升级到 3.0.0 后应用程序无法构建答案

【问题标题】：App does not build after upgrading to 3.0.0升级到 3.0.0 后应用程序无法构建
【发布时间】：2022-06-15 15:13:57
【问题描述】：

在将 Flutter 升级到新的 3.0.0 后，qr_code_scanner 库出现问题

e: /home/kalheeso/snap/flutter/common/flutter/.pub-cache/hosted/pub.dartlang.org/qr_code_scanner-0.7.0/android/src/main/kotlin/net/touchcapture/qr/flutterqr/QRView.kt: (23, 1): Class 'QRView' is not abstract and does not implement abstract member public abstract fun onRequestPermissionsResult(p0: Int, p1: Array<(out) String!>, p2: IntArray): Boolean defined in io.flutter.plugin.common.PluginRegistry.RequestPermissionsResultListener
e: /home/kalheeso/snap/flutter/common/flutter/.pub-cache/hosted/pub.dartlang.org/qr_code_scanner-0.7.0/android/src/main/kotlin/net/touchcapture/qr/flutterqr/QRView.kt: (216, 26): Null can not be a value of a non-null type String
e: /home/kalheeso/snap/flutter/common/flutter/.pub-cache/hosted/pub.dartlang.org/qr_code_scanner-0.7.0/android/src/main/kotlin/net/touchcapture/qr/flutterqr/QRView.kt: (247, 26): Null can not be a value of a non-null type String
e: /home/kalheeso/snap/flutter/common/flutter/.pub-cache/hosted/pub.dartlang.org/qr_code_scanner-0.7.0/android/src/main/kotlin/net/touchcapture/qr/flutterqr/QRView.kt: (310, 5): 'onRequestPermissionsResult' overrides nothing
e: /home/kalheeso/snap/flutter/common/flutter/.pub-cache/hosted/pub.dartlang.org/qr_code_scanner-0.7.0/android/src/main/kotlin/net/touchcapture/qr/flutterqr/QRViewFactory.kt: (10, 1): Class 'QRViewFactory' is not abstract and does not implement abstract base class member public abstract fun create(p0: Context?, p1: Int, p2: Any?): PlatformView defined in io.flutter.plugin.platform.PlatformViewFactory
e: /home/kalheeso/snap/flutter/common/flutter/.pub-cache/hosted/pub.dartlang.org/qr_code_scanner-0.7.0/android/src/main/kotlin/net/touchcapture/qr/flutterqr/QRViewFactory.kt: (13, 5): 'create' overrides nothing

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':qr_code_scanner:compileDebugKotlin'.
> Compilation error. See log for more details

【问题讨论】：

标签： android flutter flutter-dependencies

【解决方案1】：

使用替代mobile_scanner。这个库在 Flutter 3.0 中不起作用。要不然如果你想使用 qr_code_scanner 库，那不是官方的 creator repo，但你可以使用它。

dependency_overrides:
    qr_code_scanner:
        git:
            url: https://github.com/X-SLAYER/qr_code_scanner.git
            ref: flutter-beta

【讨论】：

谢谢。你认为他们很快就会增加对 3.0 版本的支持吗？上一个版本发布已经 3 个月了，但它仍然是 pub.dev 中我所见过的最流行的二维码库
@MatheusMelo 如果你想使用 qr_code_scanner 添加这个到 pubspec.yaml 依赖覆盖：qr_code_scanner: git: url: github.com/X-SLAYER/qr_code_scanner.git ref: flutter-beta

【解决方案2】：

我不同意所选答案。 qr_code_scanner 库与 Flutter 3.0.1 兼容。

将qr_code_scanner 库升级到1.0.0。
将flutter升级为3.0.1。

现在您可以将qr_code_scanner 与flutter 3.x 一起使用，无需更改整个二维码库。

【讨论】：