This guide shows you how to use Google Mobile Ads SDK (Legacy) to load and display ads from maio using [mediation](https://developers.google.com/ad-manager/mobile-ads-sdk/android/mediation.md.txt), covering waterfall integrations. It covers how to add maio to an ad unit's mediation configuration, and how to integrate the maio SDK and adapter into an Android app. The dashboard interface for maio uses Japanese text for its labels, buttons, and descriptions, and the screenshots in this guide have not been translated. In this guide's descriptions and instructions however, labels and buttons are referenced with their English language equivalents. "URL スキーム," for example, is "URL Scheme". ## Supported integrations and ad formats The mediation adapter for maio has the following capabilities: | Integration || |---|---| | Bidding | | | Waterfall | Yes | | Banner | Yes | | Interstitial | Yes | | Rewarded | Yes | | Native | | ## Prerequisites Before you continue, verify the following: - Android API level 24 or later. - maio SDK 1.0.7 or later. - Latest Google Mobile Ads SDK (Legacy) version. - [Set up mediation](https://developers.google.com/ad-manager/mobile-ads-sdk/android/mediation.md.txt). ## Step 1: Set up configurations in maio UI First, [sign up](https://docs.google.com/forms/d/e/1FAIpQLScSrlf8JTwTdvJjaLjc3v4z8PfunngKALSBdRf3EfyctdMY3Q/viewform) or [log in](https://maio.jp/publisher/login) to your maio account. Click the **Application management** button on the left sidebar and click on **New app**. ![](https://developers.google.com/static/admob/images/mediation/maio/new-app.png) Select the tab corresponding to your preferred **Ad Type**. ### Interstitial Enter the **Name** of your app, select the platform and provide your **App URL** . Select **Video interstitial** as the **Ad Type** , and then click **Update**. ![](https://developers.google.com/static/admob/images/mediation/maio/interstitial_Android.png) **Note:** Interstitial ads from maio are skippable by default. ### Rewarded Enter the **Name** of your app, select the platform and provide your **App URL** . Select **Video Rewards** as the **Ad Type** , and then click **Update**. ![](https://developers.google.com/static/admob/images/mediation/maio/rewarded_Android.png) **Note:** Rewarded Video ads from maio are **NOT** skippable by default. In the **Application Management** page, make a note of the **Media ID**. It's needed to set up your Ad Manager ad unit in the next section. ![](https://developers.google.com/static/admob/images/mediation/maio/media_id_Android.png) In the **Zone Management** page, make a note of the **Zone ID**. It will also be needed to set up your Ad Manager ad unit in the next section. ![](https://developers.google.com/static/admob/images/mediation/maio/zone_id_Android.png) In addition to **Media ID** and **Zone ID** , you will need **API ID** and **API KEY** to set up your ad unit ID for mediation. In **Reporting API page** , make a note of **API ID** and **API KEY** .
![](https://developers.google.com/static/admob/images/mediation/maio/api_id_key.png) > [!NOTE] > **Note:** If this is your first time setting up your maio account, you may need to contact maio's support team in order for your **API ID** and **API KEY** to be issued to you. ## Step 2: Set up maio demand in Ad Manager UI ### Configure mediation settings for your ad unit Sign in to your [Ad Manager account](https://admanager.google.com/home/). Navigate to **Delivery \> Yield groups** and click the **New yield group** button. ![](https://developers.google.com/static/admob/images/mediation/gam-create-new-yield-group.png) Enter a unique **Name** for your yield group, set the **Status** to **Active** , select your **Ad Format** , and set the **Inventory type** to **Mobile App** . Under the **Targeting \> Inventory** section, select the ad unit under **Inventory** and **Mobile application** to which you want to add mediation.
Next, click the **Add yield partner** button. ![](https://developers.google.com/static/admob/images/mediation/dfp_yield_partner_add.png) If you already have a **Yield partner** for maio, you can select it. Otherwise, select **Create a new yield partner**. Select **maio** as the **Ad network** , enter a unique **Name** and enable **Mediation**. Turn on **Automatic data collection** , and enter the **API ID** and **API KEY** obtained in the previous section. ![](https://developers.google.com/static/admob/images/mediation/maio/gam-create-company-mediation.png) Once the **Yield partner** is selected, choose **Mobile SDK Mediation** as the **Integration type** , **Android** as the **Platform** , and **Active** as the **Status** . Enter the **Media ID** and **Zone ID** obtained in the previous section. Then, enter a **Default CPM** value. > [!IMPORTANT] > **Important:** The **Media ID** must be associated with the targeted app as in the maio UI. ![](https://developers.google.com/static/admob/images/mediation/maio/gam-add-yield-partner-mediation-Android.png) Click **Save** at the bottom of the page when done. > [!NOTE] > **Note:** Automatic data collection takes a few days to gather data before it can accurately calculate a Dynamic CPM value for a mediation network. Once the eCPM can be calculated, it will be automatically updated on your behalf. ## Step 3: Import the maio SDK and adapter > [!NOTE] > **Note:** Failure to integrate the compatible maio and Google Mobile Ads SDK (Legacy) versions might lead to build issues. ### Android Studio integration (recommended) In your project-level `settings.gradle.kts` file, add the following repositories: ```kotlin dependencyResolutionManagement { repositories { google() mavenCentral() maven { url = uri("https://imobile-maio.github.io/maven") } } } ``` In your app-level gradle file, add the following implementation dependencies: ### Kotlin ```kotlin dependencies { implementation("com.google.android.gms:play-services-ads:25.5.0") implementation("com.google.ads.mediation:maio:2.0.9.1") } ``` ### Groovy ```groovy dependencies { implementation 'com.google.android.gms:play-services-ads:25.5.0' implementation 'com.google.ads.mediation:maio:2.0.9.1' } ``` ### Manual integration - Download the latest version of [maio Android SDK](https://github.com/imobile-maio/maio-Android-SDK/releases) and add it to your project. - Navigate to the [maio adapter artifacts](https://maven.google.com/web/index.html?q=maio#com.google.ads.mediation:maio) on Google's Maven Repository. Select the latest version, download the maio adapter's \`.aar' file, and add it to your project. ## Step 4: Add required code No additional code is required for maio Android integration. ## Step 5: Test your implementation ### Enable test ads Make sure you [register your test device](https://developers.google.com/ad-manager/mobile-ads-sdk/android/test-ads.md.txt#enable_test_devices) for Ad Manager. Publishers using version 11.6.0 or higher of Google Mobile Ads SDK (Legacy) will automatically receive test ads from maio on phones and tablets registered as [test devices](https://developers.google.com/ad-manager/mobile-ads-sdk/android/test-ads.md.txt#add_your_test_device) when making requests. > [!IMPORTANT] > **Important:** Disable test mode for Ad Manager and maio before releasing your app. ### Verify test ads To verify that you are receiving test ads from maio, enable [single ad source testing](https://developers.google.com/ad-manager/mobile-ads-sdk/android/ad-inspector.md.txt#single_ad_source_testing) in ad inspector using the **maio (Waterfall)** ad source(s). ## Error codes If the adapter fails to receive an ad from maio, publishers can check the underlying error from the ad response using [`ResponseInfo.getAdapterResponses()`](https://developers.google.com/ad-manager/mobile-ads-sdk/android/reference/com/google/android/gms/ads/ResponseInfo.md.txt#getAdapterResponses()) under the following classes: | Format | Class name | |---|---| | Interstitial | jp.maio.sdk.android.mediation.admob.adapter.Interstitial | | Rewarded | jp.maio.sdk.android.mediation.admob.adapter.Rewarded | Here are the codes and accompanying messages thrown by the maio adapter when an ad fails to load: | Error code | Reason | |---|---| | 0-10 | maio returned an SDK-specific error. See [code](https://github.com/googleads/googleads-mobile-android-mediation/blob/cd4c87f4e61adcf1bacc69da8c1f69d972105672/ThirdPartyAdapters/maio/maio/src/main/java/com/google/ads/mediation/maio/MaioMediationAdapter.java#L64-L78) and maio's [documentation](https://github.com/imobile-maio/maio-Android-SDK/wiki/API-Reference-(EN)#failnotificationreason-enum-1) for more details. | | 101 | Maio does not have an ad available. | | 102 | Invalid server parameters (e.g. missing Placement ID). | | 103 | Context used to load an ad was not an \`Activity\` instance. | | 104 | The request had age-restricted treatment, but maio SDK cannot receive age-restricted signals | ## maio Android Mediation Adapter Changelog #### Next Version - Updated the adapter to use the `InitializationCompleteCallback.onInitializationFailed(AdError)` API. - Updated the minimum required Android API level to 24. #### Version 2.0.9.1 - Pin the adapter's Kotlin dependency to 1.9.0 (the min Kotlin version supported by GMA NextGen SDK). - Fixed fall-through behavior on age-restricted failure branches during ad initialization and ad load requests. Built and tested with: - Google Mobile Ads SDK version 25.4.0. - Google Mobile Ads Next-Gen SDK version 1.5.0. - Maio SDK version 2.0.9.1. #### Version 2.0.9.0 - Filter age-restricted requests for maio SDK when new `AgeRestrictedTreatment` is set to `CHILD`. - Verified compatibility with maio SDK version 2.0.9. Built and tested with: - Google Mobile Ads SDK version 25.4.0. - Google Mobile Ads Next-Gen SDK version 1.3.1. - Maio SDK version 2.0.9.0. #### Version 2.0.8.2 - Filter age-restricted requests for maio SDK because it cannot receive age-restricted signals. - Added property to build the adapter with GMA Next-Gen SDK dependency. Built and tested with: - Google Mobile Ads SDK version 25.1.0. - Google Mobile Ads Next-Gen SDK version 1.1.0. - Maio SDK version 2.0.8.2. #### Version 2.0.8.1 - Added Banner ad format support Built and tested with: - Google Mobile Ads SDK version 25.0.0. - Maio SDK version 2.0.8.1. #### Version 2.0.8.0 - Verified compatibility with maio SDK version 2.0.8. Built and tested with: - Google Mobile Ads SDK version 24.9.0. - Maio SDK version 2.0.8.0. #### Version 2.0.7.0 - Verified compatibility with maio SDK version 2.0.7. Built and tested with: - Google Mobile Ads SDK version 24.7.0. - Maio SDK version 2.0.7.0. #### Version 2.0.6.0 - Removed class-level references to Context. Can help reduce memory leak issues - Verified compatibility with maio SDK version 2.0.6. Built and tested with: - Google Mobile Ads SDK version 24.6.0. - Maio SDK version 2.0.6.0. #### Version 2.0.5.0 - Verified compatibility with maio SDK version 2.0.5. Built and tested with: - Google Mobile Ads SDK version 24.4.0. - Maio SDK version 2.0.5.0. #### Version 2.0.4.0 - Verified compatibility with maio SDK version 2.0.4. Built and tested with: - Google Mobile Ads SDK version 24.3.0. - Maio SDK version 2.0.4.0. #### Version 2.0.3.1 - Updated the minimum required Android API level to 23. - Updated the minimum required Google Mobile Ads SDK version to 24.0.0. Built and tested with: - Google Mobile Ads SDK version 24.0.0. - Maio SDK version 2.0.3.0. #### Version 2.0.3.0 - Verified compatibility with maio SDK version 2.0.3.0. Built and tested with: - Google Mobile Ads SDK version 23.6.0. - Maio SDK version 2.0.3.0. #### Version 1.1.16.3 - Updated the minimum required Google Mobile Ads SDK version to 23.0.0. - Verified compatibility with maio SDK version 1.1.16. Built and tested with: - Google Mobile Ads SDK version 23.0.0. - Maio SDK version 1.1.16. #### Version 1.1.16.2 - Updated adapter to use new `VersionInfo` class. - Updated the minimum required Google Mobile Ads SDK version to 22.0.0. Built and tested with: - Google Mobile Ads SDK version 22.0.0. - Maio SDK version 1.1.16. #### Version 1.1.16.1 - Updated `compileSdkVersion` and `targetSdkVersion` to API 31. - Updated the minimum required Google Mobile Ads SDK version to 21.0.0. - Updated the minimum required Android API level to 19. Built and tested with: - Google Mobile Ads SDK version 21.0.0. - Maio SDK version 1.1.16. #### Version 1.1.16.0 - Updated error codes to capture additional maio errors. - Verified compatibility with maio SDK version 1.1.16. - Updated the minimum required Google Mobile Ads SDK version to 20.4.0. Built and tested with: - Google Mobile Ads SDK version 20.4.0. - Maio SDK version 1.1.16. #### Version 1.1.15.0 - Verified compatibility with maio SDK version 1.1.15. - Updated the minimum required Google Mobile Ads SDK version to 20.0.0. Built and tested with: - Google Mobile Ads SDK version 20.0.0. - Maio SDK version 1.1.15. #### Version 1.1.14.0 - Added standardized adapter error codes and messages. - Verified compatibility with maio SDK version 1.1.14. - Updated the minimum required Google Mobile Ads SDK version to 19.8.0. Built and tested with: - Google Mobile Ads SDK version 19.8.0. - Maio SDK version 1.1.14. #### Version 1.1.13.0 - Verified compatibility with maio SDK version 1.1.13. - Updated the minimum required Google Mobile Ads SDK version to 19.5.0. Built and tested with: - Google Mobile Ads SDK version 19.5.0. - Maio SDK version 1.1.13. #### Version 1.1.12.0 - Updated the minimum required Google Mobile Ads SDK version to 19.4.0. Built and tested with: - Google Mobile Ads SDK version 19.4.0. - Maio SDK version 1.1.12. #### Version 1.1.11.1 - To limit timouts, ad requests will now immediately fail if maio does not have an ad ready to be shown. - Updated the minimum required Google Mobile Ads SDK version to 19.1.0. Built and tested with: - Google Mobile Ads SDK version 19.1.0. - Maio SDK version 1.1.11. #### Version 1.1.11.0 - Verified compatibility with maio SDK version 1.1.11. - Updated the minimum required Google Mobile Ads SDK version to 18.3.0. Built and tested with: - Google Mobile Ads SDK version 18.3.0. - Maio SDK version 1.1.11. #### Version 1.1.10.0 - Verified compatibility with maio SDK version 1.1.10. - Updated the minimum required Google Mobile Ads SDK version to 18.2.0. #### Version 1.1.8.0 - Verified compatibility with maio SDK version 1.1.8. - Updated the minimum required Google Mobile Ads SDK version to 18.1.0. #### Version 1.1.7.0 - Bug Fixes. - Verified compatibility with maio SDK version 1.1.7. #### Version 1.1.6.1 - Updated adapter to support new Rewarded API. - Updated the minimum required Google Mobile Ads SDK version to 17.2.0. #### Version 1.1.6.0 - Verified compatibility with maio SDK version 1.1.6. #### Version 1.1.5.0 - Verified compatibility with maio SDK version 1.1.5. #### Version 1.1.4.0 - Verified compatibility with maio SDK version 1.1.4. #### Version 1.1.3.1 - Updated the adapter to work with instance class instead of singleton. #### Version 1.1.3.0 - Verified compatibility with maio SDK version 1.1.3. #### Version 1.1.2.1 - Updated the adapter with updated initialize functions. #### Version 1.1.2.0 - Verified compatibility with maio SDK version 1.1.2. #### Version 1.1.1.1 - Updated the adapter to invoke the `onRewardedVideoComplete()` ad event. #### Version 1.1.1.0 - Verified compatibility with maio SDK version 1.1.1. #### Version 1.1.0.0 - Verified compatibility with maio SDK version 1.1.0. #### Version 1.0.8.0 - Verified compatibility with maio SDK version 1.0.8. #### Version 1.0.7.1 - Fixed an issue that could cause NullPointerExceptions to occur when ads fail to load. #### Version 1.0.7.0 - Added ability to enable test mode by adding test device id to `AdRequest`. - Verified compatibility with maio SDK version 1.0.7. #### Version 1.0.6.0 - First release! - Added support for interstitials and rewarded video ads.