我正在使用RecyclerView
+ CardView
来显示文字列表现在我正在尝试将TextView
标题添加到RecyclerView
的顶部,所以我有适配器内的两个布局,但现在它在应用程序中显示如下:
它必须如下所示:
问题可能在于getItemCount
和getItemViewType
我必须更改的内容,因此标题只显示一次后跟CardViews
。
public class Adapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private static final int LAYOUT_ONE = 0;
private static final int LAYOUT_TWO = 1;
List<AdapterData> mItems;
public Adapter() {
super();
mItems = new ArrayList<>();
AdapterData data = new AdapterData();
data.setCode("dummytext");
data.setResult("dummytext");
mItems.add(data);
data = new AdapterData();
data.setCode("dummytext");
data.setResult("dummytext");
mItems.add(data);
data = new AdapterData();
data.setCode("dummytext");
data.setResult("dummytext");
mItems.add(data);
data = new AdapterData();
data.setCode("dummytext");
data.setResult("dummytext");
mItems.add(data);
data = new AdapterData();
data.setCode("dummytext");
data.setResult("dummytext");
mItems.add(data);
}
@Override
public int getItemViewType(int position) {
return position % 2;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
switch ( viewType ) {
case LAYOUT_ONE: return new ViewHolderFirst(LayoutInflater.from(parent.getContext()).inflate(R.layout.top_textview, parent, false));
case LAYOUT_TWO: return new ViewHolderSecond(LayoutInflater.from(parent.getContext()).inflate(R.layout.recycler_view_card_item, parent, false));
}
return null;
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
switch (getItemViewType(position)) {
case LAYOUT_ONE:
ViewHolderFirst viewHolderFirst = (ViewHolderFirst)holder;
break;
case LAYOUT_TWO:
ViewHolderSecond viewHolderSecond = (ViewHolderSecond)holder;
AdapterData data = mItems.get(position);
viewHolderSecond.code.setText(data.getCode());
viewHolderSecond.result.setText(data.getResult());
break;
}
}
@Override
public int getItemCount() {
return mItems.size();
}
class ViewHolderFirst extends RecyclerView.ViewHolder {
public TextView header;
public ViewHolderFirst(View itemView) {
super(itemView);
header = (TextView)itemView.findViewById(R.id.header_textview);
}
}
class ViewHolderSecond extends RecyclerView.ViewHolder{
public TextView code;
public TextView result;
public ViewHolderSecond(View itemView) {
super(itemView);
code = (TextView)itemView.findViewById(R.id.sims_code);
result = (TextView)itemView.findViewById(R.id.sims_result);
}
}
}
答案 0 :(得分:3)
在getItemViewType()中试试这个
@Override
public int getItemViewType(int position) {
return (position==0) ? 0 : 1; //try this line
}