We introduce material design

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
        View view = layoutInflater.inflate(R.layout.main_adapter_griditem, null);
        return new ViewHolder(view);
    }

    class ViewHolder extends RecyclerView.ViewHolder{
        private ImageView stgvImageView;
        public ViewHolder(View holderView) {
            super(holderView);
            stgvImageView = (ImageView) holderView.findViewById(R.id.stgvImageView);
        }
    }

    public RecyclerView gridView;//здесь был Grid/ListView
    public AdapterMain adapterMain;
    public ArrayList rows;
    //Это способ отображения recycleview. Кроме сетки с столбцами переменной высоты есть более канонические
    //GridLayoutManager (Grid) и LinearLayoutManager (List)
    public StaggeredGridLayoutManager mLayoutManager;
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        aq = new AQuery(getActivity());
        //Не пугайтесь это просто контейнер
        final LinearLayout linearLayout = new LinearLayout(getActivity());
        linearLayout.setOrientation(LinearLayout.VERTICAL);
        linearLayout.setGravity(Gravity.CENTER);
        gridView = new RecyclerView(getActivity());
        gridView.setHasFixedSize(true);
        mLayoutManager = new StaggeredGridLayoutManager(UtilsScreen.getDisplayColumns(getActivity()),StaggeredGridLayoutManager.VERTICAL);
        //можно задать горизонтальную ориентацию. Будет свежо и необычно. Наверное
        gridView.setLayoutManager(mLayoutManager);
        gridView.setItemAnimator(new DefaultItemAnimator());
        //Это новый метод для задания divider
        //gridView.addItemDecoration(new DividerItemDecoration(getActivity()));
        //Этих методов больше нет
        //gridView.setSmoothScrollbarEnabled(true);
        //gridView.setDivider(new ColorDrawable(this.getResources().getColor(R.color.gray_divider)));
        //gridView.setDividerHeight(UtilsScreen.dpToPx(8));
        rows = new ArrayList();
        linearLayout.addView(gridView);
        return linearLayout;
    }

    @Override
    public void onViewCreated(View view,Bundle savedInstanceState) {
        super.onViewCreated(view,savedInstanceState);
        adapterMain = new AdapterMain(getActivity(),rows);
        gridView.setAdapter(adapterMain);
        gridView.setOnScrollListener(onScroll);
    }

            adapterMain.notifyDataSetChanged();
            if (page == 1) gridView.scrollToPosition(0);//точно не помню как раньше назывался этот метод

    gridView.setOnScrollListener(onScroll);
    //---
    private RecyclerView.OnScrollListener onScroll = new RecyclerView.OnScrollListener() {
        @Override
        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
            super.onScrolled(recyclerView, dx, dy);
            int[] visibleItems = ((StaggeredGridLayoutManager) gridView.getLayoutManager()).findLastVisibleItemPositions(null);
            int lastitem=0;
            for (int i:visibleItems) {
                lastitem = Math.max(lastitem,i);
            }
            if (lastitem>0 && lastitem>adapterMain.data.size()-5 && !isRunning) {
                if (!internetIsOver) {
                    refresh();
                }
            }
        }
    };

    public class DividerItemDecoration extends RecyclerView.ItemDecoration {
    private static final int[] ATTRS = new int[]{
            android.R.attr.listDivider
    };
    private Drawable mDivider;
    private int offset = 0;
    public DividerItemDecoration(Context context) {
        final TypedArray a = context.obtainStyledAttributes(ATTRS);
        mDivider = a.getDrawable(0);
        offset = UtilsScreen.dpToPx(16);
        a.recycle();
    }
    @Override
    public void onDraw(Canvas c, RecyclerView parent) {
        drawVertical(c, parent);
    }
    public void drawVertical(Canvas c, RecyclerView parent) {
        final int left = parent.getPaddingLeft();
        final int right = parent.getWidth() - parent.getPaddingRight();
        final int childCount = parent.getChildCount();
        for (int i = 0; i < childCount; i++) {
            final View child = parent.getChildAt(i);
            final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
                    .getLayoutParams();
            final int top = child.getBottom() + params.bottomMargin;
            final int bottom = top + offset;//mDivider.getIntrinsicHeight();
            mDivider.setBounds(left, top, right, bottom);
            mDivider.draw(c);
        }
    }
    @Override
    public void getItemOffsets(Rect outRect, int itemPosition, RecyclerView parent) {
        outRect.set(0, 0, 0, offset);//mDivider.getIntrinsicHeight());
    }
    }

              //---

    public static boolean isTablet(Context context) {
        boolean xlarge = ((context.getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == 4);
        boolean large = ((context.getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_LARGE);
        return (xlarge || large);
    }
    public static int getDisplayColumns(Activity activity) {
        int columnCount = 1;
        if (isTablet(activity)) {
            columnCount = 2;
        }
        return columnCount;
    }

     mLayoutManager = new StaggeredGridLayoutManager(UtilsScreen.getDisplayColumns(getActivity()),StaggeredGridLayoutManager.VERTICAL);

• After we posted the application on the side, on some devices (for some reason on the nexus) and for some reason including 4.4.4 - the application began to fall in a strange way in the support librari area (and on our phones (including the nexus) everything worked). I had to disable proguard, it helped but the sediment remained.
• We didn’t really like the font color in the default light theme. It is very tender, considering that the color rendition is different on all android devices, therefore we decided to turn off the font color a little darker.
• You can now disable the shadow on an action bar, for example, like this: getSupportActionBar (). SetElevation (0);
• The application will not work on beta Lollipop in the same way that all other applications in Lollipop design do not work on it (gmail, press)
• The action bar icons have become smaller. We just moved them to the folder (xxhdpi)
• So far we decided to score on the animation. Before the eyes of the Google press and everything seems to spin wildly / spinning / swims / blinks beautifully, but we are not yet ready for such a decisive animation.