RecycleView match_parent属性失效问题

package com.example.mutaoapp.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.LinearLayout;
import android.widget.TextView;

import com.example.mutaoapp.R;
import com.example.mutaoapp.entity.Find_toutiao_item;

import java.util.List;

public class FindMenuToutiaoAdapter extends RecyclerView.Adapter<FindMenuToutiaoViewHolder> {

    Context context;
    List<Find_toutiao_item> itemList;



    public FindMenuToutiaoAdapter(Context context , List<Find_toutiao_item> itemsList){
        this.context = context;
        this.itemList = itemsList;

    }



    @NonNull
    @Override
    public FindMenuToutiaoViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
        View view = LayoutInflater.from(context).inflate(R.layout.find_toutiao_item, null);
        LinearLayout.LayoutParams layoutParamsnew = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
        view.setLayoutParams(layoutParamsnew);
        return new FindMenuToutiaoViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull FindMenuToutiaoViewHolder findMenuToutiaoViewHolder, int i) {

        Find_toutiao_item find_toutiao_item = itemList.get(i);
        findMenuToutiaoViewHolder.imageViewIcon.setImageResource(find_toutiao_item.Icon);
        findMenuToutiaoViewHolder.textViewMsg.setText(find_toutiao_item.touTiaoContext);
        findMenuToutiaoViewHolder.textViewSource.setText(find_toutiao_item.touTiaoMsgSource);
        findMenuToutiaoViewHolder.textViewNumsOfReader.setText(find_toutiao_item.touTiaoNumOfSee);
        findMenuToutiaoViewHolder.getTextViewNumsOfDianzan.setText(find_toutiao_item.touTiaoNumofDianzan);
    }

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

布局都设置的是match_parent ， recycleview子组件布局采用约束布局，实在是查不到原因。作业已提交，希望老师帮忙解决！