[移动开发]Unable to find bundled Java version =＞Mac Flutter问题 Android Studio Arctic Fox 2020.3.1

终端： flutter doctor -v? ? ?

1.? ?问题： android studio 提示?Unable to find bundled Java version

[!] Android Studio (version 2020.3)
    ? Android Studio at /Applications/Android Studio Preview.app/Contents
    ? Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    ? Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    ? Unable to find bundled Java version.
    ? Try updating or re-installing Android Studio.

处理方式：

cd /Applications/Android\ Studio.app/Contents/jre
ln -s ../jre jdk
ln -s "/Library/Internet Plug-Ins/JavaAppletPlugin.plugin" jdk

完美结果：

[?] Android Studio (version 2020.3)
    ? Android Studio at /Applications/Android Studio.app/Contents
    ? Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    ? Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    ? Java version OpenJDK Runtime Environment (build 11.0.10+0-b96-7281165)

2 问题

[!] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
    ? Android license status unknown.
      Run `flutter doctor --android-licenses` to accept the SDK licenses.
      See https://flutter.dev/docs/get-started/install/macos#android-setup for more details.

终端输入：flutter doctor --android-licenses 出现如下报错????????

Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema

at com.android.repository.api.SchemaModule$SchemaModuleVersion.<init>(SchemaModule.java:156)

at com.android.repository.api.SchemaModule.<init>(SchemaModule.java:75)

at com.android.sdklib.repository.AndroidSdkHandler.<clinit>(AndroidSdkHandler.java:81)

at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:73)

at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:48)

Caused by: java.lang.ClassNotFoundException: javax.xml.bind.annotation.XmlSchema

at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)

at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)

at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)

... 5 more

处理方法

? ? 1.? 更新下Android SDK的tools/bin目录下的sdkmanager

??????? ? ?终端输入：/Users/***/tools/bin/sdkmanager --update

? ??2. 配置JAVA_HOME

? ? ? ? ?mac下的jdk都默认安装在/Library/Java/JavaVirtualMachines下面。真实路径如下图所示：

WJdeMacBook-Pro:~ wj$ cd /Library/Java/JavaVirtualMachines
WJdeMacBook-Pro:JavaVirtualMachines wj$ ls -la
total 0
drwxr-xr-x  3 root  wheel   96  3 21 15:25 .
drwxr-xr-x  4 root  wheel  128  1  1  2020 ..
drwxr-xr-x  3 root  wheel   96  4  3  2019 jdk1.8.0_77.jdk

参照苹果的文件文档说明，在命令 /usr/libexec/java_home 后面使用-V选项列出所有版本的JAVA_HOME，即如下的结果:

WJdeMacBook-Pro:JavaVirtualMachines wj$ /usr/libexec/java_home -V
Matching Java Virtual Machines (2):
    1.8.77.03 (x86_64) "Oracle Corporation" - "Java" /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home
    1.8.0_77 (x86_64) "Oracle Corporation" - "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_77.jdk/Contents/Home
/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home

挑选自己需要的jdk版本，配置到.bash_profile中

终端输入：

? 1.? ?open .bash_profile

? 2.? ?export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_212.jdk/Contents/Home

? ? ? ? export PATH=$JAVA_HOME/bin:$PATH

? 3.? 上述2配置路径复制搭配 .bash_profile文件中

? 4.?保存之后，为了让配置立即生效，需要执行：source ~/.bash_profile命令

再次终端输入：flutter doctor

[!] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
    ! Some Android licenses not accepted.  To resolve this, run: flutter doctor
      --android-licenses

终端输入： flutter doctor --android-liceses

? ??出现多次：Review licenses that have not been accepted (y/N)?? ? ? ?一律输入：y再按回车键

完美结果：

WJdeMacBook-Pro:~ wj$ flutter doctor
***
[?] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
***