Flutter:Gradle构建无法生成.apk文件.该文件可能是在< app_root> \ build下生成的，但是该工具找不到它 [英] Flutter: Gradle build failed to produce an .apk file. It's likely that this file was generated under <app_root>\build, but the tool couldn't find it

问题描述

我正在尝试测试一个应用程序.由于应用无法调试/运行，我一直对此问题遇到一个奇怪的问题. SDK版本为28，其余版本如下:

I am trying to test drive an app. I keep getting a strange issue with this problem as app fail to debug/run. SDK version is 28 while the rest is below:

Flutter 1.13.9-pre.79 • channel master • https://github.com/flutter/flutter.git
Framework • revision 9eb9ea0ffa (6 hours ago) • 2020-01-13 21:30:42 -0800
Engine • revision 0235a50843
Tools • Dart 2.8.0 (build 2.8.0-dev.0.0 28c335d5a2)

Gradle构建无法生成.apk文件.这很可能是 文件是在C:\ Development \\ build下生成的，但是该工具 找不到它.

Gradle build failed to produce an .apk file. It's likely that this file was generated under C:\Development\\build, but the tool couldn't find it.

是否可以通过提供或提供Gradle的输出路径来传递此问题或配置，从而使我能够运行? .apk似乎是由于错误状态而生成的.

Is there a way to pass this issue or a configuration that can allow me to run by providing or giving the output path to Gradle? The .apk seems to generated as the error states.

更新:

Android Studio -v 3.5.3 
Gradle -v 3.4.2 
Gradle Wrapper -v 5.1.1

推荐答案

在我的情况下，我有一个像这样的多功能应用程序:

in my case I have a multi flavor app like this:

 android {

    ...

    buildTypes {
        release {
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
            signingConfig signingConfigs.debug
        }
    }

    flavorDimensions "flavor-type"

    productFlavors{
        development{
            dimension "flavor-type"
        }
        staging{
            dimension "flavor-type"
        }
        production{
            dimension "flavor-type"
        }
    }
}

因此，如果要运行应用程序，则必须先编写风味名称，然后再编写包含main()函数的类名称

So if you want to run app you have to write the flavor name and then the class name that hold main() function

flutter run --flavor staging -t lib/main_staging.dart

我解决了我的错误并构建了.apk

and I solved my error and built the .apk

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