title: WebView overlaps toolbar
body: <p>I'm creating an application and I encountered some problem with my toolbar and webview. My webview overlaps my toolbar on top. How can I fix this?</p>
  
  <p>Here is my sample screenshot:</p>
  
  <p>activity_main:<br>
  <a href="https://i.stack.imgur.com/WgJUZ.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/WgJUZ.jpg" alt="activity_main"></a></p>
  
  <pre><code>&lt;android.support.constraint.ConstraintLayout
      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:background="#ececec"
      tools:context=".MainActivity"&gt;
  
  
  &lt;LinearLayout
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:orientation="vertical"&gt;
  
      &lt;android.support.design.widget.AppBarLayout
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:fitsSystemWindows="true"&gt;
  
          &lt;include
              android:id="@+id/toolbar"
              layout="@layout/toolbar_top" /&gt;
  
          &lt;include
              android:id="@+id/toolbar2"
              layout="@layout/toolbar_bot" /&gt;
  
      &lt;/android.support.design.widget.AppBarLayout&gt;
  
  &lt;/LinearLayout&gt;
  
    &lt;android.support.v4.widget.NestedScrollView
      xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:layout_gravity="fill_vertical"
      app:layout_behaviour="@string/appbar_scrolling_view_behaviour"&gt;
  
      &lt;!--STARTWEBVIEW --&gt;
          &lt;WebView
              android:id="@+id/webview"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:visibility="visible"/&gt;
      &lt;!--ENDWEBVIEW--&gt;
  
    &lt;/android.support.v4.widget.NestedScrollView&gt;
  
  &lt;/android.support.constraint.ConstraintLayout&gt;
  </code></pre>
  
  <p>can you paste the code of toolbar_top and toolbar_bot</p>