设置LinearLayoutManager间距
1、继承RecyclerView.ItemDecoration，实现getItemOffsets方法
public class LinearSpacingItemDecoration extends {
private int spacing;//间距padding
public LinearSpacingItemDecoration(Context context, int spacings) {
//获取需要设置的间距值dp，这里不写死，调用时传过来
// spacing = ().getDimensionPixelSize(.d10);
spacing = spacings;
}
@Override
public void getItemOffsets(@NonNull Rect outRect, @NonNull View view, @NonNull RecyclerView parent, @NonNull state) {
(outRect, view, parent, state);
// = spacing;//item上边的间距
// = spacing;//左边间距
// = spacing;//右边间距
= spacing;//设置bottom padding
}
}
2、然后在设置adapter之前添加上：
(new LinearSpacingItemDecoration(spacings));
设置GridLayoutManager间距（网格布局）：
1、和上边设置一样，继承，实现getItemOffsets方法
public class GridSpacingItemDecoration extends {
private int spanCount; //列数
private int spacing; //间隔
private boolean isIncludeEdge; //是否有边缘
public GridSpacingItemDecoration(int spanCount, int spacing, boolean isIncludeEdge) {
= spanCount;
= spacing;
= isIncludeEdge;
}
@Override
public void getItemOffsets(Rect outRect, View view, RecyclerView parent, state) {
//判断你有几列，设置item
int position = (view); // item position
int column = position % spanCount; // item column
if (isIncludeEdge) {
= spacing - column * spacing / spanCount; // spacing - column * ((1f / spanCount) * spacing)
= (column + 1) * spacing / spanCount; // (column + 1) * ((1f / spanCount) * spacing)
if (position < spanCount) { // top edge
= spacing;
}
= spacing; // item bottom
} else {
= column * spacing / spanCount; // column * ((1f / spanCount) * spacing)
= spacing - (column + 1) * spacing / spanCount; // spacing - (column + 1) * ((1f / spanCount) * spacing)
if (position >= spanCount) {
= spacing; // item top
}
}
}
}
2、调用：
(new GridSpacingItemDecoration(Count, spacing, isIncludeEdge));
即可。