کار نکردن متد setSelection

انجام دادم ولی بازم جواب نمیده لاگ رو نشون میده ولی setSelection کار نمیکنه

public static void gotoListview(final int pos)
{
    expandableListView.post(new Runnable() {
        @Override
        public void run() {
            expandableListView.setSelection(pos);
        }
    });
    Log.d(G.TAG,"pos3:"+pos+"->"+G.foods.get(pos).catName);
}

/**
 * Created by fasav on 2/19/2017.
 */
public class ActivitySplash2 extends AppCompatActivity{
    public static ExpandableListView expandableListView;
    static ExpandableListAdapter expandableListAdapter;
    List<String> expandableListTitle;
    HashMap<String, List<StructFoodsItems>> expandableListDetail;
    //-------------------------------------
    public static ArrayList<String> image;
    public static ArrayList<String> title;
    private ViewPager pager;
    private ImagePagerAdapter adapter;
    private int currentPage=0;
    ProgressDialog progressDialog;
    OnGetDataListener listener;
    int pos=0;
    public static RecyclerView recyclerView;
    public static AdapterRestHeader adapterRestHeader;
    //-------------------------------------
    private static final float PERCENTAGE_TO_SHOW_TITLE_AT_TOOLBAR  = 0.9f;
    private static final float PERCENTAGE_TO_HIDE_TITLE_DETAILS     = 0.3f;
    private static final int ALPHA_ANIMATIONS_DURATION              = 200;

    private boolean mIsTheTitleVisible          = false;
    private boolean mIsTheTitleContainerVisible = false;

    private AppBarLayout appbar;
    private CollapsingToolbarLayout collapsing;
    private FrameLayout framelayoutTitle;
    private LinearLayout linearlayoutTitle;
    private Toolbar toolbar;
    private TextView txtTitle,txtTitle2;

    /**
     * Find the Views in the layout
     * Auto-created on 2016-03-03 11:32:38 by Android Layout Finder
     * (http://www.buzzingandroid.com/tools/android-layout-finder)
     */
    private void findViews() {
        appbar = (AppBarLayout)findViewById( R.id.appbar );
        collapsing = (CollapsingToolbarLayout)findViewById( R.id.collapsing );
        pager = (ViewPager) findViewById( R.id.pager);
        framelayoutTitle = (FrameLayout)findViewById( R.id.framelayout_title );
        linearlayoutTitle = (LinearLayout)findViewById( R.id.linearlayout_title );
        toolbar = (Toolbar)findViewById( R.id.toolbar );
        txtTitle = (TextView)findViewById( R.id.txtTitle );
        txtTitle2 = (TextView)findViewById( R.id.txtTitle2 );
        image=new ArrayList<>();
        title=new ArrayList<>();

    }


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_splash2);
        findViews();
        G.currentActivity=this;
        toolbar.setTitle("?????");
        appbar.addOnOffsetChangedListener(new AppBarLayout.OnOffsetChangedListener() {
            @Override
            public void onOffsetChanged(AppBarLayout appBarLayout, int offset) {
                int maxScroll = appBarLayout.getTotalScrollRange();
                float percentage = (float) Math.abs(offset) / (float) maxScroll;

                handleAlphaOnTitle(percentage);
                handleToolbarTitleVisibility(percentage);
            }
        });
        setSupportActionBar(toolbar);
        startAlphaAnimation(txtTitle, 0, View.VISIBLE);
        LinearLayoutManager layoutManager= new LinearLayoutManager(ActivitySplash2.this, LinearLayoutManager.HORIZONTAL, false);
        layoutManager.setReverseLayout(true);
        recyclerView = (RecyclerView)findViewById(R.id.lstHeader);
        recyclerView.setLayoutManager(layoutManager);
        recyclerView.setItemAnimator(new DefaultItemAnimator());
        recyclerView.setAdapter(adapterRestHeader);
        progressDialog=new ProgressDialog(ActivitySplash2.this);
        progressDialog.setTitle("?? ??? ?????? ???????");
        progressDialog.show();
        initialize();
        txtTitle.setText("?????");
        txtTitle2.setText("?????");
        Command.getResturant(248,listener);
        expandableListView = (ExpandableListView) findViewById(R.id.expandableListView);
        expandableListDetail = new HashMap<String, List<StructFoodsItems>>();

//        expandableListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
//            @Override
//            public boolean onGroupClick(ExpandableListView parent, View v,
//                                        int groupPosition, long id) {
//                return true; // This way the expander cannot be collapsed
//            }
//        });
        expandableListView.setOnScrollListener(new AbsListView.OnScrollListener() {
            @Override
            public void onScrollStateChanged(AbsListView view, int scrollState) {

            }

            @Override
            public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
                Log.d(G.TAG,"firstVisibleItem:"+firstVisibleItem);
                Log.d(G.TAG,"visibleItemCount:"+visibleItemCount);
                Log.d(G.TAG,"totalItemCount:"+totalItemCount);
                if(firstVisibleItem!=pos)
                {
                    pos=firstVisibleItem;
                    for (int i=0;i<G.foods.size();i++)
                    {
                        G.foods.get(i).isSelect=false;
                    }
                    G.foods.get(pos).isSelect=true;
                    adapterRestHeader.notifyDataSetChanged();
                    recyclerView.scrollToPosition(pos);
                }
            }
        });

    }

    private void handleToolbarTitleVisibility(float percentage) {
        if (percentage >= PERCENTAGE_TO_SHOW_TITLE_AT_TOOLBAR) {

            if(!mIsTheTitleVisible) {
                startAlphaAnimation(txtTitle, ALPHA_ANIMATIONS_DURATION, View.VISIBLE);
                mIsTheTitleVisible = false;
            }

        } else {

            if (mIsTheTitleVisible) {
                startAlphaAnimation(txtTitle, ALPHA_ANIMATIONS_DURATION, View.VISIBLE);
                mIsTheTitleVisible = false;
            }
        }
    }

    private void handleAlphaOnTitle(float percentage) {
        if (percentage >= PERCENTAGE_TO_HIDE_TITLE_DETAILS) {
            if(mIsTheTitleContainerVisible) {
                startAlphaAnimation(linearlayoutTitle, ALPHA_ANIMATIONS_DURATION, View.VISIBLE);
                mIsTheTitleContainerVisible = false;
            }

        } else {

            if (!mIsTheTitleContainerVisible) {
                startAlphaAnimation(linearlayoutTitle, ALPHA_ANIMATIONS_DURATION, View.VISIBLE);
                mIsTheTitleContainerVisible = false;
            }
        }
    }

    public static void startAlphaAnimation (View v, long duration, int visibility) {
        AlphaAnimation alphaAnimation = (visibility == View.VISIBLE)
                ? new AlphaAnimation(0f, 1f)
                : new AlphaAnimation(1f, 0f);

        alphaAnimation.setDuration(duration);
        alphaAnimation.setFillAfter(true);
        v.startAnimation(alphaAnimation);
    }
    private void initialize()
    {
        listener=new OnGetDataListener() {
            @Override
            public void onDownloadComplete(boolean complate, String result) {
                progressDialog.dismiss();
                if (complate) {
                    for(int i = 0; i< G.postGallery.size(); i++)
                    {
                        image.add(G.postGallery.get(i));
                        title.add("");
                    }
                    adapter = new ImagePagerAdapter(image,title);
                    pager.setAdapter(adapter);
                    G.foods.get(0).isSelect=true;
                    adapterRestHeader= new AdapterRestHeader(G.foods);
                    recyclerView.setAdapter(adapterRestHeader);
                    for (int i=0;i<G.foods.size();i++)
                    {
                        List<StructFoodsItems> cricket = new ArrayList<>();
                        for(int k=0;k<G.foods.get(i).items.size();k++){
                            cricket.add(G.foods.get(i).items.get(k));
                        }
                        expandableListDetail.put(G.foods.get(i).catName, cricket);
                    }
                    expandableListTitle = new ArrayList<>(expandableListDetail.keySet());
                    expandableListAdapter = new CustomExpandableListAdapter(ActivitySplash2.this, expandableListTitle, expandableListDetail);
                    expandableListView.setAdapter(expandableListAdapter);
                    for ( int i = 0; i < expandableListTitle.size(); i++ ) {
                        expandableListView.expandGroup(i);
                    }
                }
            }
        };
    }
    public static void gotoListview(final int pos)
    {
        expandableListView.post(new Runnable() {
            @Override
            public void run() {
                expandableListView.setSelection(pos);
            }
        });
        Log.d(G.TAG,"pos3:"+pos+"->"+G.foods.get(pos).catName);
    }
}
---------------------------------------این هم آداپتورش

/**
 * Created by fasav on 3/1/2017.
 */
public class AdapterRestHeader  extends RecyclerView.Adapter<AdapterRestHeader.MyViewHolder> {

    private List<StructFoods> Cats;

    public class MyViewHolder extends RecyclerView.ViewHolder {
        public TextView txtLine;
        public TextView txtTitle;

        public MyViewHolder(View view) {
            super(view);
            txtTitle= (TextView) view.findViewById(R.id.txtTitle);
            txtLine= (TextView) view.findViewById(R.id.txtLine);
            txtTitle.setTypeface(G.defaultFont);
        }
    }


    public AdapterRestHeader(List<StructFoods> cats) {
        this.Cats = cats;
    }

    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View itemView = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.adapter_rest_header, parent, false);

        return new MyViewHolder(itemView);
    }

    @Override
    public void onBindViewHolder(final MyViewHolder holder, final int position) {
        StructFoods cat = Cats.get(position);
        holder.txtTitle.setText(cat.catName);
        if(cat.isSelect)
            holder.txtLine.setBackgroundColor(G.currentActivity.getResources().getColor(R.color.colorPrimary));
        else
            holder.txtLine.setBackgroundColor(Color.WHITE);
        holder.txtTitle.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                for (int i=0;i<G.foods.size();i++)
                {
                    G.foods.get(i).isSelect=false;
                }
                G.foods.get(position).isSelect=true;
//                ActivitySplash2.gotoListview(position);
                FragmentRest.gotoListview(position);
                notifyDataSetChanged();
            }
        });
    }
    @Override
    public int getItemCount() {
        return Cats.size();
    }
}