Not Enough Space to Show Ads On Custom Dialog Android Issue -

i'm having problem showing ads admob on custom dialog. says not enough space show ad, needs 320x50dp , has 294x250dp. i'm using custom dialog such one:

i believe problem in dialog itself, has empty space on left , right size, i'm not sure how solve it. i'm asking type of advice me show ad properly. below xml code adview present: http://pastebin.com/phybjtu1

try code

<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:ads="http://schemas.android.com/apk/res-auto"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="fill_parent"     android:layout_height="match_parent"     tools:context="com.example.kaladont.postgamescreen"     android:gravity="center"      >      <relativelayout          android:layout_width="320dp"         android:minwidth="320dp"         android:layout_height="250dp"         android:paddingbottom="0dp"         android:paddingleft="0dp"         android:paddingright="0dp"         android:paddingtop="0dp"         android:background="@drawable/levelselectorbg"          >          <com.example.classes.fontimagebutton             android:id="@+id/nextlvlbutton"             style="?android:attr/buttonstylesmall"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_alignparentbottom="true"             android:textsize="16sp"             android:layout_centerhorizontal="true"             android:text="next level"             />          <com.example.classes.mytextview             android:id="@+id/notifytv"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_alignparenttop="true"             android:layout_centerhorizontal="true"             android:textsize="55sp"             android:text="congrats!"             android:textappearance="?android:attr/textappearancelarge"             />          <com.example.classes.fontimagebutton             android:id="@+id/mainmenubutton"             style="?android:attr/buttonstylesmall"             android:textsize="16sp"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_alignbaseline="@+id/nextlvlbutton"             android:layout_alignbottom="@+id/nextlvlbutton"             android:layout_alignparentright="true"             android:text="main menu" />          <com.example.classes.mytextview             android:id="@+id/scoretv"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_alignright="@+id/notifytv"             android:layout_centervertical="true"             android:layout_centerhorizontal="true"             android:layout_below="@+id/gamegoaltv"             android:layout_margintop="22dp"             android:textsize="33sp"             android:text="your score is: "             android:textappearance="?android:attr/textappearancemedium"             />          <com.example.classes.mytextview             android:id="@+id/gamegoaltv"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_alignleft="@+id/scoretv"             android:layout_below="@+id/notifytv"             android:layout_margintop="24dp"             android:layout_centerhorizontal="true"             android:textsize="30sp"             android:text=""             android:textappearance="?android:attr/textappearancemedium"             />          <com.example.classes.fontimagebutton             android:id="@+id/restartbutton"             style="?android:attr/buttonstylesmall"             android:textsize="16sp"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_alignbaseline="@+id/nextlvlbutton"             android:layout_alignbottom="@+id/nextlvlbutton"             android:layout_alignparentleft="true"             android:text="restart"             />      </relativelayout>      <com.google.android.gms.ads.adview          android:id="@+id/adview"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         ads:adsize="banner"         ads:adunitid="ca-app-pub-5651680025356127/9525960691 "         />  </linearlayout>