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// Create a new ad view.
adView = new AdManagerAdView(this);
adView.setAdUnitId(AD_UNIT);
adView.setAdSize(getAdSize());

// Replace ad container with new ad view.
adContainerView.removeAllViews();
adContainerView.addView(adView);
MyActivity.java

// Create a new ad view.
val adView = AdManagerAdView(this)
adView.adUnitId = AD_UNIT_ID
adView.setAdSize(adSize)
this.adView = adView

// Replace ad container with new ad view.
binding.adViewContainer.removeAllViews()
binding.adViewContainer.addView(adView)
MyActivity.kt

// Start loading the ad in the background.
AdManagerAdRequest adRequest = new AdManagerAdRequest.Builder().build();
adView.loadAd(adRequest);
MyActivity.java

// Start loading the ad in the background.
val adRequest = AdManagerAdRequest.Builder().build()
adView.loadAd(adRequest)
MyActivity.kt

adView.setAdListener(new AdListener() {
    @Override
    public void onAdClicked() {
      // Code to be executed when the user clicks on an ad.
    }

    @Override
    public void onAdClosed() {
      // Code to be executed when the user is about to return
      // to the app after tapping on an ad.
    }

    @Override
    public void onAdFailedToLoad(LoadAdError adError) {
      // Code to be executed when an ad request fails.
    }

    @Override
    public void onAdImpression() {
      // Code to be executed when an impression is recorded
      // for an ad.
    }

    @Override
    public void onAdLoaded() {
      // Code to be executed when an ad finishes loading.
    }

    @Override
    public void onAdOpened() {
      // Code to be executed when an ad opens an overlay that
      // covers the screen.
    }
});

adView.adListener = object: AdListener() {
    override fun onAdClicked() {
      // Code to be executed when the user clicks on an ad.
    }

    override fun onAdClosed() {
      // Code to be executed when the user is about to return
      // to the app after tapping on an ad.
    }

    override fun onAdFailedToLoad(adError : LoadAdError) {
      // Code to be executed when an ad request fails.
    }

    override fun onAdImpression() {
      // Code to be executed when an impression is recorded
      // for an ad.
    }

    override fun onAdLoaded() {
      // Code to be executed when an ad finishes loading.
    }

    override fun onAdOpened() {
      // Code to be executed when an ad opens an overlay that
      // covers the screen.
    }
}

AdManagerAdRequest adRequest = new AdManagerAdRequest.Builder()
    .setManualImpressionsEnabled(true)
    .build();

val adRequest = AdManagerAdRequest.Builder()
    .setManualImpressionsEnabled(true)
    .build()

{ ad_view }.recordManualImpression();

AdManagerAdView.recordManualImpression()

public interface AppEventListener {
  void onAppEvent(String name, String info);
}

interface AppEventListener {
    fun onAppEvent(name: String, info: String)
}

import com.google.android.gms.ads.admanager.*;

public class BannerExample extends Activity implements AppEventListener {
}

import com.google.android.gms.ads.admanager.*

class BannerExample : Activity(), AppEventListener {
}

AdManagerAdView.setAppEventListener(this);

AdManagerAdView.appEventListener = this

@Override
public void onAppEvent(String name, String info) {
  if ("color".equals(name)) {
    if ("green".equals(info)) {
      // Set background color to green.
    } else if ("blue".equals(info)) {
      // Set background color to blue.
    } else {
      // Set background color to black.
    }
  }
}

override fun onAppEvent(name: String?, info: String?) {
    if (name == "color") {
        when (info) {
            "green" -> {
                // Set background color to green.
            }
            "blue" -> {
                // Set background color to blue.
            }
            else -> {
                // Set background color to black.
            }
        }
    }
}