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Google / Android

Google Mobile Ads SDK (Legacy) for Android

25.5.0 vs 25.4.0 · SDK released Sep 17, 2026

minSdk 24, a new abstract callback method, an app-wide R8 rule and Fire TV attestation code in 25.5.0, plus a launch crash under AGP 9 R8 defaults, inherited from earlier 25.x releases, when nothing in the app keeps WorkManager's database constructor.

Core and ads-api AARs, 25.5.0 against 25.4.0, with history back to 25.0.0. Offline builds and a network-cut emulator; no live ad traffic.

First page of the report

Inside the investigation

  • Assessment and what was tested
  • Archive, manifest, dependency and API changes
  • minSdk 24 and the AGP 9 launch crash
  • Callback, R8 rule and custom event changes
  • Plugins, adapters and bundled measurement code
  • Experiments and related SDK changes
  • Integration, dependencies, support and sources

Public highlights

  • minSdk 24 confirmed with a failing build at minSdk 23.
  • AGP 9 R8 release builds crashed at launch when nothing kept WorkManager's database constructor; a keep rule fixed it.
  • New callback method, R8 rule and Fire TV attestation traced in bytecode.

Examined versions: 25.0.0, 25.1.0, 25.2.0, 25.3.0, 25.4.0, 25.5.0.

Edition history

Edition 1 · Sep 29, 2026

Current edition