title: android admob banner will not display
body: <p>I have tried everything (admob tutorials, GitHub clones, youtube tutorials, etc.). It will not show on any device (phone or tablet) nor emulator. If anyone could give me some direction I would be grateful.</p>
  
  <pre><code>&lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:ads="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" android:fitsSystemWindows="true" android:orientation="vertical"&gt; &lt;FrameLayout
      android:layout_width="match_parent"
      android:layout_height="192dp"
      android:background="@drawable/listback1"
      android:alpha="0.8"
      android:orientation="vertical"&gt;
  
      &lt;TextView
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:layout_gravity="bottom"
          android:paddingLeft="16dp"
          android:paddingBottom="5dp"
          android:gravity="right"
          android:textColor="@color/orange"
          style="@style/TextAppearance.AppCompat.Title"
          android:text="Food For Thought"
          android:elegantTextHeight="true"
          /&gt; &lt;/FrameLayout&gt;
  
  &lt;android.support.v7.widget.Toolbar
      xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="match_parent"
      android:layout_height="50dp"
      android:background="@drawable/textsign"
      android:id="@+id/toolbar"
      app:menu="@menu/menu_main"
      android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
      app:title="Choose Your Dining Experiance"/&gt;
  
  &lt;ExpandableListView
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:id="@+id/expandableListView"
      android:layout_alignParentTop="true"
      android:layout_alignParentLeft="true"
      android:layout_alignParentStart="true"
      android:divider="@color/orange"
      android:textColor="#000000"
      android:dividerHeight="1dp"
      android:layout_marginTop="20dp" /&gt;
  
  
  
      &lt;com.google.android.gms.ads.AdView
          android:id="@+id/ad_view"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_centerHorizontal="true"
          android:layout_alignParentBottom="true"
          android:paddingTop="15dp"
          ads:adSize="BANNER"
          android:layout_below="@id/expandableListView"
          android:layout_weight="1"
          ads:adUnitId="@string/banner_ad_unit_id" /&gt;
  
  
      &lt;/LinearLayout&gt;
  </code></pre>
  
  <p><br/>
      Activity</p>
  
  <pre><code>@Override
  protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.expandable_layout);
  
  
  
  AdView mAdView = (AdView) findViewById(R.id.ad_view);
  AdRequest adRequest = new AdRequest.Builder().build();
  mAdView.loadAd(adRequest);}
  </code></pre>
  
  <p>gradle</p>
  
  <pre><code>     compile 'com.google.android.gms:play-services-auth:8.4.0' 
       compile 'com.google.android.gms:play-services-appindexing:8.4.0'   
       compile 'com.google.android.gms:play-services-ads:8.4.0'  
       compile 'com.google.android.gms:play-services-identity:8.4.0'  
       compile 'com.google.android.gms:play-services-gcm:8.4.0'
  </code></pre>
  
  <p>android manifest:</p>
  
  <pre><code>    &lt;activity android:name="com.google.android.gms.ads.AdActivity" 
  
       android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|ui
      Mode|s‌​creenSize|smallestScreenSize" 
      android:theme="@android:style/Theme.Translucent" /&gt; 
  </code></pre>