我刚刚制作了一个回收器 View ，但它没有工作，所以我在 getItemCount 上设置了一个断点，但该方法没有被调用。我从未见过 SO 上的任何其他人有这个特定问题，我相信这是非常明显的事情。这是我的代码。
public class SearchAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private ArrayList<Object> displayList;
public static class ViewHolder extends RecyclerView.ViewHolder {
public ViewHolder(View v) {
super(v);
}
}
public class ErrorSearchItem extends ViewHolder {
//this is here if there is no other viewholder
public ErrorSearchItem(View view) {
super(view);
}
}
public class HeaderViewHolder extends ViewHolder {
public HeaderViewHolder(View view) {
super(view);
}
}
@Override
public int getItemViewType(int position) {
return position;
}
public SearchAdapter(ArrayList<Object> displayList) {
this.displayList = displayList;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if (displayList.get(viewType) instanceof String){
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.row_search_title, parent, false);
return new HeaderViewHolder(itemView);
}
else{ //this is for if there is an error and no other xml files match
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.row_error_search_item, parent, false);
return new ErrorSearchItem(itemView);
}
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
}
@Override
public int getItemCount() {
return displayList.size();
}
@Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
}
}
编辑: fragment 代码:
private RecyclerView recyclerView;
private SearchAdapter searchAdapter;
recyclerView = (RecyclerView) v.findViewById(R.id.recycler_view);
searchAdapter = new SearchAdapter(categorizedArray);
recyclerView.setItemAnimator(new DefaultItemAnimator());
recyclerView.setAdapter(searchAdapter);
最佳答案
在应用适配器之前添加recycler.setLayoutManager(new LinearLayoutManager(this));
关于android - 回收站 View 未调用 getItemCount，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/41522567/