ScrollVIew嵌套RecycleView不显示的问题

解决方法：采用NestedScrollView嵌套RecycleView的方式来处理

eg:

<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:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:padding="@dimen/keyline_1">

    </RelativeLayout>

    <View
        android:id="@+id/separator"
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:background="#e5e5e5" />

    <android.support.v7.widget.RecyclerView
        android:id="@+id/conversation"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

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

2.代码中设置：

recyclerView.setNestedScrollingEnabled(false);
recyclerView.setHasFixedSize(false);

完美解决

外加一个ListView的，虽然很久没用了

/** 
 * 解决ScrollView与ListView的嵌套问题 
 * @author zhy 
 *  
 */  
public class MyListView extends ListView  
{  
  
    public MyListView(Context context, AttributeSet attrs)  
    {  
        super(context, attrs);  
    }  
  
    public MyListView(Context context, AttributeSet attrs, int defStyle)  
    {  
        super(context, attrs, defStyle);  
    }  
  
    public MyListView(Context context)  
    {  
        super(context);  
    }  
  
    @Override  
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)  
    {  
  
        /** 
         * 解决ScrollView与ListView的嵌套问题 
         */  
        int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,  
                MeasureSpec.AT_MOST);  
  
        super.onMeasure(widthMeasureSpec, expandSpec);  
    }  
  
}