Created
October 9, 2016 08:06
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| public class GridSpacingItemDecoration extends RecyclerView.ItemDecoration { | |
| private int spanCount; | |
| private int spacing; | |
| private boolean includeEdge; | |
| private int headerNum; | |
| private boolean isRtl = TextUtilsCompat.getLayoutDirectionFromLocale(Locale.getDefault()) == ViewCompat.LAYOUT_DIRECTION_RTL; | |
| public GridSpacingItemDecoration(int spanCount, int spacing, boolean includeEdge, int headerNum) { | |
| this.spanCount = spanCount; | |
| this.spacing = spacing; | |
| this.includeEdge = includeEdge; | |
| this.headerNum = headerNum; | |
| } | |
| @Override | |
| public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) { | |
| int position = parent.getChildAdapterPosition(view) - headerNum; // item position | |
| if (position >= 0) { | |
| int column = position % spanCount; // item column | |
| if(isRtl) { | |
| column = spanCount - 1 - column; | |
| } | |
| if (includeEdge) { | |
| outRect.left = spacing - column * spacing / spanCount; // spacing - column * ((1f / spanCount) * spacing) | |
| outRect.right = (column + 1) * spacing / spanCount; // (column + 1) * ((1f / spanCount) * spacing) | |
| if (position < spanCount) { // top edge | |
| outRect.top = spacing; | |
| } | |
| outRect.bottom = spacing; // item bottom | |
| } else { | |
| outRect.left = column * spacing / spanCount; // column * ((1f / spanCount) * spacing) | |
| outRect.right = spacing - (column + 1) * spacing / spanCount; // spacing - (column + 1) * ((1f / spanCount) * spacing) | |
| if (position >= spanCount) { | |
| outRect.top = spacing; // item top | |
| } | |
| } | |
| } else { | |
| outRect.left = 0; | |
| outRect.right = 0; | |
| outRect.top = 0; | |
| outRect.bottom = 0; | |
| } | |
| } | |
| } |
GridSpacingItemDecoration for RecyclerView Decoration
Thank you Bro!!
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copy from http://stackoverflow.com/a/30701422/5279354 and support rtl feature