Admob bannner ads not taking full width

Question

Neither test nor live ads are taking full width of the device when using Admob banner ads.

This is the adView that i've declared in my layout xml:

<com.google.android.gms.ads.AdView
        android:id="@+id/adView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:gravity="bottom"
        ads:adSize="BANNER"
        ads:adUnitId="@string/banner_ad_unit_id"></com.google.android.gms.ads.AdView>

This is what is rendered:

Answer 1

Change

ads:adSize="BANNER"

to

ads:adSize="SMART_BANNER"

Smart Banners are new ad units (as of v6.0.0) that will render screen-wide banner ads on any screen size across different devices in either orientation. Smart Banners help deal with increasing screen fragmentation across different devices by "smartly" detecting the width of the phone in its current orientation, and making the ad view that size.

Read more here

Answer 2

you can use FULL_WIDTH

example ads:adSize="FULL_WIDTHx50"