Android——打造万能适配器(CommonAdapter)

List<T> : ListView -> Adapter extends BaseAdapter -> ViewHolder

ViewHolder

CommonAdaper

通用的ViewHolder类

convertView.setTag(holder);

ViewHolder：Item各种控件的引用

Map<int, View> -> SpareArray

getView(int id);

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

　　ViewHolder holder = ...

　　TextView tv  = holder.getView(viewId);

　　tv.setText(...);

}