ListView的性能提升

public class Fruite{
    private String name;
    private int imageId;
    public Fruit(String name,int imageId){
        this.name = name;
        this.imageId = imageId;
    }
}

public class FruitAdapter extends ArrayAdapter<Fruit>{
    private int resourceId;
    public FruitAdapter(Context context,int textViewresourceId,
                                        List<Fruit> objects){
                super(context,textViewResourceId,objects);
                resourceId = textViewResourceId;
    }
    
public View getView(int position, View convertView, ViewGroup parent) {
    Fruit fruit = getItem(position);
    View view;
    ViewHolder viewHolder;
    if (convertView == null) {
    view = LayoutInflater.from(getContext()).inflate(resourceId,     null);
    viewHolder = new ViewHolder();
    viewHolder.fruitImage = (ImageView) view.findViewById
(R.id.fruit_image);
    viewHolder.fruitName = (TextView) view.findViewById
(R.id.fruit_name);
    view.setTag(viewHolder); // 将ViewHolder存储在View中
} else {
    view = convertView;
    viewHolder = (ViewHolder) view.getTag(); // 重新获取ViewHolder
}
            viewHolder.fruitImage.setImageResource(fruit.getImageId());
    viewHolder.fruitName.setText(fruit.getName());
    return view;     
}                   

class ViewHolder {
ImageView fruitImage;
TextView fruitName;
}