Question

最近我将Flutter版本更新为最新版本，然后出现以下错误：

Launching lib/main.dart on Android SDK built for x86 in debug mode...
Running Gradle task 'assembleDebug'...
Warning: Failed to parse host [PROXY SERVER] systemProp.http.proxyPort=[PROXY PORT]
Warning: Failed to parse host [PROXY SERVER] systemProp.http.proxyPort=[PROXY PORT]

FAILURE: Build failed with an exception.

* What went wrong:
Could not determine the dependencies of task ':app:compileDebugJavaWithJavac'.
> Could not resolve all task dependencies for configuration ':app:debugCompileClasspath'.
   > Could not resolve io.flutter:flutter_embedding_debug:1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695.
     Required by:
         project :app
      > Could not resolve io.flutter:flutter_embedding_debug:1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695.
         > Could not get resource 'http://download.flutter.io/io/flutter/flutter_embedding_debug/1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695/flutter_embedding_debug-1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695.pom'.
            > Host name may not contain blanks
      > Could not resolve io.flutter:flutter_embedding_debug:1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695.
         > Could not get resource 'http://download.flutter.io/io/flutter/flutter_embedding_debug/1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695/flutter_embedding_debug-1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695.pom'.
            > Host name may not contain blanks
      > Could not resolve io.flutter:flutter_embedding_debug:1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695.
         > Could not get resource 'http://download.flutter.io/io/flutter/flutter_embedding_debug/1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695/flutter_embedding_debug-1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695.pom'.
            > Host name may not contain blanks
   > Could not resolve io.flutter:x86_debug:1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695.
     Required by:
         project :app
      > Could not resolve io.flutter:x86_debug:1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695.
         > Could not get resource 'http://download.flutter.io/io/flutter/x86_debug/1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695/x86_debug-1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695.pom'.
            > Host name may not contain blanks
      > Could not resolve io.flutter:x86_debug:1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695.
         > Could not get resource 'http://download.flutter.io/io/flutter/x86_debug/1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695/x86_debug-1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695.pom'.
            > Host name may not contain blanks
      > Could not resolve io.flutter:x86_debug:1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695.
         > Could not get resource 'http://download.flutter.io/io/flutter/x86_debug/1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695/x86_debug-1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695.pom'.
            > Host name may not contain blanks
   > Could not resolve io.flutter:x86_64_debug:1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695.
     Required by:
         project :app
      > Could not resolve io.flutter:x86_64_debug:1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695.
         > Could not get resource 'http://download.flutter.io/io/flutter/x86_64_debug/1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695/x86_64_debug-1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695.pom'.
            > Host name may not contain blanks
      > Could not resolve io.flutter:x86_64_debug:1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695.
         > Could not get resource 'http://download.flutter.io/io/flutter/x86_64_debug/1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695/x86_64_debug-1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695.pom'.
            > Host name may not contain blanks
      > Could not resolve io.flutter:x86_64_debug:1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695.
         > Could not get resource 'http://download.flutter.io/io/flutter/x86_64_debug/1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695/x86_64_debug-1.0.0-2994f7e1e682039464cb25e31a78b86a3c59b695.pom'.
            > Host name may not contain blanks

* 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 5s
Finished with error: Gradle task assembleDebug failed with exit code 1

当我创建一个新项目时，它也会创建此错误。我尝试了不同版本的flutter和1.9.7版。更高版本会产生所有相同的错误。 gradle似乎是一个问题。使用gradle 3.2.1，一切正常。

Answer 1

我认为这与您的代理配置有关，如前5行中的警告所示。

在gradle.properties中查看您的代理配置

Answer 2

您应该使用source.on('addfeature', function(event) { var lineString = event.feature.getGeometry(); if (lineString.getType() == 'MultiLineString') { lineString = lineString.getLineString(0); } var totalKm = ol.sphere.getLength(lineString); var previous = lineString.getCoordinateAt(0); for (var i = 1; i <= totalKm; i++) { var position = lineString.getCoordinateAt(i / totalKm); var time = position[3] - previous[3]; var elev = position[2] - previous[2]; var previous = position; } }打开项目，然后打开AndroidStudio

并清除您的gradle.properties

这种方法对我有用

如果您的国家像对伊朗的制裁一样，请使用vpn

Flutter未针对1.10或更高版本进行构建

2 个答案: