FormatException: Invalid number (at character 1)

[walidaguib7]

No description provided.

[eilgug]

Thers's another issue open about this and probably this is going to be fixed. At least you can solve that issue following this solution: https://stackoverflow.com/questions/70580684/flutter-launcher-icons-not-working-unhandled-exception-formatexception-invalid

[mbnoimi]

Thank you @eilgug but this is not a practical solution.

[felipeparente]

I get a same error.

[mgesmundo]

+1

[LahaLuhem]

I have an easy fix:

1. Change Line 308 in Dart Packages/flutter_launcher_icons/android.dart:
   • previous: final String minSdk = line.replaceAll(RegExp(r'[^\d]'), '');
   • change to: final String minSdk = "21";
2. Recompile the packages by running flutter clean, followed by flutter pub get again
3. Run generating procedure again by flutter pub run flutter_launcher_icons:main

It just skips the parsing of the manifest file directly to get the minSDK version line.

[cotwitch]

https://pub.dev/packages/flutter_launcher_icons_maker

[alanrubin]

The last package didn't work as well (Flutter 2.10.5).

The problem is that build.gradle has now a variable instead of a number for minSdkVersion and this package cannot deal with that.

 defaultConfig {
        applicationId "xxx.yyy.zzz"
        minSdkVersion flutter.minSdkVersion // Error here: Expected a number instead of a variable
        targetSdkVersion flutter.targetSdkVersion
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

To make it work locally you can simply replace the flutter.minSdkVersion for a number (21 for example). That will make it work. Not ideal but it works. I don't think you will generate the icons often so it should be fine.

[RatakondalaArun]

fixed in #322