适配器

import android.content.Context;
import android.graphics.Bitmap;
import android.view.TextureView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.assist.ImageScaleType;

import java.util.List;

public class MyAdapter extends BaseAdapter {
    private Context context;
    private List<Bean.NewslistBean> datas;
    //显示图片配置
    private DisplayImageOptions options;

    public MyAdapter(Context context, List<Bean.NewslistBean> datas) {
        this.context = context;
        this.datas = datas;
        options=new DisplayImageOptions.Builder()
                .cacheInMemory(true)//使用内存缓存
                .cacheOnDisk(true)//使用磁盘缓存
                .showImageOnLoading(R.mipmap.ic_launcher_round)//设置正在下载的图片
                .showImageForEmptyUri(R.mipmap.ic_launcher_round)//url为空或请求的资源不存在时
                .showImageOnFail(R.mipmap.ic_launcher_round)//下载失败时显示的图片
                .bitmapConfig(Bitmap.Config.RGB_565)//设置图片色彩模式
                .imageScaleType(ImageScaleType.EXACTLY)//设置图片的缩放模式
                .build();

    }

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

    @Override
    public Object getItem(int i) {
        return datas.get(i);
    }

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

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        ViewHolder holder;
        if(view==null){
            view=View.inflate(context,R.layout.item,null);
            holder=new ViewHolder();
            holder.img=view.findViewById(R.id.img);
            holder.textView=view.findViewById(R.id.tv);
            view.setTag(holder);
        }else{
            holder= (ViewHolder) view.getTag();
        }
        //设置图片缓存 路径
        ImageLoader.getInstance().displayImage(datas.get(i).getPicUrl(),holder.img,options);
        return view;

    }

    class ViewHolder{
        ImageView img;
        TextView textView;
    }
}