android - ionic : compileSdkVersion is not specified - Could not find method leftShift()

Question

我刚刚使用 Ionic 4 启动了我的应用程序。目前我从未对您在启动项目时拥有的原始代码(带有侧边菜单)进行任何修改。 在出现许多其他错误之后，我遇到了这个我不知道如何修复的错误。 它发生在我尝试:

ionic cordova build android

    FAILURE: Build completed with 2 failures.

1: Task failed with an exception.
-----------
* Where:
Build file 'D:\workspace\iganalytics\app\platforms\android\app\build.gradle' line: 148

* What went wrong:
A problem occurred evaluating project ':app'.
> Could not find method leftShift() for arguments [build_8ka4my3njl1nfn72j8pdlyfze$_run_closure6@5b9f348] on task ':app:cdvPrintProps' of type org.gradle.api.DefaultTask.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
==============================================================================

2: Task failed with an exception.
-----------
* What went wrong:
A problem occurred configuring project ':app'.
> compileSdkVersion is not specified.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
==============================================================================

* Get more help at https://help.gradle.org

BUILD FAILED in 1s
cmd: Command failed with exit code 1 Error output:
FAILURE: Build completed with 2 failures.

1: Task failed with an exception.
-----------
* Where:
Build file 'D:\workspace\iganalytics\app\platforms\android\app\build.gradle' line: 148

* What went wrong:
A problem occurred evaluating project ':app'.
> Could not find method leftShift() for arguments [build_8ka4my3njl1nfn72j8pdlyfze$_run_closure6@5b9f348] on task ':app:cdvPrintProps' of type org.gradle.api.DefaultTask.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
==============================================================================

2: Task failed with an exception.
-----------
* What went wrong:
A problem occurred configuring project ':app'.
> compileSdkVersion is not specified.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
==============================================================================

* Get more help at https://help.gradle.org

BUILD FAILED in 1s
[ERROR] An error occurred while running subprocess cordova.

        cordova build android exited with exit code 1.

        Re-running this command with the --verbose flag may provide more information.

我将这一行添加到 config.xml 中:

<preference name="android-targetSdkVersion" value="28" />

没有运气。

build.gradle 第 148 行开始于:

task cdvPrintProps << {
    println('cdvCompileSdkVersion=' + cdvCompileSdkVersion)
    println('cdvBuildToolsVersion=' + cdvBuildToolsVersion)
    println('cdvVersionCode=' + cdvVersionCode)
    println('cdvVersionCodeForceAbiDigit=' + cdvVersionCodeForceAbiDigit)
    println('cdvMinSdkVersion=' + cdvMinSdkVersion)
    println('cdvBuildMultipleApks=' + cdvBuildMultipleApks)
    println('cdvReleaseSigningPropertiesFile=' + cdvReleaseSigningPropertiesFile)
    println('cdvDebugSigningPropertiesFile=' + cdvDebugSigningPropertiesFile)
    println('cdvBuildArch=' + cdvBuildArch)
    println('computedVersionCode=' + android.defaultConfig.versionCode)
    android.productFlavors.each { flavor ->
        println('computed' + flavor.name.capitalize() + 'VersionCode=' + flavor.versionCode)
    }
}

Answer 1

设法通过添加平台 android@8 而不是仅安装版本 7 的 android 使其工作