App crashes on some devices after ad shows

Plugin Version

1.0.1

Steps to Reproduce

App crashes on InterstitialAd and BannerAd on some devices - in my case Motorola Moto G4 v.7 & Motorola Moto X Play v.7.1.1, on most devices it works properly. Probably that’s not only this flutter package’s issue as I found that Moto G4 crashes after ad shows in apps using googleads-mobile-unity (https://github.com/googleads/googleads-mobile-unity/issues/1171)

Logs

11:36:07 E AndroidRuntime : FATAL EXCEPTION: main
11:36:07 E AndroidRuntime : Process: com.flutter.watracker_stage_dm, PID: 10884
11:36:07 E AndroidRuntime : java.lang.LinkageError: Method java.lang.Object com.google.android.gms.internal.ads.jo3.zzb() overrides final method in class Lcom/google/android/gms/internal/ads/bo3; (declaration of 'com.google.android.gms.internal.ads.jo3' appears in /data/app/com.flutter.watracker_stage_dm-1/base.apk)
11:36:07 E AndroidRuntime : at com.google.android.gms.internal.ads.ev0.<init>()
11:36:07 E AndroidRuntime : at com.google.android.gms.internal.ads.dv0.zza()
11:36:07 E AndroidRuntime : at com.google.android.gms.internal.ads.kk2.a()
11:36:07 E AndroidRuntime : at com.google.android.gms.internal.ads.e82.q0()
11:36:07 E AndroidRuntime : at com.google.android.gms.internal.ads.e82.i3()
11:36:07 E AndroidRuntime : at com.google.android.gms.internal.ads.a70.i()
11:36:07 E AndroidRuntime : at com.google.android.gms.ads.c0.a.b()
11:36:07 E AndroidRuntime : at io.flutter.plugins.googlemobileads.h.f()
11:36:07 E AndroidRuntime : at io.flutter.plugins.googlemobileads.u.f()
11:36:07 E AndroidRuntime : at io.flutter.plugins.googlemobileads.f0.onMethodCall()
11:36:07 E AndroidRuntime : at g.a.c.a.j$a.a()
11:36:07 E AndroidRuntime : at io.flutter.embedding.engine.f.c.h()
11:36:07 E AndroidRuntime : at io.flutter.embedding.engine.f.c.i()
11:36:07 E AndroidRuntime : at io.flutter.embedding.engine.f.c.j()
11:36:07 E AndroidRuntime : at io.flutter.embedding.engine.f.a.run()
11:36:07 E AndroidRuntime : at android.os.Handler.handleCallback(Handler.java:751)
11:36:07 E AndroidRuntime : at android.os.Handler.dispatchMessage(Handler.java:95)
11:36:07 E AndroidRuntime : at android.os.Looper.loop(Looper.java:154)
11:36:07 E AndroidRuntime : at android.app.ActivityThread.main(ActivityThread.java:6165)
11:36:07 E AndroidRuntime : at java.lang.reflect.Method.invoke(Native Method)
11:36:07 E AndroidRuntime : at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:888)
11:36:07 E AndroidRuntime : at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:778)

flutter doctor -v

[✓] Flutter (Channel stable, 2.8.1, on macOS 11.5.2 20G95 darwin-x64, locale
    en-GB)
    • Flutter version 2.8.1 at /usr/local/Caskroom/flutter/2.5.1/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 77d935af4d (5 weeks ago), 2021-12-16 08:37:33 -0800
    • Engine revision 890a5fca2e
    • Dart version 2.15.1

[✓] Android toolchain - develop for Android devices (Android SDK version 31.0.0)
    • Android SDK at /Users/mac/SDK
    • Platform android-31, build-tools 31.0.0
    • Java binary at: /Applications/Android
      Studio.app/Contents/jre/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 11.0.10+0-b96-7281165)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 13.0)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • CocoaPods version 1.11.2

[✗] Chrome - develop for the web (Cannot find Chrome executable at
    /Applications/Google Chrome.app/Contents/MacOS/Google Chrome)
    ! Cannot find Chrome. Try setting CHROME_EXECUTABLE to a Chrome executable.

[✓] Android Studio (version 2020.3)
    • 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 11.0.10+0-b96-7281165)

[✓] VS Code (version 1.61.2)
    • VS Code at /Users/mac/Downloads/Visual Studio Code.app/Contents
    • Flutter extension version 3.29.0

[✓] Connected device (1 available)
    • Pixel 4a (mobile) • 15051JEC206908 • android-arm64 • Android 12 (API 31)

[Andrushen]

Close as this issue already exists https://github.com/googleads/googleads-mobile-flutter/issues/471

[maheshmnj]

Thanks for the info @Andrushen, But without any logs there’s no way to know the cause of the crash and so this issue won’t be actionable further. Everyone who is facing this issue it would be great if you can share the complete crash logs along with the output of flutter doctor -v.

Thanks