如何使用 Adapter

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public View getView(int pos, View convertView, ViewGroup parent){    ViewHolder holder;    if (convertView == null) {        convertView = mInflater.inflate(R.layout.list_item, null);        holder = new ViewHolder();         holder.text = (TextView) convertView.findViewById(                R.id.text));        holder.icon = (ImageView) convertView.findViewButId(                R.id.icon));        convertView.setTag(holder);    } else {        holder = (ViewHolder) convertView.getTag();    }     holder.text.setText(DATA[pos]);    holder.icon.setImageBitmap((pos & 1) == 1 ? mIcon1 : mIcon2); 

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