Android 如何隐藏/显示布局以响应滚动

这是我的活动布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:orientation="vertical"
    <include
        layout="@layout/signs"
        android:layout_height="wrap_content"
        android:layout_width="match_parent"/>

    <android.support.v7.widget.RecyclerView
            android:layout_height="match_parent"
            android:layout_width="match_parent"
            android:id="@+id/rv"
            android:clipToPadding="false">
    </android.support.v7.widget.RecyclerView>

</LinearLayout>

---

当然，当我滚动

RecyclerView

的项目列表时，标志布局会保持不变。这就是为什么我的问题是如何使这个布局也被滚动，然后再滚动RecyclerView的列表

因为

RecyclerView

不支持添加类似页眉/页脚的ListView，所以您可以实现如下目的：

private class ViewType {
        public static final int Signs = 1;
        public static final int Normal = 2;
}

然后覆盖

getItemViewType

：

@Override
public int getItemViewType(int position) {

    if(items.get(position).isHeader)
        return ViewType.Signs;
    else
        return ViewType.Normal;

}

最后，覆盖CreateViewHolder上的

：

@Override
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {

    View rowView;

    switch (i)
    {       
        case ViewType.Signs:
            rowView=LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.signs, viewGroup, false);
            break;

        default:
            rowView=LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.normal, viewGroup, false);
            break;
    }
    return new ViewHolder (rowView);
}

我必须创建一个适配器类吗？你是这么说的吗？
@Override
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {

    View rowView;

    switch (i)
    {       
        case ViewType.Signs:
            rowView=LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.signs, viewGroup, false);
            break;

        default:
            rowView=LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.normal, viewGroup, false);
            break;
    }
    return new ViewHolder (rowView);
}