title: BottomNavigationView is not showing
body: <p>When i add the background item in my theme than the BottomNavigationView is disappear. </p>
  
  <p>@color/primary_red
  @color/primary_red</p>
  
  <p>and bottomnavigationview </p>
  
  <pre><code> &lt;android.support.design.widget.BottomNavigationView
          android:id="@+id/navigation"
          android:layout_width="match_parent"
          android:layout_height="60dp"
          android:layout_gravity="bottom"
          design:menu="@menu/bottom_menu_bar" /&gt;
  </code></pre>
  
  <p>When I remove the background item from the theme then it looks like <a href="https://i.stack.imgur.com/Fm5ui.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Fm5ui.png" alt="enter image description here"></a></p>
  
  <p>there is blank space between the window and bottom bar. And also background text is also appearing in foreground. How to remove that. </p>
  
  <p><strong>edit</strong></p>
  
  <p>activity_main.xml</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;android.support.design.widget.CoordinatorLayout
      xmlns:app="http://schemas.android.com/apk/res-auto"
      xmlns:tools="http://schemas.android.com/tools"
      xmlns:design="http://schemas.android.com/apk/res-auto"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      tools:ignore="RtlHardcoded"
      android:background="@color/primary_background"
      xmlns:android="http://schemas.android.com/apk/res/android"&gt;
  
      &lt;android.support.design.widget.AppBarLayout
          android:scrollbars="none"
          android:id="@+id/main.appbar"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"&gt;
  
          &lt;android.support.design.widget.CollapsingToolbarLayout
              android:id="@+id/main.collapsing"
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              app:layout_scrollFlags="scroll|exitUntilCollapsed|snap"&gt;
  
          //some code_1           
  
          &lt;/android.support.design.widget.CollapsingToolbarLayout&gt;
      &lt;/android.support.design.widget.AppBarLayout&gt;
  
  
      &lt;android.support.v7.widget.Toolbar
          android:visibility="invisible"
          android:id="@+id/main.toolbar"
          android:layout_width="match_parent"
          android:layout_height="?attr/actionBarSize"
          app:layout_anchor="@id/main.framelayout.title"
          app:theme="@style/ThemeOverlay.AppCompat.Dark"
          app:title="Dashboard"&gt;
  
          &lt;LinearLayout
              android:layout_width="wrap_content"
              android:layout_height="match_parent"
              android:orientation="horizontal"
              &gt;
  
              &lt;Space
                  android:layout_width="60dp"
                  android:layout_height="60dp"
                  /&gt;
  
              &lt;TextView
                  android:id="@+id/main.textview.title"
                  android:layout_width="wrap_content"
                  android:layout_height="match_parent"
                  android:layout_marginLeft="8dp"
                  android:gravity="center_vertical"
                  android:text="@string/user_name_demp"
                  android:textColor="@android:color/white"
                  android:textSize="20sp"
                  /&gt;
  
          &lt;/LinearLayout&gt;
      &lt;/android.support.v7.widget.Toolbar&gt;
  
      &lt;ImageView
          android:layout_marginBottom="@dimen/activity_horizontal_margin"
          android:layout_marginStart="@dimen/activity_horizontal_margin"
          android:background="@drawable/circle"
          android:id="@+id/profile_pic"
          android:layout_width="70dp"
          android:layout_height="70dp"
          android:layout_gravity="left"
          app:layout_behavior="profile.AvatarImageBehavior"
          app:finalHeight="32dp"
          app:finalYPosition="2dp"
          app:startHeight="15dp"
          app:startToolbarPosition="10dp"
          app:startXPosition="10dp"/&gt;
  
  
  
      &lt;android.support.design.widget.BottomNavigationView
          android:background="@color/green"
          android:id="@+id/navigation"
          android:layout_width="match_parent"
          android:layout_height="60dp"
          android:layout_gravity="bottom"
          design:menu="@menu/bottom_menu_bar" /&gt;
  
  
  
      &lt;android.support.v4.widget.NestedScrollView
          android:fillViewport="true"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          app:layout_behavior="@string/appbar_scrolling_view_behavior"&gt;
  
          &lt;LinearLayout
              android:orientation="vertical"
              android:layout_width="match_parent"
              android:layout_height="wrap_content"&gt;
  
              &lt;TextView
                  android:layout_marginTop="@dimen/activity_horizontal_margin"
                  android:textStyle="bold"
                  android:textAlignment="center"
                  android:textAppearance="@style/TextAppearance.AppCompat.Medium"
                  android:textColor="@color/primary_text"
                  android:text="@string/health_vitals"
                  android:layout_width="match_parent"
                  android:layout_height="wrap_content" /&gt;
  
  
  
              &lt;LinearLayout
                  android:background="@color/primary_text"
                  android:orientation="horizontal"
                  android:layout_width="match_parent"
                  android:layout_height="wrap_content"&gt;
  
                  &lt;!--First Sub Block--&gt;
                  &lt;LinearLayout
                      android:layout_weight="1"
                      android:layout_marginRight="1sp"
                      android:layout_width="match_parent"
                      android:layout_height="match_parent"&gt;
  
                      &lt;customView.healthVitalBlockDashboard
                          android:id="@+id/bp_block"
                          android:layout_width="match_parent"
                          android:layout_height="match_parent"&gt;
                      &lt;/customView.healthVitalBlockDashboard&gt;
  
                  &lt;/LinearLayout&gt;
  
                  &lt;!--Second Sub Block--&gt;
                  &lt;LinearLayout
                      android:layout_weight="1"
                      android:layout_width="match_parent"
                      android:layout_height="match_parent"&gt;
  
                      &lt;customView.healthVitalBlockDashboard
                          android:id="@+id/bsl_block"
                          android:layout_width="match_parent"
                          android:layout_height="match_parent"&gt;
                      &lt;/customView.healthVitalBlockDashboard&gt;
  
                  &lt;/LinearLayout&gt;
  
              &lt;/LinearLayout&gt;
  
  
  
              &lt;TextView
                  android:paddingTop="@dimen/activity_horizontal_margin"
                  android:layout_marginBottom="1dp"
                  android:gravity="center"
                  android:textColor="@color/primary_text"
                  android:textStyle="bold"
                  android:textAppearance="@style/Base.TextAppearance.AppCompat.Medium"
                  android:text="@string/reminder"
                  android:layout_width="match_parent"
                  android:layout_height="wrap_content" /&gt;
  
              &lt;android.support.v7.widget.RecyclerView
                  android:id="@+id/medicine_list"
                  android:layout_width="match_parent"
                  android:layout_height="wrap_content"&gt;
  
              &lt;/android.support.v7.widget.RecyclerView&gt;
  
              &lt;TextView
                  android:paddingTop="8dp"
                  android:paddingBottom="22dp"
                  android:id="@+id/reminderWarning"
                  android:visibility="gone"
                  android:gravity="center"
                  android:textColor="@color/primary_text"
                  android:textStyle="bold"
                  android:textAppearance="@style/Base.TextAppearance.AppCompat.Small"
                  android:text="@string/reminder_warning"
                  android:layout_width="match_parent"
                  android:layout_height="wrap_content" /&gt;
  
              &lt;TextView
                  android:paddingTop="@dimen/activity_horizontal_margin"
                  android:layout_marginBottom="1dp"
                  android:id="@+id/adherence_text"
                  android:textStyle="bold"
                  android:textAlignment="center"
                  android:textAppearance="@style/TextAppearance.AppCompat.Medium"
                  android:textColor="@color/primary_text"
                  android:text="@string/adherence"
                  android:layout_width="match_parent"
                  android:layout_height="wrap_content" /&gt;
  
              &lt;android.support.v7.widget.RecyclerView
                  android:background="@color/primary_text"
                  android:layout_below="@+id/adherence_text"
                  android:id="@+id/action_with_adherence"
                  android:layout_width="match_parent"
                  android:layout_height="wrap_content"&gt;
  
              &lt;/android.support.v7.widget.RecyclerView&gt;
  
  
              &lt;TextView
                  android:paddingTop="8dp"
                  android:paddingBottom="22dp"
                  android:id="@+id/adherence_warning"
                  android:visibility="gone"
                  android:gravity="center"
                  android:textColor="@color/primary_text"
                  android:textStyle="bold"
                  android:textAppearance="@style/Base.TextAppearance.AppCompat.Small"
                  android:layout_width="match_parent"
                  android:layout_height="wrap_content" /&gt;
  
          &lt;/LinearLayout&gt;
  
      &lt;/android.support.v4.widget.NestedScrollView&gt;
  
  
  &lt;/android.support.design.widget.CoordinatorLayout&gt;
  
  
  
  Any leads will be helpfull!!!
  </code></pre>