title: How to use transparency to see recycler view item (from behind of another layout) when scrolling
body: <p>I want to see RecyclerView items when scrolling it from behind of top layout     ( LinearLayout with top id).<br>
  I can see the scroll bar from behind but recyclerview item , no .   </p>
  
  <p>please help. </p>
  
  <p>this is my xml layout :    </p>
  
  <pre><code> &lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;RelativeLayout
    android:layout_height="match_parent"
    android:layout_width="wrap_content"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:background="@android:color/transparent"&gt;
  &lt;LinearLayout
      android:background="@android:color/transparent"
      android:alpha="0.25"
      android:id="@+id/top"
      android:layout_alignParentTop="true"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:orientation="horizontal"
      &gt;
      &lt;Button
          android:background="#80000000"
          android:textColor="@color/material_blue_grey_950"
          android:id="@+id/btn_ketabdonUpdate"
          android:layout_width="0dp"
          android:text="yyyyy"
          android:layout_weight="1"
          android:layout_height="match_parent" /&gt;
      &lt;android.support.v7.widget.AppCompatButton
          android:background="#80000000"
          android:textColor="@color/material_blue_grey_950"
          android:id="@+id/btn_ketabdonFilter"
          android:text="xxxxx"
          android:layout_width="0dp"
          android:layout_weight="1"
          android:layout_height="match_parent" /&gt;
  &lt;/LinearLayout&gt;
   &lt;android.support.v4.widget.SwipeRefreshLayout
      android:layout_alignParentTop="true"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:id="@+id/swipeRefreshLayout"
      &gt;
      &lt;android.support.v7.widget.RecyclerView
          android:paddingTop="50dp"
          android:scrollbars="vertical"
          android:fadeScrollbars="true"
          android:paddingRight="5dp"
          android:verticalScrollbarPosition="left"
          android:scrollbarStyle="outsideInset"
          android:id="@+id/rv_fragment"
          android:layout_height="match_parent"
          android:layout_width="wrap_content"
          /&gt;
   &lt;/android.support.v4.widget.SwipeRefreshLayout&gt;
  
  
  &lt;/RelativeLayout&gt;
  </code></pre>