Flutter Android SDK版本28错误，但我正在使用30

如何解决Flutter Android SDK版本28错误，但我正在使用30

当我创建一个新的Flutter应用程序时，它将启动android sdk版本28，但我使用的是android sdk 30。 Flutter医生还展示了android-30平台，构建工具30.0.2。当我尝试安装url_launcher或shared_preferences之类的软件包时，出现错误，它查找的是Android SDK 30。 同样，每次我从build.gradle更改android sdk verison时。

这是我扑扑的医生的输出：

Flutter doctor -v
[✓] Flutter (Channel stable,1.22.0,on Linux,locale en_US.UTF-8)
    • Flutter version 1.22.0 at /home/Felix/snap/Flutter/common/Flutter
    • Framework revision d408d302e2 (7 days ago),2020-09-29 11:49:17 -0700
    • Engine revision 5babba6c4d
    • Dart version 2.10.0

 
[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
    • Android SDK at /home/Felix/Android/Sdk
    • Platform android-30,build-tools 30.0.2
    • Java binary at: /home/Felix/.local/share/JetBrains/ToolBox/apps/AndroidStudio/ch-0/193.6626763/jre/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)
    • All Android licenses accepted.

[!] Android Studio (version 4.0)
    • Android Studio at /home/Felix/.local/share/JetBrains/ToolBox/apps/AndroidStudio/ch-0/193.6626763
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593

）

网址启动器软件包错误：

FAILURE: Build Failed with an exception.

* What went wrong:
Execution Failed for task ':url_launcher:parseDebugLibraryResources'.
> Could not resolve all files for configuration ':url_launcher:androidApis'.
   > Failed to transform file 'android.jar' to match attributes {artifactType=android-platform-attr,org.gradle.libraryelements=jar,org.gradle.usage=java-runtime}
      > Execution Failed for PlatformAttrTransform: /home/computer/Android/Sdk/platforms/android-28/android.jar.
         > /home/computer/Android/Sdk/platforms/android-28/android.jar (No such file or directory)

* 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 2s

异常：Gradle任务assembleDebug失败，退出代码为1

我的build.gradle文件

    def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def FlutterRoot = localProperties.getProperty('Flutter.sdk')
if (FlutterRoot == null) {
    throw new GradleException("Flutter SDK not found. Define location with Flutter.sdk in the local.properties file.")
}

def FlutterVersionCode = localProperties.getProperty('Flutter.versionCode')
if (FlutterVersionCode == null) {
    FlutterVersionCode = '1'
}

def FlutterVersionName = localProperties.getProperty('Flutter.versionName')
if (FlutterVersionName == null) {
    FlutterVersionName = '1.0'
}

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply from: "$FlutterRoot/packages/Flutter_tools/gradle/Flutter.gradle"

android {
    compileSdkVersion 30

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }

    lintOptions {
        disable 'InvalidPackage'
    }

    defaultConfig {
        // Todo: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.example.appdeals"
        minSdkVersion 16
        targetSdkVersion 30
        versionCode FlutterVersionCode.toInteger()
        versionName FlutterVersionName
    }

    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
        }
    }
}

Flutter {
    source '../..'
}

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
}

shared_preferences错误：

FAILURE: Build Failed with an exception.

* What went wrong:
Execution Failed for task ':shared_preferences:parseDebugLibraryResources'.
> Could not resolve all files for configuration ':shared_preferences:androidApis'.
   > Failed to transform file 'android.jar' to match attributes {artifactType=android-platform-attr,org.gradle.usage=java-runtime}
      > Execution Failed for PlatformAttrTransform: /home/computer/Android/Sdk/platforms/android-28/android.jar.
         > /home/computer/Android/Sdk/platforms/android-28/android.jar (No such file or directory)

* 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 8s
Exception: Gradle task assembleDebug Failed with exit code 1
Exited (sigterm)

解决方法

在根项目的终端中尝试以下操作：

flutter pub upgrade

然后

flutter clean

然后再次运行您的项目。

,

尝试一下，

minSdkVersion 16
compiledSdkVersion 28
targetSdkVersion 29