Unresolved reference: FLAG_MUTABLE

[77251380]

I update from 0.3.0 to 0.4.0 ,there is a issue when building Unresolved reference: S Unresolved reference: FLAG_MUTABLE

[Sunbreak]

Could you post flutter doctor -v?

[77251380]

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[√] Flutter (Channel stable, 2.10.4, on Microsoft Windows [Version 10.0.22000.739], locale zh-CN)
    • Flutter version 2.10.4 at D:\work\flutter2_10_4\flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision c860cba910 (3 months ago), 2022-03-25 00:23:12 -0500
    • Engine revision 57d3bac3dd
    • Dart version 2.16.2
    • DevTools version 2.9.2
    • Pub download mirror https://pub.flutter-io.cn
    • Flutter download mirror https://storage.flutter-io.cn

[√] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
    • Android SDK at C:\Users\mrz\AppData\Local\Android\sdk
    • Platform android-32, build-tools 30.0.3
    • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 11.0.12+7-b1504.28-7817840)
    • All Android licenses accepted.

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

[√] Visual Studio - develop for Windows (Visual Studio Community 2019 16.9.5)
    • Visual Studio at C:\Program Files (x86)\Microsoft Visual Studio\2019\Community
    • Visual Studio Community 2019 version 16.9.31229.75
    • Windows 10 SDK version 10.0.19041.0

[√] Android Studio (version 2021.2)
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       https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 11.0.12+7-b1504.28-7817840)

[√] Connected device (4 available)
    • VTR AL00 (mobile) • BNU0217316003151 • android-arm64  • Android 9 (API 28)
    • Windows (desktop) • windows          • windows-x64    • Microsoft Windows [Version 10.0.22000.739]
    • Chrome (web)      • chrome           • web-javascript • Google Chrome 101.0.4951.67
    • Edge (web)        • edge             • web-javascript • Microsoft Edge 103.0.1264.37

[!] HTTP Host Availability
    X HTTP host https://maven.google.com/ is not reachable. Reason: An error occurred while checking the HTTP host: 信号灯超时时间已到

[Sunbreak]

77251380 是 QQ号么，我加您了

[mil-ast]

quick_usb-0.4.0/android/src/main/kotlin/com/example/quick_usb/QuickUsbPlugin.kt: (20, 52): Unresolved reference: S quick_usb-0.4.0/android/src/main/kotlin/com/example/quick_usb/QuickUsbPlugin.kt: (21, 19): Unresolved reference: FLAG_MUTABLE

[AlphaBlend1975]

Same error here when build --release not affected om debug on windows and android

[Sunbreak]

You should update the compileSdkVersion inside your app module youself

40 is an example: compileSdkVersion Math.max(flutter.compileSdkVersion, 31)

[mpekurin]

@Sunbreak the issue is related to Gradle version, it should be not higher than 4.1.x in a project (com.android.tools.build:gradle:4.1.3 in android\build.gradle). Just FYI.

[Sunbreak]

It doesn't make sense. Any doc about the issue?

[mpekurin]

It doesn't make sense. Any doc about the issue?

I haven't found anything 🤷‍♂️

[vorte]

I was also seeing the same error as above. I tried setting the compileSdkVersion and also the build.gradle version but gradle 4.1.x doesn't support Java 17 so the only way I could get this to work was to:

1. Downgrade to java 11
2. Set build.gradle to 4.1.3 and gradle-wrapper.properties to 6.7

The compileSdkVersion didn't seem to do anything for me. For reference I'm running flutter 3.3.4 on Windows 11.

Can we look into supporting newer gradle versions and also jdk 17?