我需要这样做：使用CardView的RecycleView.第一张卡是静态的：它显示“此订单的详细信息”.第一个之后的其他卡是动态的.所以我决定做这个代码：
public class DocumentTypeAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>
{
private List<DocumentType> document; //lista di card da riempire
private Context context;
public DocumentTypeAdapter(List<DocumentType>document,Context context)
{
this.document = document;
this.context = context;
}
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent,int viewType)
{
View view;
if(viewType == 0)
{
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.card_info,parent,false);
ViewSimple simpleView = new ViewSimple(view);
return simpleView;
}
else
{
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.card_info,false);
DocumentTypeViewHolder documentTypeViewHolder = new DocumentTypeViewHolder(view);
return documentTypeViewHolder;
}
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder,int position)
{
DocumentType documents = document.get(position);
if(getItemViewType(position)!=0)
{
holder.title.setText(documents.getTitle());
holder.cert.setText(documents.getTypeofCertificate());
holder.lastmod.setText(documents.getLastModified());
}
}
@Override
public int getItemCount()
{
return document.size();
}
@Override
public int getItemViewType(int position)
{
return document.size();
}
private class ViewSimple extends RecyclerView.ViewHolder
{
public ViewSimple(View itemView)
{
super(itemView);
}
}
public class DocumentTypeViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener
{
TextView title,lastmod,cert;
public DocumentTypeViewHolder(View itemView)
{
super(itemView);
title = (TextView)itemView.findViewById(R.id.tipo);
lastmod = (TextView)itemView.findViewById(R.id.ultimamodifica);
cert = (TextView)itemView.findViewById(R.id.certificato);
itemView.setOnClickListener(this);
}
@Override
public void onClick(View v)
{
}
}
}
但它不起作用.
我的问题是：
>如何使第一张卡静态和其他动态？
>我的数据在文档列表中.那么如何对方法getItemViewType()说第一张卡是静态的,其他卡是从列表文档的大小生成的？
编辑：这是带有更改的代码：
public class DocumentTypeAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>
{
private static final int STATIC_CARD = 0;
private static final int DYNAMIC_CARD = 1;
private List<DocumentType> document;
private Context context;
public DocumentTypeAdapter(List<DocumentType>document,int viewType)
{
View view;
if(viewType == STATIC_CARD)
{
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.card_info,false);
ViewSimple simpleView = new ViewSimple(view);
return simpleView;
}
else
{
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.document_card_type,int position)
{
DocumentType documents = document.get(position);
if(getItemViewType(position)==DYNAMIC_CARD)
{
DocumentTypeViewHolder mHolder = (DocumentTypeViewHolder)holder;
mHolder.data.setText(documents.getData());
mHolder.status.setText(documents.getStatus());
Picasso.with(context).load(documents.getImage().toString()).into(mHolder.image,new com.squareup.picasso.Callback() {
@Override
public void onSuccess() {
Log.d("Picasso","success");
}
@Override
public void onError()
{
Log.d("Picasso","error");
}
});
}
}
@Override
public int getItemCount()
{
return document.size();
}
@Override
public int getItemViewType(int position)
{
if(position == 0)
return STATIC_CARD;
else
return DYNAMIC_CARD;
}
private class ViewSimple extends RecyclerView.ViewHolder
{
public ViewSimple(View itemView)
{
super(itemView);
}
}
public class DocumentTypeViewHolder extends RecyclerView.ViewHolder
{
TextView data,status;
ImageView image;
public DocumentTypeViewHolder(View itemView)
{
super(itemView);
data = (TextView)itemView.findViewById(R.id.dateCharging);
status =(TextView)itemView.findViewById(R.id.statusCharging);
image = (ImageView)itemView.findViewById(R.id.documentImage);
}
}
}
谢谢你的回答
解决方法
您应该覆盖getItemViewType()并使其在应该是动态卡或静态卡时返回不同的值.由于您希望第一张卡是静态的,因此当位置== 0时,您应该返回不同的值.这看起来像这样：
private static final int STATIC_CARD = 0;
private static final int DYNAMIC_CARD = 1;
@Override
public int getItemViewType(int position) {
if(position == 0) {
return STATIC_CARD;
} else {
return DYNAMIC_CARD;
}
}
然后在你的onCreateViewHolder()方法中,你应该检查viewType并根据你应该给视图充气的结果,你已经做好了,但我会用私有静态最终的int STATIC_CARD替换硬编码的0.
编辑：刚出现在我的脑海中,如果您只需要一张静态卡,您可能需要考虑在Fragment / Activity xml布局中放置一个CardView,并将其余的动态卡放在该静态卡下面的RecyclerView中.
