在CustomListView中使用毕加索从URL加载图像

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 com.squareup.picasso.Picasso;

import java.util.List;

public class CustomListViewAdapter extends BaseAdapter {
    private Context context;
    private List<String> imageUrlList;

    public CustomListViewAdapter(Context context, List<String> imageUrlList) {
        this.context = context;
        this.imageUrlList = imageUrlList;
    }

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

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

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

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder viewHolder;

        if (convertView == null) {
            convertView = LayoutInflater.from(context).inflate(R.layout.list_item, parent, false);
            viewHolder = new ViewHolder();
            viewHolder.imageView = convertView.findViewById(R.id.image_view);
            convertView.setTag(viewHolder);
        } else {
            viewHolder = (ViewHolder) convertView.getTag();
        }

        String imageUrl = imageUrlList.get(position);
        Picasso.with(context).load(imageUrl).into(viewHolder.imageView);

        return convertView;
    }

    private static class ViewHolder {
        ImageView imageView;
    }
}