原文鏈接：https://segmentfault.com/a/1190000006858824

LinearLayoutManager spacing

import android.graphics.Rect; import android.support.v7.widget.RecyclerView; import android.view.View;/*** Created by anonymous on 2016/9/9 0009.* <p>* SpacesItemDecoration* <p>* mRecyclerView.addItemDecoration(new SpacesItemDecoration(5));*/ public class SpacesItemDecoration extends RecyclerView.ItemDecoration {private int space;public SpacesItemDecoration(int space) {this.space = space;}@Overridepublic void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {outRect.left = space;outRect.right = space;outRect.bottom = space;// Add top margin only for the first item to avoid double space between itemsif (parent.getChildLayoutPosition(view) == 0) {outRect.top = space;} else {outRect.top = 0;}} }

使用方法很簡單，上面注釋中也已經給出：

mRecyclerView.addItemDecoration(new SpacesItemDecoration(5));

GridLayoutManager or StaggeredGridLayoutManager spacing

import android.graphics.Rect; import android.support.v7.widget.RecyclerView; import android.view.View;/*** Created by anonymous on 2016/9/9 0009.* <p>* GridSpacingItemDecoration* <p>* int spanCount = 3; // 3 columns* int spacing = 50; // 50px* boolean includeEdge = false;* recyclerView.addItemDecoration(new GridSpacingItemDecoration(spanCount, spacing, includeEdge));*/ 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;}@Overridepublic void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {int position = parent.getChildAdapterPosition(view); // item positionint column = position % spanCount; // item columnif (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 edgeoutRect.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}}} }

此處不僅對間距進行了處理，而且對spanCount也進行了處理，使用方法：

int spanCount = 3; // 3 columns int spacing = 50; // 50px boolean includeEdge = false; mRecyclerView.addItemDecoration(new GridSpacingItemDecoration(spanCount, spacing, includeEdge));

總結

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