    @Override
                    public void run() {
                        callback.onFailUre("网络异常");
                    }
                });
            }
        }

        @Override
        public void onSuccess(String result) {
            final Product product = new Gson().fromJson(result, Product.class);
            if (!TextUtils.isEmpty(result)){
                if (callback!=null){
                    handler.post(new Runnable() {
                        @Override
                        public void run() {
                            callback.onSuccessProduct(product);
                        }
                    });
                }
            }
        }
    });
}

}
presenter类
package com.example.zhoermoni.presenter;

import com.example.zhoermoni.contract.IShowCallback;
import com.example.zhoermoni.entily.Product;
import com.example.zhoermoni.entily.User;
import com.example.zhoermoni.model.UserModel;
import com.example.zhoermoni.net.RequestCallback;

import java.util.HashMap;

public class UserPresenter extends IShowCallback.IShowPresenter {
private UserModel userModel;
private IShowCallback.IShowView iShowView;

public UserPresenter( IShowCallback.IShowView iShowView) {
    this.userModel = new UserModel();
    this.iShowView = iShowView;
}

@Override
public void user() {
    if (userModel!=null){
        userModel.user(new RequestCallback() {
            @Override
            public void onFailUre(String msg) {
                if (iShowView!=null){
                    iShowView.onFailUre(msg);
                }
            }

            @Override
            public void onSuccessUser(User user) {
                if (iShowView!=null){
                    iShowView.onSuccessUser(user);
                }
            }

            @Override
            public void onSuccessProduct(Product product) {
                if (iShowView!=null){
                    iShowView.onSuccessProduct(product);
                }
            }

            @Override
            public void onSuccessMsg(String msg) {
                if (iShowView!=null){
                    iShowView.onSuccessMsg(msg);
                }
            }
        });
    }
}

@Override
public void product(HashMap<String, String> params) {
    if (userModel!=null){
        userModel.product(params, new RequestCallback() {
            @Override
            public void onFailUre(String msg) {
                if (iShowView!=null){
                    iShowView.onFailUre(msg);
                }
            }

            @Override
            public void onSuccessUser(User user) {
                if (iShowView!=null){
                    iShowView.onSuccessUser(user);
                }
            }

            @Override
            public void onSuccessProduct(Product product) {
                if (iShowView!=null){
                    iShowView.onSuccessProduct(product);
                }
            }

            @Override
            public void onSuccessMsg(String msg) {
                if (iShowView!=null){
                    iShowView.onSuccessMsg(msg);
                }
            }
        });
    }
}
public void destory(){
    if (iShowView!=null){
        iShowView=null;
    }
}

}
接口
package com.example.zhoermoni.api;

public class UserApi {
public static final String PRODUCT_LEFT=“http://www.zhaoapi.cn/product/getCatagory”;
public static final String PRODUCE_RIGHT=“http://www.zhaoapi.cn/product/getProductCatagory”;
}
类的json解析
package com.example.zhoermoni.entily;

import java.util.List;

public class User {
private String msg;
private String code;
private List data;

public String getMsg() {
    return msg;
}

public void setMsg(String msg) {
    this.msg = msg;
}

public String getCode() {
    return code;
}

public void setCode(String code) {
    this.code = code;
}

public List<DataBean> getData() {
    return data;
}

public void setData(List<DataBean> data) {
    this.data = data;
}

public static class DataBean {

    private int cid;
    private String name;

    public int getCid() {
        return cid;
    }

    public void setCid(int cid) {
        this.cid = cid;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

}
解析
package com.example.zhoermoni.entily;

import java.util.List;

public class Product {
private String msg;
private String code;
private List data;

public String getMsg() {
    return msg;
}

public void setMsg(String msg) {
    this.msg = msg;
}

public String getCode() {
    return code;
}

public void setCode(String code) {
    this.code = code;
}

public List<DataBean> getData() {
    return data;
}

public void setData(List<DataBean> data) {
    this.data = data;
}

public class DataBean {
    private String name;
    private String pcid;
    private List<ListBean> list;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPcid() {
        return pcid;
    }

    public void setPcid(String pcid) {
        this.pcid = pcid;
    }

    public List<ListBean> getList() {
        return list;
    }

    public void setList(List<ListBean> list) {
        this.list = list;
    }

    public class ListBean {

        private String icon;
        private String name;

        public String getIcon() {
            return icon;
        }

        public void setIcon(String icon) {
            this.icon = icon;
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }
    }
}

}
侧面的adapter
package com.example.lenovo.myapplication.adapter;

import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import com.example.lenovo.myapplication.R;
import com.example.lenovo.myapplication.entity.Product;

import java.util.ArrayList;
import java.util.List;

public class LeftAdapter extends RecyclerView.Adapter<LeftAdapter.ViewHolder> {
private Context context;
private List<Product.DataBean> list;

public LeftAdapter(Context context, List<Product.DataBean> list) {
    this.context = context;
    this.list = list;
}

@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
    View view = LayoutInflater.from(context).inflate(R.layout.left_rec_linear, viewGroup,false);
    ViewHolder viewHolder=new ViewHolder(view);
    return viewHolder;
}

@Override
public void onBindViewHolder(@NonNull ViewHolder viewHolder, int i) {
    final Product.DataBean dataBean = list.get(i);
    viewHolder.title.setText(dataBean.getName());
    viewHolder.itemView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (itemClickListener!=null){
                itemClickListener.click(dataBean.getCid()+"");
            }
        }
    });
}

@Override
public int getItemCount() {
    return list==null?0:list.size();
}

public class ViewHolder extends RecyclerView.ViewHolder {

    private final TextView title;

    public ViewHolder(@NonNull View itemView) {
        super(itemView);
        title = itemView.findViewById(R.id.title);
    }
}
private ItemClickListener itemClickListener;

public void setItemClickListener(ItemClickListener itemClickListener) {
    this.itemClickListener = itemClickListener;
}

public interface ItemClickListener{
    void click(String cid);
}

}
主页面的adapter
package com.example.lenovo.myapplication.adapter;

import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import com.example.lenovo.myapplication.R;
import com.example.lenovo.myapplication.entity.ProductCls;

import java.util.ArrayList;
import java.util.List;

public class RightAdapter extends RecyclerView.Adapter<RightAdapter.ViewHolder> {
private Context context;
private List<ProductCls.DataBean> list;

public RightAdapter(Context context, List<ProductCls.DataBean> list) {
    this.context = context;
    this.list = list;
}

@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
    View view = LayoutInflater.from(context).inflate(R.layout.right_rec_linear, viewGroup, false);
    ViewHolder viewHolder=new ViewHolder(view);
    return viewHolder;
}

@Override
public void onBindViewHolder(@NonNull ViewHolder viewHolder, int i) {
    ProductCls.DataBean dataBean = list.get(i);
    viewHolder.title.setText(dataBean.getName());
    List<ProductCls.DataBean.ListBean> list = dataBean.getList();
    viewHolder.rec.setLayoutManager(new GridLayoutManager(context,3));
    viewHolder.rec.setAdapter(new RightItemAdapter(context,list));
}

@Override
public int getItemCount() {
    return list==null?0:list.size();
}

public class ViewHolder extends RecyclerView.ViewHolder {

    private TextView title;
    private RecyclerView rec;

    public ViewHolder(@NonNull View itemView) {
        super(itemView);
        title = itemView.findViewById(R.id.title);
        rec = itemView.findViewById(R.id.rec);
    }
}

}
里面的adapter
package com.example.lenovo.myapplication.adapter;

import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import com.bumptech.glide.Glide;
import com.example.lenovo.myapplication.R;
import com.example.lenovo.myapplication.entity.ProductCls;

import java.util.ArrayList;
import java.util.List;

public class RightItemAdapter extends RecyclerView.Adapter<RightItemAdapter.ViewHolder> {
private Context context;
private List<ProductCls.DataBean.ListBean> list;

public RightItemAdapter(Context context, List<ProductCls.DataBean.ListBean> list) {
    this.context = context;
    this.list = list;
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
    View view = LayoutInflater.from(context).inflate(R.layout.right_bottom_rec_linear, viewGroup, false);
    ViewHolder viewHolder=new ViewHolder(view);
    return viewHolder;
}

@Override
public void onBindViewHolder(@NonNull ViewHolder viewHolder, int i) {
    ProductCls.DataBean.ListBean listBean = list.get(i);
    Glide.with(context).load(listBean.getIcon()).into(viewHolder.image);
    viewHolder.title.setText(listBean.getName());
}

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

public class ViewHolder extends RecyclerView.ViewHolder {

    private final ImageView image;
    private final TextView title;

    public ViewHolder(@NonNull View itemView) {
        super(itemView);
        image = itemView.findViewById(R.id.imagee);
        title = itemView.findViewById(R.id.titlee);
    }
}

}