Banner ads

Banner ads are rectangular ads that occupy a portion of an app's layout. They stay on screen while users are interacting with the app, either anchored at the top or bottom of the screen or inline with content as the user scrolls. Banner ads can refresh automatically after a certain period of time. See Overview of banner ads for more information.

This guide shows you how to get started with anchored adaptive banner ads, which maximizes performance by optimizing the ad size for each device using an ad width you specify.

Anchored adaptive banner ads are fixed aspect ratio ads rather than the regular fixed size ads. The aspect ratio is similar to 320x50 industry standard. Once you specify the full width available, it will return you an ad with optimal height for that width. The optimal height doesn't change across requests from the same device, and the surrounding views don't need to move when the ad refreshes.

Prerequisites

Always test with test ads

When building and testing your apps, make sure you use test ads rather than live, production ads. Failure to do so can lead to suspension of your account.

The easiest way to load test ads is to use our dedicated test ad unit ID for Android banners:

ca-app-pub-3940256099942544/9214589741

It's been specially configured to return test ads for every request, and you can use it in your own apps while coding, testing, and debugging. Just make sure you replace it with your own ad unit ID before publishing your app.

For more information about how the Mobile Ads SDK's test ads work, see Test Ads.

Add AdView to the layout

The first step toward displaying a banner is to place AdView in the layout for the Activity or Fragment in which you'd like to display it .:

Java

private AdSize getAdSize() {
  // Determine the screen width (less decorations) to use for the ad width.
  Display display = getWindowManager().getDefaultDisplay();
  DisplayMetrics outMetrics = new DisplayMetrics();
  display.getMetrics(outMetrics);

  float density = outMetrics.density;

  float adWidthPixels = adContainerView.getWidth();

  // If the ad hasn't been laid out, default to the full screen width.
  if (adWidthPixels == 0) {
    adWidthPixels = outMetrics.widthPixels;
  }

  int adWidth = (int) (adWidthPixels / density);
  return AdSize.getCurrentOrientationAnchoredAdaptiveBannerAdSize(this, adWidth);
}

private void loadBanner() {
  
  // Create a new ad view.
  AdView adView = new AdView(this);
  adView.setAdSizes(getAdSize());
  adView.setAdUnitId("ca-app-pub-3940256099942544/9214589741");

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

  // Start loading the ad in the background.
  AdRequest adRequest = new AdRequest.Builder().build();
  adView.loadAd(adRequest);
}

Kotlin


// Determine the screen width (less decorations) to use for the ad width.
// If the ad hasn't been laid out, default to the full screen width.
private val adSize: AdSize
  get() {
    val display = windowManager.defaultDisplay
    val outMetrics = DisplayMetrics()
    display.getMetrics(outMetrics)

    val density = outMetrics.density

    var adWidthPixels = binding.adViewContainer.width.toFloat()
    if (adWidthPixels == 0f) {
      adWidthPixels = outMetrics.widthPixels.toFloat()
    }

    val adWidth = (adWidthPixels / density).toInt()
    return AdSize.getCurrentOrientationAnchoredAdaptiveBannerAdSize(this, adWidth)
  }

private fun loadBanner() {
  
  // Create a new ad view.
  val adView = AdView(this)
  adView.adSizes = adSize
  adView.adUnitId = "ca-app-pub-3940256099942544/9214589741"

  // Create an ad request.
  val adRequest = AdRequest.Builder().build()

  // Start loading the ad in the background.
  adView.loadAd(adRequest)
}

Load an ad

Once the AdView is in place, the next step is to load an ad. That's done with the loadAd() method in the AdView class. It takes an AdRequest parameter, which holds runtime information, such as targeting info, about a single ad request.

Here's an example that shows how to load an ad in the onCreate() method of an Activity:

Java

private void loadBanner() {
  // Create a new ad view.
  adView = new AdView(this);
  adView.setAdUnitId(AD_UNIT);
  adView.setAdSize(getAdSize());
  
  // Replace ad container with new ad view.
  adContainerView.removeAllViews();
  adContainerView.addView(adView);

  // Start loading the ad in the background.
  AdRequest adRequest = new AdRequest.Builder().build();
  adView.loadAd(adRequest);
}

Kotlin

private fun loadBanner() {
  // This is an ad unit ID for a test ad. Replace with your own banner ad unit ID.
  adView.adUnitId = "/6499/example/banner"
  adView.setAdSize(adSize)
  
  // Create an ad request.
  val adRequest = AdRequest.Builder().build()

  // Start loading the ad in the background.
  adView.loadAd(adRequest)
}

If your ad fails to load, you don't need to explicitly request another one as long as you've configured your ad unit to refresh; the Google Mobile Ads SDK respects any refresh rate you specified in the AdMob web interface. If you haven't enabled refresh, you will need to issue a new request.

That's it! Your app is now ready to display banner ads.

Ad events

To further customize the behavior of your ad, you can hook onto a number of events in the ad's lifecycle: loading, opening, closing, and so on. You can listen for these events through the AdListener class.

To use an AdListener with AdView, call the setAdListener() method:

Java

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.
    }
});

Kotlin

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.
    }
}

Each of the overridable methods in AdListener corresponds to an event in the lifecycle of an ad.

Overridable methods
onAdClicked() The onAdClicked() method is invoked when a click is recorded for an ad.
onAdClosed() The onAdClosed() method is invoked when a user returns to the app after viewing an ad's destination URL. Your app can use it to resume suspended activities or perform any other work necessary to make itself ready for interaction. Refer to the AdMob AdListener example for an implementation of the ad listener methods in the Android API Demo app.
onAdFailedToLoad() The onAdFailedToLoad() method is the only one that includes a parameter. The error parameter of type LoadAdError describes what error occurred. For more information, refer to the Debugging Ad Load Errors documentation.
onAdImpression() The onAdImpression() method is invoked when an impression is recorded for an ad.
onAdLoaded() The onAdLoaded() method is executed when an ad has finished loading. If you want to delay adding the AdView to your activity or fragment until you're sure an ad will be loaded, for example, you can do so here.
onAdOpened() The onAdOpened() method is invoked when an ad opens an overlay that covers the screen.

Hardware acceleration for video ads

In order for video ads to show successfully in your banner ad views, hardware acceleration must be enabled.

Hardware acceleration is enabled by default, but some apps may choose to disable it. If this applies to your app, we recommend enabling hardware acceleration for Activity classes that use ads.

Enabling hardware acceleration

If your app does not behave properly with hardware acceleration turned on globally, you can control it for individual activities as well. To enable or disable hardware acceleration, you can use the android:hardwareAccelerated attribute for the <application> and <activity> elements in your AndroidManifest.xml. The following example enables hardware acceleration for the entire app but disables it for one activity:

<application android:hardwareAccelerated="true">
    <!-- For activities that use ads, hardwareAcceleration should be true. -->
    <activity android:hardwareAccelerated="true" />
    <!-- For activities that don't use ads, hardwareAcceleration can be false. -->
    <activity android:hardwareAccelerated="false" />
</application>

See the Hardware acceleration guide for more information about options for controlling hardware acceleration. Note that individual ad views cannot be enabled for hardware acceleration if the activity is disabled, so the activity itself must have hardware acceleration enabled.

Additional resources

Examples on GitHub

Mobile Ads Garage video tutorials

Success stories

Next steps

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