news_client/app/src/main/java/com/example/myapplication/NewsAdapter.java

package com.example.myapplication;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.List;

public class NewsAdapter extends BaseAdapter {

    private List<NewBean> mList;
    private LayoutInflater mInflater;

    public NewsAdapter(Context context, List<NewBean> data){
        mList = data;
        mInflater = LayoutInflater.from(context);
    }

    @Override
    public int getCount() {
        return mList.size();
    }

    @Override
    public Object getItem(int position) {
        return mList.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder viewHolder = null;
        if(convertView == null){
            viewHolder = new ViewHolder();
            convertView = mInflater.inflate(R.layout.item_layout, null);
            viewHolder.newPic = convertView.findViewById(R.id.new_pic);
            viewHolder.newTitle = convertView.findViewById(R.id.new_title);
            viewHolder.newTime = convertView.findViewById(R.id.new_time);
            viewHolder.newDesc = convertView.findViewById(R.id.new_desc);
            viewHolder.newContent = convertView.findViewById(R.id.new_content);
            convertView.setTag(viewHolder);
        }else{
            viewHolder = (ViewHolder) convertView.getTag();
        }
        viewHolder.newPic.setImageResource(R.mipmap.ic_launcher);
        String url = mList.get(position).getPicUrl();
        viewHolder.newPic.setTag(url);
        new ImageLoader().showImagerByThread(viewHolder.newPic, mList.get(position).getPicUrl());
        viewHolder.newTitle.setText(mList.get(position).getTitle());
        viewHolder.newTime.setText(mList.get(position).getTime());
        viewHolder.newDesc.setText(mList.get(position).getDesc());
        viewHolder.newContent.setText(mList.get(position).getContentUrl());
        return convertView;
    }

    class ViewHolder{
        public TextView newTitle, newTime, newDesc, newContent;
        public ImageView newPic;
    }
}