繼承BaseAdapter

摘要： 開發過程中經常用到ListView，因此介面卡要非常熟練。因為模式相對固定，所以擷取一段程式碼作為參考： public class NewsListAdapter extends BaseAdapter { private List<NewsBean.ResultBe...

開發過程中經常用到ListView，因此介面卡要非常熟練。因為模式相對固定，所以擷取一段程式碼作為參考：

public class NewsListAdapter extends BaseAdapter {
private List<NewsBean.ResultBean.DataBean> data;
private Context context;

public NewsListAdapter(List<NewsBean.ResultBean.DataBean>data, Context context) {
this.data = data;
this.context = context;

}

public void setData(List<NewsBean.ResultBean.DataBean> data) {
this.data = data;
}

@Override
public int getCount() {
return data.size();
}

@Override
public Object getItem(int position) {
return position;
}

@Override
public long getItemId(int position) {
return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view;
ViewHolder holder;
if (convertView == null){
view = View.inflate(context, R.layout.item_news,null);
holder = new ViewHolder();
holder.ivIcon= (ImageView) view.findViewById(R.id.iv_icon);
holder.tvTitle= (TextView) view.findViewById(R.id.tv_title);
holder.tvFrom= (TextView) view.findViewById(R.id.tv_from);
holder.tvDate= (TextView) view.findViewById(R.id.tv_date);
view.setTag(holder);
}else { //複用convertView
view = convertView;
holder = (ViewHolder) view.getTag();
}

//資料填充
NewsBean.ResultBean.DataBean dataBean = data.get(position);
holder.tvTitle.setText(dataBean.getTitle());
holder.tvFrom.setText(dataBean.getAuthor_name());
holder.tvDate.setText(dataBean.getThumbnail_pic_s());
if (!TextUtils.isEmpty(dataBean.getThumbnail_pic_s())){
Picasso.with(context)
.load(dataBean.getThumbnail_pic_s())
.placeholder(R.drawable.zhanwei)
.error(R.drawable.zhanwei)
.into(holder.ivIcon);//圖片
}
return view;
}

private static class ViewHolder{
ImageView ivIcon;
TextView tvTitle,tvFrom,tvDate;

}
}