Android RecyclerView Adapter notifyDataSetChanged not working
<p>I have read several questions on stackoverflow addressing this problem and implented solutions, but still I cannot update items. By pressing a menu icon, searchString() is invoked. Inside this method i want to update recyclerview item which not works.  Here is related parts of my code:</p>

<pre><code>    /* in my notation, pg is equivalent to page.*/
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_ebook_list, container, false);
    mEbookRecyclerView = (RecyclerView) view.findViewById(R.id.ebook_recycler_view);
    mLayoutManager = new LinearLayoutManager(getActivity());
    mEbookRecyclerView.setLayoutManager(mLayoutManager);
    updateUI();
    return view;
}

@Override
public void onResume() {
    super.onResume();
    updateUI();
}


private void updateUI() {
    if (mAdapter == null) {
        EbookLab ebookLab = EbookLab.get(getActivity());
        List&lt;String&gt; pgs = ebookLab.getPgs();
        mAdapter = new EbookAdapter(pgs);
        mEbookRecyclerView.setAdapter(mAdapter);
    }
}

   /* ******codes for preparation of menus which I have ignored *******/

   private class EbookHolder extends RecyclerView.ViewHolder {
    private String mPg;

    public EbookHolder(LayoutInflater inflater, ViewGroup container) {
        super(inflater.inflate(R.layout.list_item_ebook, container, false));
        mListWebView = (WebView) itemView.findViewById(R.id.list_web_View);
        mListWebView.getSettings().setLoadWithOverviewMode(true);
    }

    public void bindEbook(String pg) {
        mPg = pg;
        mListWebView.loadDataWithBaseURL("file:///android_asset/", mPg, "text/html", "UTF-8", null);
    }
   }

   private class EbookAdapter extends RecyclerView.Adapter&lt;EbookHolder&gt; {
    private List&lt;String&gt; mPgs;
    public EbookAdapter(List&lt;String&gt; pgs) {
        mPgs = pgs;
    }
    @Override
    public EbookHolder onCreateViewHolder(ViewGroup parent, int viewType)
    {
        LayoutInflater layoutInflater = LayoutInflater.from(getActivity());
        return new EbookHolder(layoutInflater, parent);
    }


    @Override
    public void onBindViewHolder(EbookHolder holder, int position) {
        String pg = mPgs.get(position);
        holder.bindEbook(pg);
    }
    @Override
    public int getItemCount() {
        return mPgs.size();
    }
    public void setPgs(List&lt;String&gt; pgs) {
        mPgs.clear();
        mPgs.addAll(pgs);
        notifyDataSetChanged();
    }
}

   public void searchString(String qSrh) {
        EbookLab ebookLab = EbookLab.get(getActivity());
        List&lt;String&gt; pgs = ebookLab.getPgs();
    List&lt;String&gt; tmppgs = new ArrayList&lt;String&gt;(pgs);

   /** Some code for manipulation of tmppgs and updating recyclerview based on the tmppgs **/

   mAdapter.setPgs(tmppgs);
   }
</code></pre>

<p>Any helps is appreciated.</p>