MobileAds.instance.setAppVolume causes a Non-fatal Exception

[victorgoh]

MobileAds.instance.setAppVolume(0.1);

will trigger the following exception:

Non-fatal Exception: io.flutter.plugins.firebase.crashlytics.FlutterError: PlatformException(error, java.lang.Double cannot be cast to java.lang.Float, null, java.lang.ClassCastException: java.lang.Double cannot be cast to java.lang.Float
	at io.flutter.plugins.googlemobileads.GoogleMobileAdsPlugin.onMethodCall(Unknown Source:534)

Plugin Version

0.13.4

Steps to Reproduce

Use the following code in a flutter app

MobileAds.instance.setAppVolume(0.1);

Expected results:
Interstitial Ads volume reduced.

Actual results:
No change in ads volume.

Logs

flutter run --verbose

[  +10 ms] E/MethodChannel#plugins.flutter.io/google_mobile_ads(24393): Failed to handle method call
[        ] E/MethodChannel#plugins.flutter.io/google_mobile_ads(24393): java.lang.ClassCastException: java.lang.Double cannot be cast to
java.lang.Float
[        ] E/MethodChannel#plugins.flutter.io/google_mobile_ads(24393):         at
io.flutter.plugins.googlemobileads.GoogleMobileAdsPlugin.onMethodCall(GoogleMobileAdsPlugin.java:399)
[        ] E/MethodChannel#plugins.flutter.io/google_mobile_ads(24393):         at
io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:233)
[        ] E/MethodChannel#plugins.flutter.io/google_mobile_ads(24393):         at
io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:85)
[        ] E/MethodChannel#plugins.flutter.io/google_mobile_ads(24393):         at
io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:818)
[        ] E/MethodChannel#plugins.flutter.io/google_mobile_ads(24393):         at android.os.MessageQueue.nativePollOnce(Native Method)
[        ] E/MethodChannel#plugins.flutter.io/google_mobile_ads(24393):         at android.os.MessageQueue.next(MessageQueue.java:336)
[        ] E/MethodChannel#plugins.flutter.io/google_mobile_ads(24393):         at android.os.Looper.loop(Looper.java:174)
[        ] E/MethodChannel#plugins.flutter.io/google_mobile_ads(24393):         at android.app.ActivityThread.main(ActivityThread.java:7356)
[        ] E/MethodChannel#plugins.flutter.io/google_mobile_ads(24393):         at java.lang.reflect.Method.invoke(Native Method)
[        ] E/MethodChannel#plugins.flutter.io/google_mobile_ads(24393):         at
com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
[        ] E/MethodChannel#plugins.flutter.io/google_mobile_ads(24393):         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)

flutter doctor -v

[✓] Flutter (Channel stable, 2.2.3, on macOS 11.5.2 20G95 darwin-x64, locale en-US)
    • Flutter version 2.2.3 at /Users/victorgoh/Tools/flutter
    • Framework revision f4abaa0735 (2 months ago), 2021-07-01 12:46:11 -0700
    • Engine revision 241c87ad80
    • Dart version 2.13.4

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
    • Android SDK at /Users/victorgoh/Tools/android-sdk
    • Platform android-30, build-tools 30.0.3
    • ANDROID_HOME = /Users/victorgoh/Tools/android-sdk
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6916264)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 12.5.1, Build version 12E507
    • CocoaPods version 1.10.1

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

[✓] Android Studio (version 4.2)
    • 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 11.0.8+10-b944.6916264)

[✓] VS Code (version 1.60.0)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.26.0

[✓] Connected device (3 available)
    • Android SDK built for x86 (mobile) • emulator-5554 • android-x86    • Android 10 (API 29) (emulator)
    • macOS (desktop)                    • macos         • darwin-x64     • macOS 11.5.2 20G95 darwin-x64
    • Chrome (web)                       • chrome        • web-javascript • Google Chrome 93.0.4577.63

• No issues found!

[maheshj01]

Hi @victorgoh, Thanks for filing the issue. I can replicate the issue on the latest stable 2.5.0 with google_mobile_Ads ads plugin 0.13.4 the volume is not getting changed however muted works. The issue is reproducible on both IOS and Android.

MobileAds.instance.setAppVolume(0.1);  /// does not work

 MobileAds.instance.setAppMuted(true);  // works

flutter doctor -v

[✓] Flutter (Channel stable, 2.5.0, on macOS 11.5.2 20G95 darwin-arm, locale en-GB)
    • Flutter version 2.5.0 at /Users/mahesh/Documents/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 4cc385b4b8 (2 days ago), 2021-09-07 23:01:49 -0700
    • Engine revision f0826da7ef
    • Dart version 2.14.0

[✓] Android toolchain - develop for Android devices (Android SDK version 31.0.0)
    • Android SDK at /Users/mahesh/Library/Android/sdk
    • Platform android-31, build-tools 31.0.0
    • ANDROID_HOME = /Users/mahesh/Library/Android/sdk
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6916264)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 12.5.1, Build version 12E507
    • CocoaPods version 1.10.2

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

[✓] Android Studio (version 4.2)
    • 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 11.0.8+10-b944.6916264)

[✓] IntelliJ IDEA Community Edition (version 2021.2.1)
    • IntelliJ at /Applications/IntelliJ IDEA CE.app
    • Flutter plugin version 60.1.4
    • Dart plugin version 212.5080.8

[✓] VS Code (version 1.59.1)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.26.0

[✓] Connected device (3 available)
    • iPhone 12 Pro (mobile) • B622CBB7-F906-4FA7-8F49-FACEAAC905AB • ios            • com.apple.CoreSimulator.SimRuntime.iOS-14-5 (simulator)
    • macOS (desktop)        • macos                                • darwin-arm64   • macOS 11.5.2 20G95 darwin-arm
    • Chrome (web)           • chrome                               • web-javascript • Google Chrome 93.0.4577.63

• No issues found!