创建一个新的Flutter应用程序并尝试运行它(使用Android Studio 3.5.3或Terminal.app(后，它给出以下输出：
% flutter run
Using hardware rendering with device sdk gphone x86 arm. If you notice graphics
artifacts, consider enabling software rendering with
"--enable-software-rendering".
Launching lib/main.dart on sdk gphone x86 arm in debug mode...
FAILURE: Build failed with an exception.
* What went wrong:
A problem occurred configuring root project 'android'.
> Could not resolve all artifacts for configuration ':classpath'.
> Could not resolve com.android.tools.build:gradle:4.1.0.
Required by:
project :
> Could not resolve com.android.tools.build:gradle:4.1.0.
> Could not get resource 'https://dl.google.com/dl/android/maven2/com/android/tools/build/gradle/4.1.0/gradle-4.1.0.pom'.
> Could not GET 'https://dl.google.com/dl/android/maven2/com/android/tools/build/gradle/4.1.0/gradle-4.1.0.pom'.
> sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
* 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 3s
Running Gradle task 'assembleDebug'...
Running Gradle task 'assembleDebug'... Done 4.7s
Exception: Gradle task assembleDebug failed with exit code 1
如果我通过Android Studio或终端运行应用程序，就会发生这种情况。Flutter应用程序在iOS模拟器上完美运行，没有任何错误。
进一步的上下文：
- Android Studio 3.5.3
- macOS Big Sur 11.4
- MacBook Pro 13.3〃；(Retina，2015年初，16GB RAM，512GB SSD，英特尔酷睿i7(
- Fresh Flutter应用程序
- 颤振2.2.2
flutter doctor -v输出：% flutter doctor -v [✓] Flutter (Channel stable, 2.2.2, on macOS 11.4 20F71 darwin-x64, locale en-US) • Flutter version 2.2.2 at /Users/peternielsen/.mymods/flutter • Framework revision d79295af24 (4 weeks ago), 2021-06-11 08:56:01 -0700 • Engine revision 91c9fc8fe0 • Dart version 2.13.3 [✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3) • Android SDK at /Users/peternielsen/Library/Android/sdk • Platform android-30, build-tools 30.0.3 • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405) • All Android licenses accepted. [✓] Xcode - develop for iOS and macOS • Xcode at /Applications/Xcode.app/Contents/Developer • Xcode 12.5.1, Build version 12E507 • CocoaPods version 1.10.1 [✓] Chrome - develop for the web • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome [✓] Android Studio (version 3.5) • Android Studio at /Applications/Android Studio.app/Contents • Flutter plugin version 44.0.1 • Dart plugin version 191.8593 • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405) [✓] VS Code (version 1.57.1) • VS Code at /Applications/Visual Studio Code.app/Contents • Flutter extension version 3.24.0 [✓] Connected device (2 available) • sdk gphone x86 arm (mobile) • emulator-5554 • android-x86 • Android 11 (API 30) (emulator) • Chrome (web) • chrome • web-javascript • Google Chrome 91.0.4472.114 • No issues found!
提前感谢您的帮助！我不知道为什么当医生的输出显示没有问题时，它会失败——我是不是遗漏了什么？
编辑：
app/build.gradle:
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: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
android {
compileSdkVersion 30
sourceSets {
main.java.srcDirs += 'src/main/kotlin'
}
defaultConfig {
// TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
applicationId "com.example.statemanagementzero"
minSdkVersion 16
targetSdkVersion 30
versionCode flutterVersionCode.toInteger()
versionName flutterVersionName
}
buildTypes {
release {
// TODO: Add your own signing config for the release build.
// Signing with the debug keys for now, so `flutter run --release` works.
signingConfig signingConfigs.debug
}
}
}
flutter {
source '../..'
}
dependencies {
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
}
build.gradle:
buildscript {
ext.kotlin_version = '1.3.50'
repositories {
google()
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:4.1.0'
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
}
}
allprojects {
repositories {
google()
jcenter()
}
}
rootProject.buildDir = '../build'
subprojects {
project.buildDir = "${rootProject.buildDir}/${project.name}"
project.evaluationDependsOn(':app')
}
task clean(type: Delete) {
delete rootProject.buildDir
}
此错误显示在中
sun.security.validator.ValidatorException:
PKIX path building failed:
sun.security.provider.certpath.SunCertPathBuilderException:
unable to find valid certification path to requested target
网上有一些关于这个问题的解决方案，但如果你安装一个干净的JDK会更容易。否则，如果想探索，请尝试此线程。