RecyclerView问题

在热门头条中加载不出来RecyclerView问题

实现的代码如下：

声明recyclerview组件

<android.support.v7.widget.RecyclerView
    android:background="#000"
    android:layout_below="@id/find_hot_news_line"
    android:id="@+id/recyclerView_find_news_list"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
</android.support.v7.widget.RecyclerView>

子项布局文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="#fff"
    android:orientation="horizontal">
     <LinearLayout
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_weight="1"
         android:orientation="vertical">

         <TextView
             android:id="@+id/news_title"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:text="从广州去到东莞仅需要半个小时，美食美景统统都在等着你"
             android:textColor="#000"
             android:layout_marginTop="15dp"/>
         <LinearLayout
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_marginTop="10dp">
             <TextView
                 android:id="@+id/news_author"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:text="源自：羊城晚报"
                 android:textColor="#969696"
                 android:layout_marginRight="5dp"/>

             <ImageView
                 android:id="@+id/news_likesIcon"
                 android:layout_width="20dp"
                 android:layout_height="20dp"
                 android:src="@mipmap/find_hot_yes"
                 android:layout_marginLeft="50dp"/>
             <TextView
                 android:id="@+id/readersNumber"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:text="15"
                 android:textColor="#969696"
                 android:layout_marginRight="5dp"/>


             <ImageView
                 android:id="@+id/readersIcon"
                 android:layout_width="20dp"
                 android:layout_height="20dp"
                 android:src="@mipmap/find_hot_eye"
                 android:layout_marginRight="5dp"
                 android:layout_marginLeft="5dp"/>
             <TextView
                 android:id="@+id/news_likes_number"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:text="20"
                 android:textColor="#969696"
                 android:layout_marginLeft="5dp"/>
         </LinearLayout>
     </LinearLayout>

    <ImageView
        android:id="@+id/news_Icon"
        android:layout_width="100dp"
        android:layout_height="90dp"
        android:src="@mipmap/find_hot_city"
        />
</LinearLayout>

适配器：

package com.example.vincent.mooctravel.adapter;

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.example.vincent.mooctravel.R;
import com.example.vincent.mooctravel.entity.news;
import java.util.List;

public class HotNewsAdapter extends RecyclerView.Adapter<HotNewsAdapter.ViewHolder>{

    private List<news> newsList;

    static class ViewHolder extends RecyclerView.ViewHolder {
        ImageView imageView_newsIcon;
        ImageView imageView_readersIcon;
        ImageView imageView_likesIcon;
        TextView textView_title;
        TextView textView_author;
        TextView textView_likesNumber;
        TextView textView_readersNumber;
        public ViewHolder(View itemView) {
            super(itemView);
            imageView_likesIcon=itemView.findViewById(R.id.news_likesIcon);
            imageView_newsIcon=itemView.findViewById(R.id.news_Icon);
            imageView_readersIcon=itemView.findViewById(R.id.readersIcon);
            textView_title=itemView.findViewById(R.id.news_title);
            textView_author=itemView.findViewById(R.id.news_author);
            textView_likesNumber=itemView.findViewById(R.id.news_likes_number);
            textView_readersNumber=itemView.findViewById(R.id.readersNumber);
        }
    }

    public HotNewsAdapter(List<news> newsList) {
        this.newsList = newsList;
    }
    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.item_find_hot_news,
                parent,false);
        ViewHolder holder=new ViewHolder(view);
        return holder;
    }
    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        news n=newsList.get(position);
        holder.textView_readersNumber.setText(n.getReadersNumber());
        holder.textView_likesNumber.setText(n.getLikesNumber());
        holder.textView_author.setText(n.getAuthor());
        holder.textView_title.setText(n.getTitle());
        holder.imageView_readersIcon.setImageResource(n.getReadersIcon());
        holder.imageView_newsIcon.setImageResource(n.getEssayIcon());
        holder.imageView_likesIcon.setImageResource(n.getLikesIcon());
    }
    @Override
    public int getItemCount() {
        return newsList.size();
    }
}

发现模块fragment：

package com.example.vincent.mooctravel.fragment;

import android.app.Fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.example.vincent.mooctravel.R;
import com.example.vincent.mooctravel.adapter.HotNewsAdapter;
import com.example.vincent.mooctravel.entity.news;
import com.example.vincent.mooctravel.Utils.dataUtil;

import java.util.List;

/**
 * Created by vincent on 2018/2/9/0009.
 */

public class FindFragment extends android.support.v4.app.Fragment {
    private RecyclerView recyclerView;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
                             Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_find,container,false);
    }
    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        recyclerView=getView().findViewById(R.id.recyclerView_find_news_list);
        recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
        HotNewsAdapter adapter=new HotNewsAdapter(dataUtil.getNewsList());
        recyclerView.setAdapter(adapter);
    }
}

获取构建适配器所需的List列表的静态方法

public  static  List<news> getNewsList(){
    String title[]={"从广州去到东莞仅需要半个小时，美食美景统统都在等着你",
            "旅行前最应该准备的事件事项，千万别给忽略了",
            "北京周边竟然藏着20个人间仙境，你绝对不能错过"};
    String author[]={"源自:羊城攻略","源自:冬夏旅游","源自:北京攻略"};
    int essayIcon[]={R.mipmap.find_hot_city,R.mipmap.find_hot_home,R.mipmap.find_hot_jiangnan};
    int readersIcon=R.id.readersIcon;
    int likesIcon=R.id.news_likesIcon;
    String readersNumber []={"12","15","16"};
    String likesNumber []={"9","2","5"};
    List<news> newsList=new ArrayList();
    for(int i=0;i<3;i++){
        news n=new news(title[i],author[i],essayIcon[i],
                readersIcon,likesIcon,readersNumber[i],likesNumber[i]);
        newsList.add(n);
    }
    return newsList;
    }