ArrayAdapter是Android中用于將數據綁定到列表視圖(如ListView,GridView等)的一個類。要提高列表渲染速度,可以采取以下策略:
public class MyArrayAdapter extends ArrayAdapter<String> {
private LayoutInflater mInflater;
public MyArrayAdapter(Context context, int resource, List<String> objects) {
super(context, resource, objects);
mInflater = LayoutInflater.from(context);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.list_item, parent, false);
viewHolder = new ViewHolder();
viewHolder.textView = convertView.findViewById(R.id.text_view);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
viewHolder.textView.setText(getItem(position));
return convertView;
}
static class ViewHolder {
TextView textView;
}
}
請注意,以上策略并非適用于所有情況。在實際開發中,需要根據具體需求和場景來選擇合適的優化方法。