java - ViewPager 没有快速响应

Question

在使用 ViewPager 时，我注意到它不会很快响应，这意味着它在切换 fragment 时会变慢，有点滞后。 有谁知道此代码是如何导致问题的？

public class List_adapter : BaseAdapter<Element>
{
    public List<Element> _list; 
    FragmentOne _context;


    public List_adapter(FragmentOne context, List<Element> list) 
    {                                                 
    super(context, list);                     
        _list = list;
        _context = context;
    }
    @Override
    public int getCount() 
    {
        return _list.size();
    }
    @Override
    public Object getItem(int position) 
    {
        return _list.get(position);
    }
    @Override
    public long getItemId(int position) 
    {
        return getItem(position).hashCode();
    }
    @Override
    public View getView(int position, View convertView, ViewGroup parent) 
    {
        LayoutInflater inflater = (LayoutInflater)getActivity().getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View view = inflater.inflate(R.layout.row, parent, false); 
        Element item = getItem(position);
        TextView lbl = (TextView)view.findViewById(R.id.label);
        TextView prop = (TextView)view.findViewById(R.id.Prop);
        lbl.setText(item.getlabel()); 
        prop.setText(item.getprop()); 
        return view; 
    }


}

Answer 1

1. 使用ViewHolder pattern平滑列表滚动
2. 实现 Offscreen page limit用于在 ViewPager
中显示之前初始化 View