FileType.audio picking not showing, crash due Platform exception invalid_format_type, Can't handle the provided file type

[langhoangal]

Describe the bug
As the title, when call to pick a file, nothing happens, just crash silently.
E/FilePickerDelegate( 1270): Can't find a valid activity to handle the request. Make sure you've a file explorer installed.
I/flutter ( 1270): [MethodChannelFilePicker] Platform exception: PlatformException(invalid_format_type, Can't handle the provided file type., null, null)
I/flutter ( 1270): ----------------FIREBASE CRASHLYTICS----------------
I/flutter ( 1270): PlatformException(invalid_format_type, Can't handle the provided file type., null, null)
I/flutter ( 1270): #0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:653:7)
message_codecs.dart:653
I/flutter ( 1270): #1 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:367:18)
platform_channel.dart:367
I/flutter ( 1270):
I/flutter ( 1270): #2 MethodChannel.invokeListMethod (package:flutter/src/services/platform_channel.dart:553:35)
platform_channel.dart:553
I/flutter ( 1270):
I/flutter ( 1270): #3 FilePickerIO._getPath (package:file_picker/src/file_picker_io.dart:107:33)
file_picker_io.dart:107

This one will throw exception:
FilePickerResult? result = await FilePicker.platform.pickFiles( allowMultiple: false, type: FileType.audio, );

This one works
FilePickerResult? result = await FilePicker.platform.pickFiles( allowMultiple: false, type: FileType.custom, allowedExtensions: ['mp3', 'wav', 'm4a', 'aac', 'ogg'], );

I have Pixel 8 with original rom, cannot be an issue with the file explorer, should be something file the file mime.

Platform

• [ x] Android
• iOS
• Web
• Desktop

Platform OS version
16

Some additional info:

1. using the latest version 10.3.7
2. Already clean & rebuild
3. Search for other issues but not found the solution

[novas1r1]

I can confirm this issue on my Pixel 8a and file_picker (10.2.0 as well as 10.3.7)
"E/FilePickerDelegate(22021): Can't find a valid activity to handle the request. Make sure you've a file explorer installed.
I/flutter (22021): [MethodChannelFilePicker] Platform exception: PlatformException(invalid_format_type, Can't handle the provided file type., null, null)"

I definitely have a file explorer installed. All other file types work.

Here's my flutter doctor ouput.

[√] Flutter (Channel stable, 3.38.4, on Microsoft Windows [Version 10.0.26200.7171], locale de-DE) [295ms]
    • Flutter version 3.38.4 on channel stable at C:\Anwendungen\flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 66dd93f9a2 (3 days ago), 2025-12-03 14:56:10 -0800
    • Engine revision a5cb96369e
    • Dart version 3.10.3
    • DevTools version 2.51.1
    • Feature flags: enable-web, enable-linux-desktop, enable-macos-desktop, enable-windows-desktop, enable-android, enable-ios, cli-animations,
      enable-native-assets, omit-legacy-version-file, enable-lldb-debugging

[√] Windows Version (Windows 11 or higher, 25H2, 2009) [1.522ms]

[√] Android toolchain - develop for Android devices (Android SDK version 36.1.0) [1.739ms]
    • Android SDK at C:\Anwendungen\AndroidSDK
    • Emulator version 36.3.10.0 (build_id 14472402) (CL:N/A)
    • Platform android-36, build-tools 36.1.0
    • ANDROID_HOME = C:\Anwendungen\AndroidSDK
    • Java binary at: C:\Program Files\Android\Android Studio\jbr\bin\java
      This is the JDK bundled with the latest Android Studio installation on this machine.
      To manually set the JDK path, use: `flutter config --jdk-dir="path/to/jdk"`.
    • Java version OpenJDK Runtime Environment (build 21.0.8+-14196175-b1038.72)
    • All Android licenses accepted.

[√] Chrome - develop for the web [74ms]
    • Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe

[√] Visual Studio - develop Windows apps (Visual Studio Community 2022 17.12.4) [73ms]
    • Visual Studio at C:\Program Files\Microsoft Visual Studio\2022\Community
    • Visual Studio Community 2022 version 17.12.35707.178
    • Windows 10 SDK version 10.0.22621.0

[√] Connected device (4 available) [376ms]
    • Pixel 8a (mobile) • 3C251JEKB15306 • android-arm64  • Android 16 (API 36)
    • Windows (desktop) • windows        • windows-x64    • Microsoft Windows [Version 10.0.26200.7171]
    • Chrome (web)      • chrome         • web-javascript • Google Chrome 142.0.7444.176
    • Edge (web)        • edge           • web-javascript • Microsoft Edge 143.0.3650.66

[√] Network resources [299ms]
    • All expected network resources are available.

@langhoangal did you find any solution to this already?

[langhoangal]

@novas1r1
I use the custom file type like bellow for now:

FilePickerResult? result = await FilePicker.platform.pickFiles( allowMultiple: false, type: FileType.custom, allowedExtensions: ['mp3', 'wav', 'm4a', 'aac', 'ogg'], );

[novas1r1]

@langhoangal thanks, it's opening the file explorer but it displays all kinds of files - not only the selected extensions. Does this work for you?

[daniJimen]

@novas1r1 @langhoangal into last version (10.3.8) its working succesfully