error: Can't resolve symbol 'AdRequest' and 'AdView'

error: Can't resolve symbol 'AdRequest' and 'AdView'

dependencies {

        .......

        compile 'com.google.firebase:firebase-ads:9.6.0'

    }

apply plugin: 'com.google.gms.google-services'

Verified app-level build.gradle

<string name="banner_ad_unit_id">ca-app-pub-MY_ID</string>

added my ad unit ID to strings.xml

<com.google.android.gms.ads.AdView

        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="@string/banner_ad_unit_id">

    </com.google.android.gms.ads.AdView>

placed my ad to relative layout also added xmlns:ads="http://schemas.android.com/apk/res-auto" to my relativelayout

In MainActivity.java

import com.google.android.gms.ads.AdRequest;

import com.google.android.gms.ads.AdView;

public class MainActivity extends ActionBarActivity {

...

protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);

    MobileAds.initialize(getApplicationContext(), "ca-app-pub-MY_ID");

    AdView mAdView = (AdView) findViewById(R.id.adView);

    AdRequest adRequest = new AdRequest.Builder().build();

    mAdView.loadAd(adRequest);

}

Eventhough, I've imported import com.google.android.gms.ads.AdRequest; import com.google.android.gms.ads.AdView; still getting cannot resolve AdRequest and AdView errors.

I also tried clean project and download gradles again.

ANS :- 2

Go to File > Project Structure> Ads > and enable the check box shown in Admob . click on Okbutton Its worked for me.

ANS :- 3

Change the version number of play-services-ads on your gradle to the same version number on your Ads setting page (File->Project Structure->Ads). By this way my android studio finally resolves