android - Getting an Error When adding Ads -


so i'm trying add ads program , can see xml

<com.google.ads.adview     xmlns:ads="http://schemas.android.com/apk/lib/com.google.ads"     android:id="@+id/adview"     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:layout_alignleft="@+id/textview1"     android:layout_alignparentbottom="true"     android:layout_marginbottom="27dp"     ads:loadadoncreate="true"     ads:testdevices="test_emulator, test_device_id"     app:adsize="banner" > </com.google.ads.adview>

i error

error parsing xml: unbound prefix

i searched through stackoverflow , on google solution , told me put 

xmlns:ads="http://schemas.android.com/apk/lib/com.google.ads"

however have i'm not sure why i'm getting error

this how have use adview.

<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android"               xmlns:ads="http://schemas.android.com/apk/lib/com.google.ads"               android:orientation="vertical"               android:layout_width="fill_parent"               android:layout_height="fill_parent">   <com.google.ads.adview android:id="@+id/adview"                          android:layout_width="wrap_content"                          android:layout_height="wrap_content"                          ads:adunitid="my_ad_unit_id"                          ads:adsize="banner"                          ads:testdevices="test_emulator, test_device_id"                          ads:loadadoncreate="true"/> </linearlayout>

you can go through official adview tutorial here.


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