Video Tutorial
First Come to that marked section
Then go to this link
Copy this code
<![CDATA[
implementation 'com.google.android.gms:play-services-ads:17.2.0'
]]>
and paste it to this section
after that,go to here marked section
and check if it is in the same state.
<![CDATA[
allprojects {
repositories {
google()
jcenter()
}
}
]]>
now come to "xml" section
write this code
<![CDATA[
<com.google.android.gms.ads.AdView
xmlns:ads="http://schemas.android.com/apk/res-auto"
android:id="@+id/adView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_alignParentBottom="true"
ads:adSize="BANNER"
ads:adUnitId="ca-app-pub-3940256099942544/6300978111(this is your adunit id)">
</com.google.android.gms.ads.AdView>
]]>
now come to menifest section
write this extra code.
<![CDATA[
<meta-data
android:name="com.google.android.gms.ads.APPLICATION_ID"
android:value="ca-app-pub-3940256099942544~3347511713 (this is your app id)"/>
]]>
now come to java file
write this extra code .there will be error,red underlined some words,u will click on those word ,select that than ,from key board press "Atl+Enter" then select 'import class'
<![CDATA[
MobileAds.initialize(this,
"ca-app-pub-3940256099942544~3347511713[this is your app id]");
mAdView = findViewById(R.id.adView);
AdRequest adRequest = new AdRequest.Builder().build();
mAdView.loadAd(adRequest);
]]>
now its done..!!!
run it to external android device
