Unity：无法构建apk

Question

所以我尝试了所有我能找到的东西。它一直显示如下。我尝试用较低版本替换工具文件夹（C：/ Users /（我的用户名）/ AppData / Local / Android / Sdk。我尝试更换整个sdk。我尝试卸载然后重新安装android工作室。我真的不喜欢我不知道还能做些什么。有点令人失望的是我终于完成了一个原创的迷你游戏，却无法建立起来。在过去的12个小时里，我一直在努力解决这个问题。感谢您的时间！

Error building Player: CommandInvokationFailure: Failed to build apk. See the Console for details.
C:/Program Files/Java/jdk-9.0.1\bin\java.exe -Xmx2048M -Dcom.android.sdkmanager.toolsdir="C:/Users/dlma1/AppData/Local/Android/Sdk\tools" -Dfile.encoding=UTF8 -jar "D:\Programming\Unity\Editor\Data\PlaybackEngines\AndroidPlayer/Tools\sdktools.jar" -

stderr[
Exception in thread "main" java.lang.reflect.InvocationTargetException
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:564)
    at SDKMain.main(SDKMain.java:129)
Caused by: java.lang.NoClassDefFoundError: sun/misc/BASE64Encoder
    at com.android.sdklib.internal.build.SignedJarBuilder.<init>(SignedJarBuilder.java:177)
    at com.android.sdklib.build.ApkBuilder.init(ApkBuilder.java:446)
    at com.android.sdklib.build.ApkBuilder.<init>(ApkBuilder.java:422)
    at com.android.sdklib.build.ApkBuilder.<init>(ApkBuilder.java:362)
    at UnityApkBuilder.<init>(UnityApkBuilder.java:212)
    at UnityApkBuilder.main(UnityApkBuilder.java:34)
    ... 5 more
Caused by: java.lang.ClassNotFoundException: sun.misc.BASE64Encoder
    at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:466)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:563)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:496)
    ... 11 more
]
stdout[

]

Answer 1

根据this answer，似乎......

Java 9删除了sun / misc / BASE64Encoder类。

解决方法是降级到Java 8。