Android - AdView missing required XML attribute 'adSize'

Question

My head almost exploded today because the entire day I tried to solve the problem with my AdView from AdMob. I'm getting an error mentioned in the title. I googled through 3 pages but nothing. Same error whatever I do. This is my XML file:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#FFF"
    android:orientation="vertical" >

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="0.48"
        android:src="@drawable/butters10" />

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="42dp" >

        <Button
            android:id="@+id/prev"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_alignParentTop="true"
            android:background="@drawable/prev" />

        <Button
            android:id="@+id/next"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:layout_alignParentTop="true"
            android:background="@drawable/next" />
    </RelativeLayout>

    <com.google.ads.AdView
        xmlns:ads="http://schemas.android.com/apk/libs/com.google.ads"
        android:id="@+id/adView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        ads:loadAdOnCreate="true"
        app:adSize="BANNER"
        app:adUnitId="------------------------------" >
    </com.google.ads.AdView>

</LinearLayout>

I tried to change the app keyword to ads but the problem still shows up.

Another thing is I actually want to add the same ad this the same unit-id to more than one activity. I added this exactly code to my first activity xml file, and everything works fine, but in the second activity it doesn't work at all. Thank you for any help.

Answer 1

To make it work with Google Play services use:

xmlns:ads="http://schemas.android.com/apk/res-auto"

in your XML file.