分组(recyclerview嵌套)

效果

分包方式

重要代码
recyclerview嵌套recyclerview
适配器(大的适配器嵌套子适配器)
package com.jia.dividegroups.adapt;

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.jia.dividegroups.R;
import com.jia.dividegroups.bean.RightBean;

import java.util.List;

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

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

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

@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, int i) {
    RightViewHolder rightViewHolder = (RightViewHolder) viewHolder;
    rightViewHolder.right_name.setText(list.get(i).getName());
    List<RightBean.DataBean.ListBean> listBeans = this.list.get(i).getList();
    RightChildAdapter rightChildAdapter = new RightChildAdapter(context, listBeans);
    rightViewHolder.child_recycler.setAdapter(rightChildAdapter);
    rightViewHolder.child_recycler.setLayoutManager(new GridLayoutManager(context,3));
}

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

    private final TextView right_name;
    private final RecyclerView child_recycler;

    public RightViewHolder(@NonNull View itemView) {
        super(itemView);
        right_name = itemView.findViewById(R.id.right_name);
        child_recycler = itemView.findViewById(R.id.child_recycler);
    }
}

}
小适配器
package com.jia.dividegroups.adapt;

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.jia.dividegroups.R;
import com.jia.dividegroups.bean.RightBean;
import com.squareup.picasso.Picasso;

import java.util.List;

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

public RightChildAdapter(Context context, List<RightBean.DataBean.ListBean> list) {
    this.context = context;
    this.list = list;
}

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

@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, int i) {
    ChildViewHolder childViewHolder = (ChildViewHolder) viewHolder;
    childViewHolder.child_name.setText(list.get(i).getName());
    Picasso.with(context).load(list.get(i).getIcon()).into(childViewHolder.image_icon);
}

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

    private final ImageView image_icon;
    private final TextView child_name;

    public ChildViewHolder(@NonNull View itemView) {
        super(itemView);
        image_icon = itemView.findViewById(R.id.image_icon);
        child_name = itemView.findViewById(R.id.child_name);
    }
}

}
其他还和以前一样(M层获取数据)
package com.jia.dividegroups.model;

import com.google.gson.Gson;
import com.jia.dividegroups.bean.RightBean;
import com.jia.dividegroups.callback.RightCallBack;
import com.jia.dividegroups.utils.OkHttpUtils;

import java.io.IOException;
import java.util.List;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;

public class RightModel {
    public void right(int cid, final RightCallBack rightCallBack){
        String url = "http://www.zhaoapi.cn/product/getProductCatagory?cid="+cid;
        OkHttpUtils.enqueueGet(url, new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {

        }

        @Override
        public void onResponse(Call call, Response response) throws IOException {
            String s = response.body().string();
            Gson gson = new Gson();
            RightBean rightBean = gson.fromJson(s, RightBean.class);
            List<RightBean.DataBean> data = rightBean.getData();
            if(rightBean.getCode().equals("0")){
                rightCallBack.onRightCallBackSuccess(data);
            }else{
                rightCallBack.onRightCallBackFailure("展示失败");
            }
        }
    });
}

}

OkHttp请求网络
package com.jia.dividegroups.utils;

import java.util.concurrent.TimeUnit;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.OkHttpClient;
import okhttp3.Request;

public class OkHttpUtils {
    private static OkHttpUtils okHttpUtils = new OkHttpUtils();
    private static OkHttpClient okHttpClient;

private OkHttpUtils(){}
public static OkHttpUtils init(){
    OkHttpClient.Builder builder = new OkHttpClient.Builder();
    builder.connectTimeout(3000,TimeUnit.MILLISECONDS);
    builder.writeTimeout(3000,TimeUnit.MILLISECONDS);
    builder.readTimeout(3000,TimeUnit.MILLISECONDS);
    okHttpClient = builder.build();
    return okHttpUtils;
}
private static Request createRequest(String url,String method){
    Request.Builder builder = new Request.Builder().url(url);
    Request request = builder.build();
    return request;
}
public static void enqueueGet(String url, Callback callback){
    Request request = createRequest(url,"GET");
    Call call = okHttpClient.newCall(request);
    call.enqueue(callback);
}

}