title: Android remove space between custom Toolbar and shadow with DrawerLayout
body: <p>i'm using <code>Linearlayout</code> like with android <code>Toolbar</code> and i set custom shadow for that, unfortunately after opening <code>DrawerLayout</code> i have tiny space between custom toolbar and drawer layout and i can not fix this problem</p>
  
  <p><strong>CURRENT PROBLEM:</strong></p>
  
  <p><a href="https://i.stack.imgur.com/CvVoA.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/CvVoA.png" alt="enter image description here"></a></p>
  
  <p><strong>CORRECT VIEW:</strong></p>
  
  <p><a href="https://i.stack.imgur.com/5JXgy.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/5JXgy.png" alt="enter image description here"></a></p>
  
  <p>My custom LinearLayout as an Toolbar with <code>application_toolbar</code> name:</p>
  
  <pre><code>    &lt;?xml version="1.0" encoding="utf-8"?&gt;
      &lt;LinearLayout
          xmlns:android="http://schemas.android.com/apk/res/android"
          xmlns:app="http://schemas.android.com/apk/res-auto"
          android:layout_width="fill_parent"
          android:layout_height="52dp"
          android:background="#eaeaea"
          android:gravity="center"&gt;
  
          &lt;TextView
              android:id="@+id/textView2"
              android:layout_width="0dp"
              android:layout_height="fill_parent"
              android:layout_weight="1" /&gt;
  
          &lt;pishguy.ir.asrebidree.Widgets.TextViewStyle
              android:layout_width="100dp"
              android:layout_height="fill_parent"
              app:fonttype="mjbeirut"
              android:text="@string/app_name"
              android:textSize="20sp"
              android:textColor="#737373"
              android:gravity="right"
              android:layout_marginRight="5dp"
              android:paddingTop="7dp" /&gt;
      &lt;/LinearLayout&gt;
  </code></pre>
  
  <p>Activity main with drawerLayout and custom toolbar:</p>
  
  <pre><code>&lt;LinearLayout 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:id="@+id/root"
      android:layout_width="fill_parent"
      android:layout_height="fill_parent"
      android:orientation="vertical"
      tools:context=".MainActivity"&gt;
  
      &lt;!-- CUSTOM TOOLBAR --&gt;
      &lt;include
          android:id="@+id/toolbar"
          layout="@layout/application_toolbar" /&gt;
  
      &lt;!-- TOOLBAR SHADOW --&gt;
      &lt;View
          android:layout_width="fill_parent"
          android:layout_height="5dp"
          android:background="@drawable/toolbar_dropshadow" /&gt;
  
      &lt;android.support.v4.widget.DrawerLayout
          android:id="@+id/drawer_layout"
          android:layout_width="fill_parent"
          android:layout_height="fill_parent"&gt;
  
          &lt;android.support.v7.widget.RecyclerView
              android:id="@+id/rv_items"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent"
              android:padding="2dp"&gt;
  
          &lt;/android.support.v7.widget.RecyclerView&gt;
          ...
      &lt;/android.support.v4.widget.DrawerLayout&gt;
  
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p>Toolbar shadow:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle"&gt;
      &lt;gradient
          android:startColor="@android:color/transparent"
          android:endColor="#50949494"
          android:angle="90"/&gt;
  &lt;/shape&gt;
  </code></pre>