adapter

问题 I modified my code according to the answers I found to similar questions but none of them worked. I am using TabFragments and RecyclerViews. The console displays the error "E/RecyclerView: No adapter attached; skipping layout" four times. (When modifying it also gave me the error "java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.widget.RecyclerView.setLayoutManager(android.support.v7.widget.RecyclerView$LayoutManager)' on a null object reference",

问题 I have to show a list of airports of the world, and user has to choose one of them. So I have made a recyclerview: RecyclerView recyclerView = (RecyclerView)rootView.findViewById(R.id.recyclerview); SearchView searchView = (SearchView)rootView.findViewById(R.id.searchview); recyclerView.setHasFixedSize(true); recyclerView.setLayoutManager(new LinearLayoutManager(getActivity())); final AirportAdapter adapter = new AirportAdapter(airports,getActivity()); recyclerView.setAdapter(adapter);

问题 I have to show a list of airports of the world, and user has to choose one of them. So I have made a recyclerview: RecyclerView recyclerView = (RecyclerView)rootView.findViewById(R.id.recyclerview); SearchView searchView = (SearchView)rootView.findViewById(R.id.searchview); recyclerView.setHasFixedSize(true); recyclerView.setLayoutManager(new LinearLayoutManager(getActivity())); final AirportAdapter adapter = new AirportAdapter(airports,getActivity()); recyclerView.setAdapter(adapter);

问题 Multiple viewType using FirebaseRecyclerAdapter. I studied about RecyclerView that have multiple viewType. And I'm going to apply it in FirebaseRecyclerApdater. I want to show the data in Firebase Realtime Database. But anything shows up in-app. Here my code. public class HolderHomeAdapter extends RecyclerView.Adapter<HolderHomeAdapter.HomeSectionHolder> { private ArrayList<SectionType> sectionList; private Context context; FirebaseRecyclerOptions<ContentModel> options; public static

问题 The related Posts on Stackover flow for this topic : Post_1 and Post_2 Above posts are good but still I could not get answer to my confusion, hence I am putting it as a new post here. MY Questions based on the GOF's Elements of Reusable Object-Oriented Software book content about Pluggable Adapters (mentioned after questions below), hence I would appreciate if the discussions/answers/comments are more focused on the existing examples from GOF regarding the pluggable Adapters rather than other

问题 The related Posts on Stackover flow for this topic : Post_1 and Post_2 Above posts are good but still I could not get answer to my confusion, hence I am putting it as a new post here. MY Questions based on the GOF's Elements of Reusable Object-Oriented Software book content about Pluggable Adapters (mentioned after questions below), hence I would appreciate if the discussions/answers/comments are more focused on the existing examples from GOF regarding the pluggable Adapters rather than other

问题 I have generic class public abstract class BaseAdapter<T> extends RecyclerView.Adapter { private List<T> itemsList = new ArrayList<>(); //other override methods @Override public long getItemId(int position) { return position; } } What is the correct way to implementing getItemId()? I think that return position like in many example is not correct. 回答1: Create a base interface that has a method that returns a type long eg. interface BaseInterface{ long getId(); } Change abstract class

问题 This question already has answers here : recyclerview No adapter attached; skipping layout (34 answers) Closed 8 months ago . Recyclerview is not showing on screen just show white background. Is it there any mistake? Please tell me, thanks. Adapter class NeedsAdapter(var context: Context) : RecyclerView.Adapter<NeedsAdapter.ViewHolder>() { override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): NeedsAdapter.ViewHolder { var view = View.inflate(parent.context, R.layout.needs_item,

问题 To make it clear, I post the code of "how to use" first: AB.h: #include <vector> #include <list> // execpt they both have children, A & B share nothing in common, // even children use different containers struct A { int num; std::vector<A> children; }; struct B { std::string s; float n; std::list<B> children; }; main.cpp: #include "Node.h" // handle A & B with the common interface Node // do not use template, since in practice, print() may be a large library void print(Node& n) { printf("%s\n

问题 Hi i have problem with my adapter, i don't know how to refresh my data in ListView when i use adapter.notifyDataSetChanged() after data changing nothing happen. I wonder if i have to override notifyDataSetChanged() in this class. I hope you will help me. Here is my adapter class: public class ListViewAdapter extends BaseAdapter{ public ArrayList<HashMap<String, String>> list; Activity activity; TextView txtFirst; TextView txtSecond; TextView txtThird; TextView txtFourth; public static final