Android中利用ViewHolder优化自定义Adapter的写法(必看)
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2021-01-20
09:52:31
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Android中利用中利用ViewHolder优化自定义优化自定义Adapter的写法的写法(必看必看)
最近写Adapter写得多了，慢慢就熟悉了。
用ViewHolder，主要是进行一些性能优化，减少一些不必要的重复操作。（WXD同学教我的。）
具体不分析了，直接上一份代码吧：具体不分析了，直接上一份代码吧：
public class MarkerItemAdapter extends BaseAdapter
{
private Context mContext = null;
private List<MarkerItem> mMarkerData = null;
public MarkerItemAdapter(Context context, List<MarkerItem> markerItems)
{
mContext = context;
mMarkerData = markerItems;
}
public void setMarkerData(List<MarkerItem> markerItems)
{
mMarkerData = markerItems;
}
@Override
public int getCount()
{
int count = 0;
if (null != mMarkerData)
{
count = mMarkerData.size();
}
return count;
}
@Override
public MarkerItem getItem(int position)
{
MarkerItem item = null;
if (null != mMarkerData)
{
item = mMarkerData.get(position);
}
return item;
}
@Override
public long getItemId(int position)
{
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent)
{
ViewHolder viewHolder = null;
if (null == convertView)
{
viewHolder = new ViewHolder();
LayoutInflater mInflater = LayoutInflater.from(mContext);
convertView = mInflater.inflate(R.layout.item_marker_item, null);
viewHolder.name = (TextView) convertView.findViewById(R.id.name);
viewHolder.description = (TextView) convertView
.findViewById(R.id.description);
viewHolder.createTime = (TextView) convertView
.findViewById(R.id.createTime);
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