ListView之ViewHolder模板

    private List<SomeModel> modelLists = null;

    private class MyListSomeModelAdapter extends BaseAdapter{

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

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

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

        @Override
        public View getView(final int position, View convertView, ViewGroup parent) {

            ViewHolder viewHolder = null;

            if(convertView == null){
                convertView = View.inflate(context, R.layout.some_item_view, null);

                viewHolder = new ViewHolder();

                viewHolder.tvNum1 = (TextView) convertView.findViewById(R.id.tv_num1);

                viewHolder.tvNum2 =  (TextView) convertView.findViewById(R.id.tv_num2);

                convertView.setTag(viewHolder);
            }else{
                viewHolder = (ViewHolder) convertView.getTag();
            }

            viewHolder.tvNum1.setText(modelLists.get(position).getNum1());

            viewHolder.tvNum2.setText(modelLists.get(position).getNum2());

            return convertView;
        }

    static class ViewHolder{
        TextView tvNum1;
        TextView tvNum2;
    }