[Bug]: Alerts are not spoken even with NavigationAudioGuidanceType.alertsAndGuidance

[IvelinKrastev]

Is there an existing issue for this?

• I have searched the existing issues

Description of the bug

Despite setting NavigationAudioGuidanceType.alertsAndGuidance to enable both alerts and turn-by-turn guidance, audio alerts are not being spoken during navigation.

Flutter version

Flutter 3.35.2

Package version

0.6.4

Native SDK versions

• I haven't changed the version of the native SDKs

Flutter Doctor Output

[✓] Flutter (Channel stable, 3.35.2, on macOS 15.5 24F74 darwin-arm64, locale en-BG) [670ms]
• Flutter version 3.35.2 on channel stable at /Users/ivelinkrastev/development/flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 05db968908 (3 days ago), 2025-08-25 10:21:35 -0700
• Engine revision a8bfdfc394
• Dart version 3.9.0
• DevTools version 2.48.0
• Feature flags: enable-web, enable-linux-desktop, enable-macos-desktop, enable-windows-desktop, enable-android, enable-ios, cli-animations, enable-lldb-debugging

[✓] Android toolchain - develop for Android devices (Android SDK version 36.0.0) [3.0s]
• Android SDK at /Users/ivelinkrastev/Library/Android/sdk
• Emulator version 36.1.9.0 (build_id 13823996) (CL:N/A)
• Platform android-36, build-tools 36.0.0
• Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
This is the JDK bundled with the latest Android Studio installation on this machine.
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• Java version OpenJDK Runtime Environment (build 21.0.6+-13391695-b895.109)
• All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 16.4) [1,845ms]
• Xcode at /Applications/Xcode.app/Contents/Developer
• Build 16F6
• CocoaPods version 1.16.2

[✓] Chrome - develop for the web [9ms]
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2025.1) [8ms]
• Android Studio at /Applications/Android Studio.app/Contents
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• Dart plugin can be installed from:
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• Java version OpenJDK Runtime Environment (build 21.0.6+-13391695-b895.109)

[✓] VS Code (version 1.99.3) [7ms]
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension can be installed from:
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[✓] Connected device (3 available) [7.8s]
• sdk gphone64 arm64 (mobile) • emulator-5554 • android-arm64 • Android 16 (API 36) (emulator)
• macOS (desktop) • macos • darwin-arm64 • macOS 15.5 24F74 darwin-arm64
• Chrome (web) • chrome • web-javascript • Google Chrome 139.0.7258.154

[✓] Network resources [882ms]
• All expected network resources are available.

• No issues found!

Steps to reproduce

1. Initialize navigation with NavigationAudioGuidanceType.alertsAndGuidance.
2. Start navigation on a route with known alerts (e.g., traffic incidents, police, etc.).
3. Observe that no audio alerts are spoken, even though visual alerts are present.

Expected vs Actual Behavior

Expected Behavior: Audio alerts should be spoken when NavigationAudioGuidanceType.alertsAndGuidance is enabled, providing both visual and auditory guidance during navigation.

Actual Behavior: No audio alerts are spoken, despite the appropriate setting being enabled.

Code Sample

GoogleMapsNavigator.setAudioGuidance(
    NavigationAudioGuidanceSettings(
        guidanceType: NavigationAudioGuidanceType.alertsAndGuidance,
        isBluetoothAudioEnabled: true,
        isVibrationEnabled: false,
    ),
);

Additional Context

Guidance audio is working correctly, all turn-by-turn navigation is spoken as expected.

[jokerttu]

Hi @IvelinKrastev,

Does this happen on both Android and iOS platforms?
Could you also test the example application to see if the same issue occurs there?
Also make sure you have all needed permissions set for both platforms.

[IvelinKrastev]

I will test the example app
@jokerttu, is there an easy way to simulate alerts?

I currently experience this behavior on Android since I am heavily testing it.

What permissions should I have for the alerts? The turn-by-turn guidance is spoken out loud correctly, but the alerts are not.

[IvelinKrastev]

@jokerttu I just managed to test the example app. The issue occurs there, with the latest package version (0.6.4) and no changes to the package itself.

I attach an image of what is shown on the screen without any voice alerts.

[jokerttu]

@IvelinKrastev
Thanks for reporting this; we will investigate the issue.
This package is only a wrapper around the native Navigation SDKs for Android and iOS. Setting the audio guidance to either VOICE_ALERTS_AND_GUIDANCE or VOICE_ALERTS_ONLY should enable audio alerts as documented.

[ivisiongatesubscription]

@IvelinKrastev Are you Tested this on Android Real Device sometimes in Emulator we cant listen any voice guidance i also faced this then i tested on Real device so its working

[IvelinKrastev]

Hey @ivisiongatesubscription, yes, I have tested this on a real device: a Samsung Galaxy A55 running Android 15. The issue is the same: alerts, such as Police reports, are shown on the screen but not spoken.