public class NewsAdapter extends BaseAdapter
{
    private LayoutInflater mInflater;
    private List<NewsBean> mNewsList;
    private Context context;//glide加載用
   
    public NewsAdapter(Context context, List<NewsBean> listNewsBean){
        this.mInflater = LayoutInflater.from(context);
        this.mNewsList = listNewsBean;
        this.context=context;
    }

    @Override
    public int getCount ( )
    {   //適配器中數(shù)據(jù)集的數(shù)據(jù)個數(shù)
        return mNewsList==null?0:mNewsList.size();
    }

    @Override
    public Object getItem ( int position )
    {   //獲取數(shù)據(jù)集中與所給索引對應(yīng)的數(shù)據(jù)項
        return mNewsList.get(position);
    }

    @Override
    public long getItemId ( int position )
    {   //獲取指定行對應(yīng)的ID
        return position;
    }
  
    @Override
    public View getView (int position, View convertView, ViewGroup parent)
    {   //獲取每一個Item顯示內(nèi)容view
        ViewHolder viewHolder=null; 
        //實例化view,獲取控件id
        if (convertView == null) 
        { 
            //View未實例化耍目，緩存池中無緩存啡邑；需要創(chuàng)建利朵；
            //convertView的回收重用機制。
            convertView = mInflater.inflate(R.layout.newslistview_item, null); 
            viewHolder = new ViewHolder(); 
            viewHolder.title = (TextView) convertView.findViewById(R.id.item_title); 
            viewHolder.description = (TextView) convertView.findViewById(R.id.item_des); 
            viewHolder.thumb = (ImageView) convertView.findViewById(R.id.item_thumb);  
            //View中的setTag(Onbect)表示給View添加一個格外的數(shù)據(jù)，以后可以用getTag()將這個數(shù)據(jù)取出來。
            convertView.setTag(viewHolder); 
        } 
        else 
        { 
            viewHolder = (ViewHolder) convertView.getTag(); 
        } 
        //設(shè)置數(shù)據(jù)
        NewsBean newsBean =mNewsList.get(position); 
        viewHolder.title.setText(newsBean.getTitle()); 
        viewHolder.description.setText(newsBean.getDescription()); 
        Glide.with(context)
            .load(newsBean.getThumb())
            .into(viewHolder.thumb);
        return convertView;
        
    }
    //避免重復(fù)findViewById
    private class ViewHolder { 
        ImageView thumb; 
        TextView title; 
        TextView description;
    }
}

主活動代碼