title: RecyclerView wrong position set onBindViewHolder
body: <p>At First, my RecyclerView items are ok, but on scrolling, items are shown on the wrong position for example: item 6 shown in position 67. Although onClick listener and getAdapterPosition() works good and shows correct items. WHY?</p>
  
  <pre><code>import android.content.Context;
  import android.graphics.Typeface;
  import android.support.v7.widget.RecyclerView;
  import android.view.LayoutInflater;
  import android.view.View;
  import android.view.ViewGroup;
  import android.widget.TextView;
  import com.neganet.darotabii.R;
  import com.neganet.darotabii.beans.headers_Bean;
  import java.util.List;
  public class FSecAdapter2 extends RecyclerView.Adapter&lt;FSecAdapter2.mViewHolder&gt; {
  
      private static List&lt;headers_Bean&gt; items_t;
      private static int secNo;
      private Typeface font;
      private boolean showSoreName;
      private static Context mContext;
      private static String сolorString;
  
    private static String fSubjectText="";
      private static Static_Datas static_datas;
      private static QDataGetter dataGetter;
  
  public FSecAdapter2(List&lt;headers_Bean&gt; t_items, Context cnt, int secNo) {
              setHasStableIds(true);
  
              this.mContext=cnt;
              this.items_t = t_items;
              this.static_datas=new Static_Datas(mContext);
              this.secNo=secNo;
           }
  
          public static class mViewHolder extends RecyclerView.ViewHolder  implements View.OnClickListener {
              private OnTitleClickListener titClickListener;
  
              static TextView title;
              public mViewHolder(View itemView) {
                  super(itemView);
                      this.title = (TextView) itemView.findViewById(R.id.title2);
                      this.title.setTypeface(static_datas.get_titr_1_Font());
                      this.title.setOnClickListener(this);
                      this.titClickListener=(OnTitleClickListener) FSecAdapter2.mContext;
              }
              @Override
              public void onClick(View v) {
                      titClickListener.onTitleClick(v,items_t.get(getAdapterPosition()).serial+"*"+items_t.get(getAdapterPosition()).titr);
              }
  
          }
  
          @Override
          public mViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
              View itemView;
              itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.titles_item, parent, false);
              mViewHolder mVH=new mViewHolder(itemView);
              return mVH;
          }
  
          @Override
          public void onBindViewHolder(mViewHolder holder, int position) {
              final headers_Bean curHbean=this.items_t.get(position);
              try {
  
                  holder.title.setText(static_datas.fa_Ye_Ke(curHbean.titr));
             } catch (Exception e) {
                  e.printStackTrace();
              }
  
          }
  
          @Override
          public int getItemCount() {
              return items_t.size();
          }
  
  
  
          public interface OnTitleClickListener {
              public void onTitleClick(View v, String serial);
          }
  
       public void updateData(headers_Bean newHead){
           items_t.add(items_t.size(),newHead);
           notifyItemInserted(items_t.size()-1);
       }}
  </code></pre>
  
  <p>and in fragment:</p>
  
  <pre><code>        mAdapter = new FSecAdapter2(titList,getActivity(),secNo);
      final LinearLayoutManager mLayoutManager = new LinearLayoutManager(this.getActivity());
      mLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
      titRecycle.setLayoutManager(mLayoutManager);
      titRecycle.setItemAnimator(new DefaultItemAnimator());
      titRecycle.setAdapter(mAdapter);
  </code></pre>