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AdMob

AdMob Flutter (Android) guide for Custom Adapter (GMA Next-Gen SDK).

Prerequisites

Performed by: Developer

Install the SDK

Performed by: Developer

Ensure your android/build.gradle (project-level) includes the required repositories:

allprojects {
    repositories {
        google()
        mavenCentral()
        maven { url 'https://jitpack.io' }
    }
}

Note: On Gradle 7+, use Gradle Setup (Gradle 7+) instead - declare repositories in settings.gradle under dependencyResolutionManagement and remove the allprojects block. Use one approach, not both.

Android

Open the pubspec.yaml file.

Find the dependencies block and add:

dependencies:
  tapmind_ads_admob_nextgen_flutter: ^1.0.1
  google_mobile_ads: ^9.1.0

Note: To use GMA Next-Gen on Android, build with flutter run --dart-define USE_NEXT_GEN_SDK=true. See Google's Install GMA Next-Gen SDK.

Configure AdMob

Performed by: Ad ops

Create the custom event (waterfall): Mediation → Create mediation group → select Android and ad format → name it (provided by your account manager) → Add ad units → select your app and ad units.

Add the ad source: Waterfall source → Set up ad source → Custom event → select your app/platform → select the ad unit, then enter:

Mapping name : provided by your account manager
eCPM         : provided by your account manager
Class        : com.tapmind.mediation.ng.TapMindAdmobAdapter
Parameter    : {"placementName": "provided by your account manager"}

The placementName value is case-sensitive and must exactly match the Placement Name configured in the TapMind Dashboard.

Note: Official Google documentation: Create a custom event

Verify integration

Performed by: Developer

After install and dashboard configuration:

  1. Run your app in a debug build. TapMind's test mode is enabled automatically in debug builds and serves test ads at a high fill rate.
  2. Request an ad through your mediation SDK as you normally would.
  3. Confirm a TapMind ad fills. Check logs for the tag TapMindAdapter.
  4. When verified, build in release mode for production - test mode is disabled automatically in release builds, and live ads serve.

Note: Test mode is automatic. It follows your build type: debug = test ads, release = live ads. There is no flag to enable or disable, and nothing to turn off before going live.

Release build QA: There is currently no documented release-safe test path to validate R8/ProGuard without serving live ads. Consumer ProGuard rules from the TapMind AAR are applied automatically when you integrate the published adapter packages.

Troubleshooting

Performed by: Developer

Before diving into logs, confirm adapter class names and the LevelPlay network key against the Class & Network Key Registry, and placementName and eCPM/rate with your account manager.

See Troubleshooting for common symptoms, mediation-specific fixes, release vs debug guidance, and escalation steps. Partner-specific verification steps are under Verify integration above.

Note: Mediation dashboards may report higher request or attempt counts for TapMind's line than TapMind's backend actually receives. This is expected mediation-side counting behavior, not an integration issue, see Dashboard vs. backend count discrepancies in Troubleshooting for details.