Android(安卓)recyclerview 支持网格布局的间隙平均分割

GridSpacingItemDecoration

public class GridSpacingItemDecoration extends RecyclerView.ItemDecoration {    private int spanCount;    private int spacing;    private boolean includeEdge;    public GridSpacingItemDecoration(int spanCount, int spacing, boolean includeEdge) {        this.spanCount = spanCount;        this.spacing = spacing;        this.includeEdge = includeEdge;    }    @Override    public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {        int position = parent.getChildAdapterPosition(view);        int column = position % spanCount;        if (includeEdge) {            outRect.left = spacing - column * spacing / spanCount;            outRect.right = (column + 1) * spacing / spanCount;            if (position < spanCount) {                outRect.top = spacing;            }            outRect.bottom = spacing;        } else {            outRect.left = column * spacing / spanCount;            outRect.right = spacing - (column + 1) * spacing / spanCount;//            if (position >= spanCount) {//                outRect.top = spacing;//            }            if (position < spanCount) {                outRect.top = spacing;            }            outRect.bottom = spacing;        }    }}

在初始化RecyclerView时这样用

recyclerview.addItemDecoration(new GridSpacingItemDecoration(2, 30, true));recyclerview.setHasFixedSize(true);

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