flutter starter应用程序找不到JDK安装

Question

我已经克隆了flatterrepo并安装了androidsdk命令行工具，在$HOME/Android中进行了设置。然后，我通过将$ANDROID\u HOME设置为$HOME/ANDROID使flatter意识到SDK的安装。通过

• Android SDK
• 我的JavaJDK 8安装（openjdk-8-jdk包上的Ubuntu 18.04），和
• 带USB调试的连接Android手机

我现在尝试按照测试运行说明在命令行上构建第一个应用程序<代码>

cd myapp
~/myapp$ ANDROID_HOME=~/Android JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-amd64 <path-to-flutter> run

这将导致以下错误：

Launching lib/main.dart on ONEPLUS A6013 in debug mode...
                                                                        
FAILURE: Build failed with an exception.                                
                                                                        
* What went wrong:                                                      
Execution failed for task ':app:compileDebugKotlin'.                    
> Kotlin could not find the required JDK tools in the Java installation '/usr/lib/jvm/java-8-openjdk-amd64/jre' used by Gradle. Make sure Gradle is running on a JDK, not JRE.
                                                                        
* 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 10s                                                     
Running Gradle task 'assembleDebug'...                                  
Running Gradle task 'assembleDebug'... Done                        11.0s
Exception: Gradle task assembleDebug failed with exit code 1

我以前见过讨论过这个问题，但这些答复似乎都没有解决这个问题（至少在我的情况下）。您可以从命令中看到，我正在导出正确的$JAVA_HOME，并且正在运行

./android/gradlew build

在myapp目录中，可以执行以下操作：

~/myapp$ ./android/gradlew build

> Task :buildEnvironment

------------------------------------------------------------
Root project
------------------------------------------------------------

classpath
No dependencies

A web-based, searchable dependency report is available by adding the --scan option.

BUILD SUCCESSFUL in 319ms
1 actionable task: 1 executed

所以这似乎是特定于flutter本身的，而不是gradle。




Answer 1

你能这样做吗--

sudo apt-get remove --auto-remove openjdk*
sudo apt-get install openjdk-8-jre

现在转到主页，按下ctrl h可以看到隐藏的文件夹

现在打开. bashrc或您的. rc

把这些贴在最后

export PATH="$PATH:/snap/bin/flutter/bin"
export PATH="$PATH:/usr/bin/java"
export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-amd64/jre
export ANDROID_SDK_ROOT=/home/<YOUR USER NAME>/Android/Sdk

然后跑

source ~/bashrc
flutter doctor -v

Answer 2

事实证明，这一定是一个路径问题。在我的个人资料（my.bashrc）中的源文件中插入以下代码片段后，将生成颤振入门应用程序（并在我的设备上弹出）：

# Java
export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-amd64

# Android
export ANDROID_HOME=${HOME}/Android
export ANDROID_SDK_ROOT=${HOME}/Android

# Flutter
export FLUTTER_HOME=${HOME}/repos/flutter
PATH=${FLUTTER_HOME}/bin:$PATH; export PATH