Android-瀑布流

point1

需要服务器返回图片规格

point2

在adapter的onBindViewHolder中根据服务端返回的图片的规格设置layoutParams

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@Override
public void onBindViewHolder(@NonNull CusHolder holder, int position) {
    BitmapFactory.Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds=true;
    BitmapFactory.decodeResource(mContext.getResources(), mData.get(position).score,options);
    float f=options.outWidth/(float)options.outHeight;
    int h= (int) (650/f);
    RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, h);
    holder.itemView.setLayoutParams(lp);

    // holder.mIv.setImageResource(mData.get(position).score);
    Glide.with(mContext).load(mData.get(position).score).into(holder.mIv);
}

point3

设置rv的manager为StaggeredGridLayoutManager

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mRv.setLayoutManager(new StaggeredGridLayoutManager(2,StaggeredGridLayoutManager.VERTICAL));

point4（不用设置）

  • 来回滑动的时候item交换位置:在设置layoutManager的时候，多加一句代码防止item位置交换 layoutManager.setGapStrategy(StaggeredGridLayoutManager.GAP_HANDLING_NONE);
  • 顶部留空的问题，在onScrollStateChanged里再加一句layoutManager.invalidateSpanAssignments();

参考：https://blog.csdn.net/qq_31390699/article/details/53465671