RecyclerView巢狀到ScrollView經常會出現item不能完全填充的問題，給大家個簡單暴力的方案：重新設定佈局引數

class MyViewHolder extends RecyclerView.ViewHolder{
        private MyViewHolder (View itemView) {
               super(itemView);
               //就這一行搞定
     itemView.setLayoutParams(new RecyclerView.LayoutParams(RecyclerView.LayoutParams.MATCH_PARENT, RecyclerView.LayoutParams.WRAP_CONTENT));
        }
}