Android学习记录-使用ViewHolder使listView滑动顺畅

当View加载或者回收时候都会通过findViewById（）去查找View，假如分层很多，很耗时，这时采用ViewHolder，使用时候直接去取，不需要查找。

具体代码：

//在你自己的游标类里public static class ViewHolder {    public final ImageView iconView;    public final TextView dateView;    public final TextView descriptionView;    public final TextView highTempView;    public final TextView lowTempView;    public ViewHolder(View view) {        iconView = (ImageView)view.findViewById(R.id.list_item_icon);        dateView = (TextView)view.findViewById(R.id.list_item_date_textview);        descriptionView = (TextView) view.findViewById(R.id.list_item_forecast_textview);        highTempView = (TextView) view.findViewById(R.id.list_item_high_textview);        lowTempView = (TextView) view.findViewById(R.id.list_item_low_textview);    }}//在newView方法里View view = LayoutInflater.from(context).inflate(layoutId,parent,false);ViewHolder viewHolder = new ViewHolder(view);view.setTag(viewHolder);//在bindView方法里//使用viewHolder来访问ViewViewHolder viewHolder = (ViewHolder) view.getTag();   viewHolder.iconView.setImageResource(R.drawable.ic_launcher);