android6.0 Scrollview嵌套RecyclerView position始终为0

重写    RecyclerView 的 onMeasure

@Overrideprotected void onMeasure(int widthSpec, int heightSpec) {    int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);    super.onMeasure(widthSpec, expandSpec);}