颤振：第一次运行我的颤振应用程序时出现 gradle 错误答案

【问题标题】：flutter: getting gradle error while running my flutter app for the first time颤振：第一次运行我的颤振应用程序时出现 gradle 错误
【发布时间】：2020-03-15 06:57:45
【问题描述】：

这是我的第一个颤振应用程序。每次运行时都会出错。

我一开始以为是连接问题，即使我的连接很好，我仍然收到这个讨厌的错误

Launching lib/main.dart on TECNO L8 Lite in debug mode...
Initializing gradle...
[{"event":"app.progress","params":{"appId":"e76fdc75-00d2-4f4c-bf6c-b272d9d82041","id":"1","progressId":null,"message":"Resolving dependencies..."}}]Resolving dependencies...

Error running Gradle:
ProcessException: Process "/home/gun/projet/non_academic/perso/flutter_app_test/android/gradlew" exited abnormally:
Starting a Gradle Daemon, 1 incompatible Daemon could not be reused, use --status for details
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:3.2.1.
 Required by:
     project :
  > Could not resolve com.android.tools.build:gradle:3.2.1.
     > Could not get resource 'https://dl.google.com/dl/android/maven2/com/android/tools/build/gradle/3.2.1/gradle-3.2.1.pom'.
        > Could not GET 'https://dl.google.com/dl/android/maven2/com/android/tools/build/gradle/3.2.1/gradle-3.2.1.pom'.
           > Connect to localhost:80 [localhost/127.0.0.1] failed: Connection refused (Connection refused)
  > Could not resolve com.android.tools.build:gradle:3.2.1.
     > Could not get resource 'https://jcenter.bintray.com/com/android/tools/build/gradle/3.2.1/gradle-3.2.1.pom'.
        > Could not GET 'https://jcenter.bintray.com/com/android/tools/build/gradle/3.2.1/gradle-3.2.1.pom'.
           > Connect to localhost:80 [localhost/127.0.0.1] failed: Connection refused (Connection refused)
    Could not resolve org.jetbrains.kotlin:kotlin-gradle-plugin:1.2.71.
 Required by:
     project :
    Could not resolve org.jetbrains.kotlin:kotlin-gradle-plugin:1.2.71.
     > Could not get resource 'https://dl.google.com/dl/android/maven2/org/jetbrains/kotlin/kotlin-gradle-plugin/1.2.71/kotlin-gradle-plugin-1.2.71.pom'.
        > Could not GET 'https://dl.google.com/dl/android/maven2/org/jetbrains/kotlin/kotlin-gradle-plugin/1.2.71/kotlin-gradle-plugin-1.2.71.pom'.
           > Connect to localhost:80 [localhost/127.0.0.1] failed: Connection refused (Connection refused)
     Could not resolve org.jetbrains.kotlin:kotlin-gradle-plugin:1.2.71.
     Could not get resource 'https://jcenter.bintray.com/org/jetbrains/kotlin/kotlin-gradle-plugin/1.2.71/kotlin-gradle-plugin-1.2.71.pom'.
        > Could not GET 'https://jcenter.bintray.com/org/jetbrains/kotlin/kotlin-gradle-plugin/1.2.71/kotlin-gradle-plugin-1.2.71.pom'.
           > Connect to localhost:80 [localhost/127.0.0.1] failed: Connection refused (Connection refused)

 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.


BUILD FAILED in 28s
Command: /home/gun/projet/non_academic/perso/flutter_app_test/android/gradlew app:properties

 Finished with error: Please review your Gradle project setup in the android/ folder.

【问题讨论】：

标签： android gradle flutter dependencies

【解决方案1】：

您在构建应用程序时需要连接到互联网，除非在创建应用程序时使用 android studio 向导选择了离线选项。

【讨论】：

【解决方案2】：

试试这个，

在 yourapp\android\build.gradle mavenCentral() 在存储库中并在依赖项中更改 gradle 版本 3.2.0

buildscript {
    repositories {
        google()
        jcenter()
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.0'
    }
}

最后去 yourapp\android\gradle\wrapper\gradle-wrapper.properties 并更改 gradle 版本 4.6，

distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip

【讨论】：