title: android horizontal recyclerview smooth scroll in vertical nestedscrollview
body: <p>I have a very similar issue just as this.
  <a href="https://stackoverflow.com/questions/34258496/nestedscrollview-and-horizontal-recyclerview-smooth-scrolling">NestedScrollView and Horizontal RecyclerView Smooth Scrolling</a></p>
  
  <pre><code>Vertical NestedScrollView (app:layout_behavior="@string/appbar_scrolling_view_behavior"
  |
  | - Vertical LinearLayout
      |
      | - Vertical LinearLayout
          | - TextView (Title)
          | - Horizontal RecyclerView
      |
      | - Vertical LinearLayout
          | - TextView (Title)
          | - Horizontal RecyclerView
      |
      | - Vertical RecyclerView
  </code></pre>
  
  <p>The Vertical NestedScrollView and the Vertical RecyclerView are just alright, but the two Horizontal RecyclerView scrollers are just horrible. None of the components are custom, and everything come from recyclerview-v7:24.2.1, support-v4:24.2.1, design:24.2.1. </p>
  
  <p>I even tried using the leanback-v17:24.2.1, but no avail.</p>
  
  <p>The Horizontal RecyclerViews are setup with LinearLayoutManager.HORIZONTAL.
  I have tried everything from declaratively (android:nestedScrollingEnabled) and programmatically (setNestedScrollingEnabled) setting to true or false, LayoutFrozen, ScrollingTouchSlop, ItemViewCacheSize, but nothing seems to improve the horizontal scroll experience.</p>
  
  <p>What properties, attributes may be used on the Horizontal RecyclerViews so that the horizontal scrolling is smooth as butter?</p>
  
  <p>minSDKVersion 19, targetSDKVersion 24, compileSDKVersion 24, buildToolsVersion 24.0.2.</p>