How to give space between gridview in through java

Question

How do i get perfect aligning between the gridView items, i have added the gridview using java and it\'s base adapter is set in which i added the image and textview.

Xml

Answer 1

Try this,

    recyclerView  = (RecyclerView) findViewById(R.id.recyclerView );
    recyclerView .setLayoutManager(new GridLayoutManager(getActivity(), 2));
    int spanCount = 2; 
    int spacing_left = 10; 
    int spacing_top=15;

    recyclerView.addItemDecoration(new GridSpacingItemDecoration(spanCount, spacing_left, spacing_top));

GridSpacingItemDecoration:

    /* set spacing for grid view */
    public class GridSpacingItemDecoration extends RecyclerView.ItemDecoration {
        final private int spanCount, spacing, spacing_top;
        final private boolean includeEdge;

        public GridSpacingItemDecoration(int spanCount, int spacing_left, int spacing_top) {
            this.spanCount = spanCount;
            this.spacing = spacing_left;
            this.includeEdge = true;
            this.spacing_top = spacing_top;
        }

        @Override
        public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
            int position = parent.getChildAdapterPosition(view); // item phases_position
            int column = position % spanCount; // item column

            if (includeEdge) {
                outRect.left = spacing - column * spacing / spanCount;
                outRect.right = (column + 1) * spacing / spanCount;

                if (position < spanCount) { // top edge
                    outRect.top = spacing_top;
                }
                outRect.bottom = spacing_top; // item bottom
            } else {
                outRect.left = column * spacing / spanCount; 
                outRect.right = spacing - (column + 1) * spacing / spanCount;
                if (position >= spanCount) {
                    outRect.top = spacing_top; // item top
                }
            }
        }
    }