gridview适配器

最新推荐文章于 2023-09-26 19:08:44 发布

学无止境0205

最新推荐文章于 2023-09-26 19:08:44 发布

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本文链接：https://blog.youkuaiyun.com/qq_25815655/article/details/51671629

本文介绍了一个自定义的GridView适配器实现方法，包括如何创建适配器类、设置列表项视图及使用ViewHolder模式提高性能。此外还展示了具体的XML布局文件及在Activity中的调用示例。

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public class GridviewAdapter extends BaseAdapter {

protected Context mContext;
public List<AppsItemInfo> list;

public GridviewAdapter(Context context,List<AppsItemInfo> list){

mContext = context;
this.list = list;
}

@Override
public int getCount() {
// TODO Auto-generated method stub
return list.size();
}

@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return list.get(position);
}

@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub

ViewHolder holder = null;
View view = convertView;
if (null == view) {
holder = new ViewHolder();
view = LayoutInflater.from(mContext).inflate(
R.layout.list_item, null);
holder.img = (ImageView)view.findViewById(R.id.IM_image);
holder.title = (TextView)view.findViewById(R.id.TV_title);
view.setTag(holder);
}else {
holder = (ViewHolder)view.getTag();
}

holder.img.setBackgroundDrawable(list.get(position).getIcon());
holder.title.setText(list.get(position).getLabel());
return view;
}

public final class ViewHolder{

public ImageView img;
public TextView title;
}

}

list_item布局

在activity中的用法：

GV_showAllApp = (GridView) findViewById(R.id.GV_showAllApp);
gridviewAdapter = new GridviewAdapter(this, getData());//getData为填充数据
GV_showAllApp.setAdapter(gridviewAdapter);