瀑布流失效问题

•  RecycleView瀑布流用Glide加载网络图片会导致瀑布流失效，因为不知道网络加载的图片具体高度是多少；这时候我们可以手动设置图片高度，随机值，这样瀑布流就能正常使用了

@Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        ResultBeanData.ResultBean.HotInfoBean hotInfoBean = datas.get(position);
        //设置项的高度，这个值根据情况设置，后面180是图片高度
        int mHeight = (int) (300+Math.random()*180);
        //获取LayoutParams
        ViewGroup.LayoutParams params = holder.iv_hot.getLayoutParams();
        //将LayoutParams即图片的高度设置为我们上面写的高度
        params.height = mHeight;
        //将这个高度重新赋给图片
        holder.iv_hot.setLayoutParams(params);
        Glide.with(mContext).load(Constants.IMAGE_URL+hotInfoBean.getFigure())
                .into(holder.iv_hot);
        holder.tv_name.setText(hotInfoBean.getName());
        holder.tv_price.setText(hotInfoBean.getCover_price());
    }

解决后效果图 

设置item项之间的间距

• 写一个类
• interval用于设置间距

class StaggeredDividerItemDecoration extends RecyclerView.ItemDecoration {
    private Context context;
    private int interval;

    public StaggeredDividerItemDecoration(Context context, int interval) {
        this.context = context;
        this.interval = interval;
    }

    @Override
    public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
//        int position = parent.getChildAdapterPosition(view);
        StaggeredGridLayoutManager.LayoutParams params = (StaggeredGridLayoutManager.LayoutParams) view.getLayoutParams();
        // 获取item在span中的下标
        int spanIndex = params.getSpanIndex();
        int interval = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
                this.interval, context.getResources().getDisplayMetrics());
        // 中间间隔
        //放弃之前的方法。这里设置让左右一样列表左右切换导致中间距离出现问题
        outRect.left = interval/2;
        outRect.right =interval/2;

        // 下方间隔
        outRect.bottom = interval;
    }



}

• 调用，这样就设置了每个项的左右间距13，上面间距13

• recyclerView.addItemDecoration(new StaggeredDividerItemDecoration(mContext,13));