title: Android: I cannot remove elevation / shadow on my toolbar
body: <p>Hi i would like to remove the elevation and shadow effect from my toolbar for API 21 and greater. Below is what i have tried</p>
  
  <pre><code>setSupportActionBar(mToolbar);
          getSupportActionBar().setDisplayShowTitleEnabled(false);
          getSupportActionBar().setElevation(0);
  </code></pre>
  
  <p>My Toolbar in XML. I have tried to set elevation to 0dp</p>
  
  <pre><code>&lt;android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto"
      android:id="@+id/toolbar"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:background="@color/colorPrimary"
      android:minHeight="?attr/actionBarSize"
      android:elevation="0dp"
      android:theme="@style/ToolbarStyle"
      app:theme="@style/ToolbarStyle"
      &gt;
  </code></pre>
  
  <p>And this is ToolbarStyle if it helps</p>
  
  <pre><code>&lt;style name="ToolbarStyle" parent="ThemeOverlay.AppCompat.Dark"&gt;
      &lt;item name="colorControlNormal"&gt;@android:color/white&lt;/item&gt;
  &lt;/style&gt;
  </code></pre>
  
  <p><strong>Edit 1: Tried the following in styles v21. Still same result</strong></p>
  
  <pre><code>&lt;style name="ToolbarStyle" parent="ThemeOverlay.AppCompat.Dark"&gt;
      &lt;item name="colorControlNormal"&gt;@android:color/white&lt;/item&gt;
      &lt;item name="android:elevation"&gt;0dp&lt;/item&gt;
  &lt;/style&gt;
  </code></pre>
  
  <p><strong>Edit 2: Where the toolbar is in my layout</strong></p>
  
  <pre><code>android.support.v4.widget.DrawerLayout 
  
      xmlns:android="http://schemas.android.com/apk/res/android"
          xmlns:app="http://schemas.android.com/apk/res-auto"
          android:id="@+id/drawer_layout"
          android:layout_width="match_parent"
          android:layout_height="match_parent"&gt;
  
          &lt;android.support.design.widget.CoordinatorLayout
              android:layout_width="match_parent"
              android:layout_height="match_parent"&gt;
  
              &lt;android.support.design.widget.AppBarLayout
                  android:id="@+id/appBarLayout"
                  android:layout_width="match_parent"
                  android:layout_height="wrap_content"&gt;
  
                  &lt;include layout="@layout/toolbar" /&gt;
  </code></pre>