回收器内部滚动视图 - 如何滚动整个内容？

Question

我在Scrollview中有Recyclerview

 <Scrollview
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fillViewport="true">

    <LinearLayout
        android:id="@+id/layoutStaticContent"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

       //Static content.
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="100dp">
           .
           .
        <LinearLayout>

         //Dynamic content(newsfeed)
         <android.support.v7.widget.RecyclerView
            android:id="@+id/recycler_view"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />

    </LinearLayout>
 </ScrollView>

现在，滚动时，layoutStaticContent保持固定在顶部

Answer 1

一种可能的解决方法是只使用带有静态内容的RecyclerView作为您的RecycerView的标题。

那么布局就简单了:

//Dynamic content(newsfeed)
     <android.support.v7.widget.RecyclerView
        android:id="@+id/recycler_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

将有一个list_item_header。静态内容的xml布局：

//Static content.
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="100dp">
   .
   .
<LinearLayout>

您必须更改recyclerview适配器，使其包含:

private static final int TYPE_HEADER = 0;
private static final int TYPE_ITEM = 1;

@Override
public int getItemCount()
{
    int itemCount = super.getItemCount();
    if (mIsHeaderPresent)
    {
        itemCount += 1;
    }
    return itemCount;
}


@Override
public int getItemViewType(int position)
{
    if (mIsHeaderPresent && position == 0)
    {
        return TYPE_HEADER;
    }
    return TYPE_ITEM;
}

@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType)
{
    if (viewType == TYPE_HEADER)
    {
        View itemView = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.list_item_header, parent, false);
        ViewHolderHeader viewHolder = new ViewHolderHeader(itemView);
        return viewHolder;
    } else if (viewType == TYPE_ITEM)
    {
        return getItemViewHolder(parent);
    }

    throw new RuntimeException("there is no type that matches the type " + viewType + " + make sure your using types correctly");
}

@Override
public void onBindViewHolder(RecyclerView.ViewHolder passedViewHolder)
{
    if (mIsHeaderPresent && passedViewHolder instanceof ViewHolderHeader)
    {
        onBindHeaderViewHolder((ViewHolderHeader) passedViewHolder);
    } else
    {
        onBindItemViewHolder(passedViewHolder);
    }
}

Answer 2

将包含静态和动态数据的LinearLayout放在一个NestedScrollView中，它会非常好用。

以下是您需要的代码：

<android.support.v4.widget.NestedScrollView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

<LinearLayout
    android:id="@+id/layoutStaticContent"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

   //Static content.
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="100dp">
       .
       .
    <LinearLayout>

     //Dynamic content(newsfeed)
     <android.support.v7.widget.RecyclerView
        android:id="@+id/recycler_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</LinearLayout>
</android.support.v4.widget.NestedScrollView>

我希望它有帮助！

Answer 3

使用Android.support.v4.widget.嵌套滚动视图，然后在两个布局内部嵌套滚动视图