1.图片瀑布流现在几乎基本上是app比较常见的图片展示方式，此文简单介绍下RecyclerView + Glide结合实现图片瀑布流的效果的实现方法之一，先上效果：
2.具体实现如下：
// 1.设置LayoutManagerStaggeredGridLayoutManager manager = new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL);manager.setGapStrategy(StaggeredGridLayoutManager.GAP_HANDLING_NONE);recyclerView.setLayoutManager(manager);// 2.添加ItemDecoration// 每个item之间的间距int divider = DimenUtil.Dp2Px(8);RecyclerView.ItemDecoration gridItemDecoration = new RecyclerView.ItemDecoration() {@Overridepublic void getItemOffsets(@NonNull Rect outRect, @NonNull View view, RecyclerView parent, @NonNull RecyclerView.State state) {StaggeredGridLayoutManager.LayoutParams layoutParams = (StaggeredGridLayoutManager.LayoutParams) view.getLayoutParams();int spanIndex = layoutParams.getSpanIndex();int position = parent.getChildAdapterPosition(view);outRect.bottom = divider;if (position == 0 || position == 1) {outRect.top = divider * 2;} else {outRect.top = 0;}if (spanIndex % 2 == 0) {//偶数项outRect.left = divider;outRect.right = divider / 2;} else {outRect.left = divider / 2;outRect.right = divider;}}};recyclerView.addItemDecoration(gridItemDecoration);// 3.设置RecyclerView的适配器Adapter，就是一个ImageView，就不详细补充adapter了。// 此处主要写一下Glide加载圆角图片：int radius = 10;// 圆角半径RequestOptions options = new RequestOptions().placeholder(defRes).transform(new CenterCrop(), new GlideRoundTransform(radius)).diskCacheStrategy(DiskCacheStrategy.RESOURCE);Glide.with(context).load(imgResource).transition(DrawableTransitionOptions.withCrossFade()).apply(options).into(imageView);
3.最后注意：瀑布流中的图片高度不一，不是固定的，图片是按照原始宽高比显示，所以图片的width和height最好由服务器接口返回即可（至于图片宽高的值：1.可通过最初的上传接口，告知服务器；2.也可上传到服务器以后，由服务器计算获取其宽高存入数据库）；app拿到宽高设置到imageView即可。
