[error record] the flutter reports an error (could not resolve io.flutter:flutter_embedding_debug:1.0.0.)

One 、 Error message

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I downloaded one from the Internet Flutter Project code , When open , Report the following error ;

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 :app         project :app > project :image_picker         project :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 4sFinished with error: Gradle task assembleDebug failed with exit code 1

Two 、 Solution

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stay Flutter Under the project of android/build.gradle The configuration is as follows :

stay repositories Configure the following sources : Comment out google() and jcenter() , And add the following code , Do not move other configurations ;

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" }

The complete code is as follows :

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}

The problem has been solved by using the above scheme ;

3、 ... and 、 alternative

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( The scheme has not been tested )

stay flutter\packages\flutter_tools\gradle\resolve_dependencies.gradle in ,

Add the following code :

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

Note where to add :

repositories Configuration after adding :

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