Notifydatasetchanged not applicable to recyclerview - notifydatasetchanged not working on recyclerview

problem ：

I am getting data from server and then parsing it and storing it in a List. I get data from the server , Then parse it and store it in a list .I am using this list for the RecyclerView's adapter. I use this list for RecyclerView Adapter for .I am using Fragments. I'm using clips .

I am using a Nexus 5 with KitKat. I'm using KitKat Of Nexus 5.I am using support library for this. I'm using support libraries for this .Will this make a difference? Will this make a difference ？

Here is my code: (Using dummy data for the question) This is my code ：（ Use virtual data for the problem ）

Member Variables: Member variables ：

List<Business> mBusinesses = new ArrayList<Business>();RecyclerView recyclerView;RecyclerView.LayoutManager mLayoutManager;BusinessAdapter mBusinessAdapter;

My onCreateView() : my onCreateView() ：

@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,        Bundle savedInstanceState) {    // Getting data from server    getBusinessesDataFromServer();    View view = inflater.inflate(R.layout.fragment_business_list,            container, false);    recyclerView = (RecyclerView) view            .findViewById(R.id.business_recycler_view);    recyclerView.setHasFixedSize(true);    mLayoutManager = new LinearLayoutManager(getActivity());    recyclerView.setLayoutManager(mLayoutManager);    mBusinessAdapter = new BusinessAdapter(mBusinesses);    recyclerView.setAdapter(mBusinessAdapter);    return view;}

After getting data from server, parseResponse() is called. After getting data from the server , call parseResponse() .

protected void parseResponse(JSONArray response, String url) {    // insert dummy data for demo    mBusinesses.clear();    Business business;    business = new Business();    business.setName("Google");    business.setDescription("Google HeadQuaters");    mBusinesses.add(business);    business = new Business();    business.setName("Yahoo");    business.setDescription("Yahoo HeadQuaters");    mBusinesses.add(business);    business = new Business();    business.setName("Microsoft");    business.setDescription("Microsoft HeadQuaters");    mBusinesses.add(business);    Log.d(Const.DEBUG, "Dummy Data Inserted\nBusinesses Length: "            + mBusinesses.size());    mBusinessAdapter = new BusinessAdapter(mBusinesses);    mBusinessAdapter.notifyDataSetChanged();}

My BusinessAdapter: My business adapter ：

public class BusinessAdapter extends    RecyclerView.Adapter<BusinessAdapter.ViewHolder> {    private List<Business> mBusinesses = new ArrayList<Business>();    // Provide a reference to the type of views that you are using    // (custom viewholder)    public static class ViewHolder extends RecyclerView.ViewHolder {        public TextView mTextViewName;        public TextView mTextViewDescription;        public ImageView mImageViewLogo;        public ViewHolder(View v) {            super(v);            mTextViewName = (TextView) v                    .findViewById(R.id.textView_company_name);            mTextViewDescription = (TextView) v                    .findViewById(R.id.textView_company_description);            mImageViewLogo = (ImageView) v                    .findViewById(R.id.imageView_company_logo);        }    }    // Provide a suitable constructor (depends on the kind of dataset)    public BusinessAdapter(List<Business> myBusinesses) {        Log.d(Const.DEBUG, "BusinessAdapter -> constructor");        mBusinesses = myBusinesses;    }    // Create new views (invoked by the layout manager)    @Override    public BusinessAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,            int viewType) {        Log.d(Const.DEBUG, "BusinessAdapter -> onCreateViewHolder()");        // create a new view        View v = LayoutInflater.from(parent.getContext()).inflate(                R.layout.item_business_list, parent, false);        ViewHolder vh = new ViewHolder(v);        return vh;    }    // Replace the contents of a view (invoked by the layout manager)    @Override    public void onBindViewHolder(ViewHolder holder, int position) {        // - get element from your dataset at this position        // - replace the contents of the view with that element        Log.d(Const.DEBUG, "BusinessAdapter -> onBindViewHolder()");        Business item = mBusinesses.get(position);        holder.mTextViewName.setText(item.getName());        holder.mTextViewDescription.setText(item.getDescription());        holder.mImageViewLogo.setImageResource(R.drawable.ic_launcher);    }    // Return the size of your dataset (invoked by the layout manager)    @Override    public int getItemCount() {        Log.d(Const.DEBUG, "BusinessAdapter -> getItemCount()");        if (mBusinesses != null) {            Log.d(Const.DEBUG, "mBusinesses Count: " + mBusinesses.size());            return mBusinesses.size();        }        return 0;    }}

But I don't get the data displayed in the view. But I didn't get the data displayed in the view .What am I doing wrong? What on earth did I do wrong ？

Here is my log, This is my diary ,

07-14 21:15:35.669: D/xxx(2259): Dummy Data Inserted07-14 21:15:35.669: D/xxx(2259): Businesses Length: 307-14 21:26:26.969: D/xxx(2732): BusinessAdapter -> constructor

I don't get any logs after this. I haven't received any logs since .Shouldn't getItemCount() in adapter should be called again? You should not call... In the adapter again getItemCount() Do you ？

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Solution ：

Reference resources ： https://stackoom.com/en/question/1fo9F