文章目錄

• 一、 報錯信息
• 二、 解決方案
• 三、 備選方案

一、 報錯信息

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從網上下載了一個 Flutter 工程代碼 , 打開時 , 報如下錯誤 ;

Launching lib\main.dart on Pixel 2 in debug mode... Running Gradle task 'assembleDebug'...FAILURE: Build failed with an exception.* What went wrong: Could not determine the dependencies of task ':app:preDebugBuild'. > Could not resolve all task dependencies for configuration ':app:debugRuntimeClasspath'.> Could not resolve io.flutter:flutter_embedding_debug:1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c.Required by:project :appproject :app > project :image_pickerproject :app > project :url_launcher> Could not resolve io.flutter:flutter_embedding_debug:1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c.> Could not get resource 'https://jcenter.bintray.com/io/flutter/flutter_embedding_debug/1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c/flutter_embedding_debug-1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c.pom'.> Could not HEAD 'https://jcenter.bintray.com/io/flutter/flutter_embedding_debug/1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c/flutter_embedding_debug-1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c.pom'. Received status code 500 from server: Internal Server Error> Could not resolve io.flutter:arm64_v8a_debug:1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c.Required by:project :app> Could not resolve io.flutter:arm64_v8a_debug:1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c.> Could not get resource 'https://jcenter.bintray.com/io/flutter/arm64_v8a_debug/1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c/arm64_v8a_debug-1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c.pom'.> Could not HEAD 'https://jcenter.bintray.com/io/flutter/arm64_v8a_debug/1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c/arm64_v8a_debug-1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c.pom'. Received status code 500 from server: Internal Server Error> Could not resolve io.flutter:x86_debug:1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c.Required by:project :app> Could not resolve io.flutter:x86_debug:1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c.> Could not get resource 'https://jcenter.bintray.com/io/flutter/x86_debug/1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c/x86_debug-1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c.pom'.> Could not HEAD 'https://jcenter.bintray.com/io/flutter/x86_debug/1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c/x86_debug-1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c.pom'. Received status code 502 from server: Bad Gateway> Could not resolve io.flutter:x86_64_debug:1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c.Required by:project :app> Could not resolve io.flutter:x86_64_debug:1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c.> Could not get resource 'https://jcenter.bintray.com/io/flutter/x86_64_debug/1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c/x86_64_debug-1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c.pom'.> Could not HEAD 'https://jcenter.bintray.com/io/flutter/x86_64_debug/1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c/x86_64_debug-1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c.pom'. Received status code 502 from server: Bad Gateway* 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.orgBUILD FAILED in 4s Finished with error: Gradle task assembleDebug failed with exit code 1

二、 解決方案

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在 Flutter 工程下的 android/build.gradle 下進行如下配置 :

在 repositories 配置如下源 : 注釋掉 google() 和 jcenter() , 并添加如下代碼 , 其它配置不用動 ;

maven { url 'https://maven.aliyun.com/repository/google' } maven { url 'https://maven.aliyun.com/repository/jcenter' } maven { url 'http://maven.aliyun.com/nexus/content/groups/public' } maven { url "http://download.flutter.io" }

完整代碼如下 :

buildscript {repositories {//google()//jcenter()maven { url 'https://maven.aliyun.com/repository/google' }maven { url 'https://maven.aliyun.com/repository/jcenter' }maven { url 'http://maven.aliyun.com/nexus/content/groups/public' }maven { url "http://download.flutter.io" }}dependencies {classpath 'com.android.tools.build:gradle:3.3.0'} }allprojects {repositories {//google()//jcenter()maven { url 'https://maven.aliyun.com/repository/google' }maven { url 'https://maven.aliyun.com/repository/jcenter' }maven { url 'http://maven.aliyun.com/nexus/content/groups/public' }maven { url "http://download.flutter.io" }} }rootProject.buildDir = '../build' subprojects {project.buildDir = "${rootProject.buildDir}/${project.name}" } subprojects {project.evaluationDependsOn(':app') }task clean(type: Delete) {delete rootProject.buildDir }

使用上述方案已解決問題 ;

三、 備選方案

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( 該方案沒有經過測試 )

在 flutter\packages\flutter_tools\gradle\resolve_dependencies.gradle 中 ,

添加如下代碼 :

maven {url 'http://download.flutter.io' }

注意添加位置 :

repositories 添加后的配置 :

repositories {google()jcenter()maven {url "$storageUrl/download.flutter.io"}maven {url 'http://download.flutter.io'} }

總結

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