title: How to remove shadow on scroll RecyclerView
body: <p>I'm trying to implement a <code>RecyclerView</code> with different list items. I don't know why but there is a shadow dropped by list items. This shadow appears when I scroll up and down. I want to get rid of this shadow, but found nothing that could help me. Any suggestions? Here's my XML: </p>
  
  <pre><code>&lt;android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto"
      xmlns:tools="http://schemas.android.com/tools"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:fitsSystemWindows="true"
      tools:context="com.example.admin.lanet_contactwork.activities.LoginActivity"&gt;
  
      &lt;android.support.design.widget.AppBarLayout
          android:layout_width="match_parent"
          android:fitsSystemWindows="true"
          android:layout_height="?attr/actionBarSize"
          android:theme="@style/AppTheme.AppBarOverlay"&gt;
  
          &lt;android.support.v7.widget.Toolbar
              android:id="@+id/toolbar"
              android:layout_width="match_parent"
              android:layout_height="?attr/actionBarSize"
              android:background="?attr/colorPrimary"
              app:popupTheme="@style/AppTheme.PopupOverlay"
              app:layout_scrollFlags="scroll|enterAlways"/&gt;
  
      &lt;/android.support.design.widget.AppBarLayout&gt;
  
      &lt;android.support.v7.widget.RecyclerView
          android:id="@+id/recycler"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          app:layout_behavior="@string/appbar_scrolling_view_behavior"
          /&gt;
  
  
  &lt;/android.support.design.widget.CoordinatorLayout&gt;
  </code></pre>
  
  <p>--------------------------------------<strong>Update: added item layouts-</strong>---------------------------</p>
  
  <p><strong>FIRST ITEM LAYOUT</strong></p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;LinearLayout
      xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_height="wrap_content"
      android:layout_width="match_parent"
      android:orientation="horizontal"
      &gt;
  &lt;TextView
      android:id="@+id/divider_txt"
      android:layout_width="match_parent"
      android:layout_height="48dp"
      android:padding="8dp"
      android:maxLines="1"
      android:textSize="18sp"
      android:background="@color/lightgrey"
      android:textColor="@android:color/black"
      android:textStyle="bold"&gt;
  
  &lt;/TextView&gt;
      &lt;/LinearLayout&gt;
  </code></pre>
  
  <p><strong>SECOND ITEM LAYOUT</strong></p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:id="@+id/task"
      android:layout_width="match_parent"
      android:layout_height="62dp"&gt;
  
      &lt;ImageView
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:id="@+id/task_type_img"
          android:layout_marginRight="5dp"
          android:layout_alignParentRight="true"
          android:layout_alignParentEnd="true"
          android:layout_centerVertical="true"
          android:src="@mipmap/ic_sort_grey" /&gt;
  
      &lt;TextView
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:text="New Text"
          android:id="@+id/address_txt"
          android:layout_alignParentStart="true"
          android:layout_alignParentTop="true"
          android:layout_alignParentLeft="true"
          android:layout_marginLeft="72dp"
          android:textSize="16sp"
          android:textColor="@android:color/black"
          android:layout_marginTop="12dp"
          android:layout_toLeftOf="@+id/task_type_img" /&gt;
  
      &lt;TextView
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:text="10:00"
          android:id="@+id/time_txt"
          android:textSize="16sp"
          android:textColor="@android:color/black"
          android:layout_alignParentStart="true"
          android:layout_alignParentLeft="true"
          android:layout_centerVertical="true"
          android:layout_marginLeft="16dp" /&gt;
  
      &lt;TextView
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:text="New Text"
          android:id="@+id/address_details_txt"
          android:layout_marginLeft="72dp"
          android:layout_alignParentStart="true"
          android:layout_alignParentLeft="true"
          android:layout_alignParentBottom="true"
          android:layout_marginBottom="12dp"
          android:textColor="@android:color/black"
          android:textSize="14sp"
          android:layout_toLeftOf="@+id/task_type_img" /&gt;
  &lt;/RelativeLayout&gt;
  </code></pre>