listview优化

#欢迎来到风的博客

###listview优化

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 @Override
    public View getView(int position, View convertView, ViewGroup parent) {
//        LayoutInflater inflater = LayoutInflater.from(context);
//        layout = (LinearLayout) inflater.inflate(R.layout.item, null);
//        TextView tvName = (TextView) layout.findViewById(R.id.tvName);
//        TextView tvNumber = (TextView) layout.findViewById(R.id.tvNumber);
//        tvName.setText(list.get(position).getName());
//        tvNumber.setText(list.get(position).getNumber());
        //listview优化
        ViewHolder holder;
        if (convertView == null) {
            convertView = LayoutInflater.from(context).inflate(R.layout.item, null);
            holder = new ViewHolder();
            holder.tvName = (TextView) convertView.findViewById(R.id.tvName);
            holder.tvNumber = (TextView) convertView.findViewById(R.id.tvNumber);
            holder.tvName.setText(list.get(position).getName());
            holder.tvNumber.setText(list.get(position).getNumber());
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
            holder.tvName.setText(list.get(position).getName());
            holder.tvNumber.setText(list.get(position).getNumber());
        }
//return layout
        return convertView;
    }
    private static class ViewHolder{
        TextView tvName;
        TextView tvNumber;
    }