Item OffsetDecoration for GridLayoutManager in RecycleView

Item OffsetDecoration

Item OffsetDecoration for GridLayoutManager in RecycleView.Following example will help to give equal space to an item in GridLayout.

Item OffsetDecoration for GridLayoutManager in RecycleView.Following example will help to give equal space to an item in GridLayout.

ItemOffsetDecoration.java

public class ItemOffsetDecoration extends RecyclerView.ItemDecoration { private int mItemOffset; private int spanCount = 2; public ItemOffsetDecoration(int itemOffset) { mItemOffset = itemOffset; } public ItemOffsetDecoration(@NonNull Context context, @DimenRes int itemOffsetId) { this(context.getResources().getDimensionPixelSize(itemOffsetId)); } @Override public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) { super.getItemOffsets(outRect, view, parent, state); int position = parent.getChildLayoutPosition(view); GridLayoutManager manager = (GridLayoutManager) parent.getLayoutManager(); if (position < manager.getSpanCount()) outRect.top = mItemOffset; if (position % 2 != 0) { outRect.right = mItemOffset; } outRect.left = mItemOffset; outRect.bottom = mItemOffset; } }

You can call ItemDecoration like below code.

recyclerView = (RecyclerView) view.findViewById(R.id.recycler_view); GridLayoutManager lLayout = new GridLayoutManager(getActivity(), 2); ItemOffsetDecoration itemDecoration = new ItemOffsetDecoration(mActivity, R.dimen.item_offset); recyclerView.addItemDecoration(itemDecoration); recyclerView.setLayoutManager(lLayout);

dimen.xml

<dimen name="item_offset">5dp</dimen>