Setup

Custom events let you add waterfall mediation for an ad network that isn't a supported ad network. You do this by implementing a custom event adapter for the ad network you want to integrate.

You can find a full sample custom event project in our GitHub repo.

Prerequisites

Before you can create custom events, you must first integrate one of the following ad format into your app:

Create a custom event in the UI

A custom event must first be created in the AdMob UI. See the instructions in Add a custom event.

You need to supply the following:

Class Name

The fully-qualified name of the class that implements the custom event adapter—for example, com.google.ads.mediation.sample.customevent.SampleCustomEvent. As a best practice, we recommend using a single adapter class for all custom event ad formats.

Label

A unique name defining the ad source.

Parameter

An optional string argument passed to your custom event adapter.

Initialize the adapter

When GMA Next-Gen SDK initializes, initialize() is invoked on all supported third-party adapters and custom events configured for the app within the AdMob UI. Use this method to perform any necessary setup or initialization on the required third-party SDK for your custom event.

Java

package com.google.ads.mediation.sample.customevent;

import com.google.android.gms.ads.mediation.Adapter;
import com.google.android.gms.ads.mediation.InitializationCompleteCallback;
import com.google.android.gms.ads.mediation.MediationConfiguration;

public class SampleAdNetworkCustomEvent extends Adapter {
  private static final String SAMPLE_AD_UNIT_KEY = "parameter";

  @Override
  public void initialize(Context context,
      InitializationCompleteCallback initializationCompleteCallback,
      List<MediationConfiguration> mediationConfigurations) {
    // This is where you will initialize the SDK that this custom
    // event is built for. Upon finishing the SDK initialization,
    // call the completion handler with success.
    initializationCompleteCallback.onInitializationSucceeded();
  }
}

Kotlin

package com.google.ads.mediation.sample.customevent

import com.google.android.gms.ads.mediation.Adapter
import com.google.android.gms.ads.mediation.InitializationCompleteCallback
import com.google.android.gms.ads.mediation.MediationConfiguration

class SampleCustomEvent : Adapter() {
  private val SAMPLE_AD_UNIT_KEY = "parameter"

  override fun initialize(
    context: Context,
    initializationCompleteCallback: InitializationCompleteCallback,
    mediationConfigurations: List<MediationConfiguration>
  ) {
    // This is where you will initialize the SDK that this custom
    // event is built for. Upon finishing the SDK initialization,
    // call the completion handler with success.
    initializationCompleteCallback.onInitializationSucceeded()
  }
}

Report version numbers

All custom events must report to GMA Next-Gen SDK both the version of the custom event adapter itself and the version of the third-party SDK the custom event interfaces with. Versions are reported as VersionInfo objects:

Java

package com.google.ads.mediation.sample.customevent;

public class SampleCustomEvent extends Adapter {

  @Override
  public VersionInfo getVersionInfo() {
    String versionString = new VersionInfo(1, 2, 3);
    String[] splits = versionString.split("\\.");

    if (splits.length >= 4) {
      int major = Integer.parseInt(splits[0]);
      int minor = Integer.parseInt(splits[1]);
      int micro = Integer.parseInt(splits[2]) * 100 + Integer.parseInt(splits[3]);
      return new VersionInfo(major, minor, micro);
    }

    return new VersionInfo(0, 0, 0);
  }

  @Override
  public VersionInfo getSDKVersionInfo() {
    String versionString = SampleAdRequest.getSDKVersion();
    String[] splits = versionString.split("\\.");

    if (splits.length >= 3) {
      int major = Integer.parseInt(splits[0]);
      int minor = Integer.parseInt(splits[1]);
      int micro = Integer.parseInt(splits[2]);
      return new VersionInfo(major, minor, micro);
    }

    return new VersionInfo(0, 0, 0);
  }
}

Kotlin

package com.google.ads.mediation.sample.customevent

class SampleCustomEvent : Adapter() {
  override fun getVersionInfo(): VersionInfo {
    val versionString = VersionInfo(1,2,3).toString()
    val splits: List<String> = versionString.split("\\.")

    if (splits.count() >= 4) {
      val major = splits[0].toInt()
      val minor = splits[1].toInt()
      val micro = (splits[2].toInt() * 100) + splits[3].toInt()
      return VersionInfo(major, minor, micro)
    }

    return VersionInfo(0, 0, 0)
  }

  override fun getSDKVersionInfo(): VersionInfo {
    val versionString = VersionInfo(1,2,3).toString()
    val splits: List<String> = versionString.split("\\.")

    if (splits.count() >= 3) {
      val major = splits[0].toInt()
      val minor = splits[1].toInt()
      val micro = splits[2].toInt()
      return VersionInfo(major, minor, micro)
    }

    return VersionInfo(0, 0, 0)
  }
}

Request ad

To request an ad, refer to the instructions specific to the ad format: