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lmw

2023-06-16 03972ad1d3ce6ffe0be0395c0a4d5dcb4474031f

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package com.luck.picture.lib.decoration;
 
import android.graphics.Rect;
import android.view.View;
 
import androidx.recyclerview.widget.RecyclerView;
 
/**
 * @author：luck
 * @data：2016/12/27 下午23:50
 * @描述:图片预览
 */
 
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;
            }
            outRect.bottom = spacing;
        }
    }
}