Android : AdMessageCodec.java uses or overrides a deprecated API

[Tom3652]

[REQUIRED] Step 1: Describe your environment

Plugin Version

google_mobile_ads: 5.3.0

[REQUIRED] Step 2: Describe the problem

When building for Android, i see this warning :

Note: /Users/foxtom/.pub-cache/hosted/pub.dev/google_mobile_ads-5.3.0/android/src/main/java/io/flutter/plugins/googlemobileads/AdMessageCodec.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.

Steps to Reproduce

1. Build the app on Android device

Expected results:

The code should not be using deprecated APIs

Actual results:

A warning that the code is using a deprecated API

Logs

Note: /Users/foxtom/.pub-cache/hosted/pub.dev/google_mobile_ads-5.3.0/android/src/main/java/io/flutter/plugins/googlemobileads/AdMessageCodec.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.

[✓] Flutter (Channel stable, 3.27.3, on macOS 15.2 24C101 darwin-x64, locale fr-FR)
    • Flutter version 3.27.3 on channel stable at /Users/foxtom/Desktop/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision c519ee916e (3 days ago), 2025-01-21 10:32:23 -0800
    • Engine revision e672b006cb
    • Dart version 3.6.1
    • DevTools version 2.40.2

[✓] Android toolchain - develop for Android devices (Android SDK version 35.0.0)
    • Android SDK at /Users/foxtom/Library/Android/sdk
    • Platform android-35, build-tools 35.0.0
    • Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 21.0.4+-12422083-b607.1)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 16.2)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 16C5032a
    • CocoaPods version 1.16.2

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2024.2)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 21.0.4+-12422083-b607.1)

[✓] VS Code (version 1.96.4)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension can be installed from:
      🔨 https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter

[✓] Connected device (5 available)
    • moto g 8 power (mobile)   • 192.168.1.23:39709        • android-arm64  • Android 11 (API 30)
    • Now You See Me (mobile)   • 00008020-001204401E78002E • ios            • iOS 18.2.1 22C161
    • macOS (desktop)           • macos                     • darwin-x64     • macOS 15.2 24C101 darwin-x64
    • Chrome (web)              • chrome                    • web-javascript • Google Chrome 131.0.6778.265


[✓] Network resources
    • All expected network resources are available.

• No issues found!

[minhtaama]

I got the same problem when running assembleRelease, but Debug works fine. Downgrading to 5.2.0 fixes the error.