Unity：无法构建 apk

Question

所以我已经尝试了我能找到的一切。它一直显示在下面。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。我尝试替换整个 sdk。我尝试卸载然后重新安装 android 工作室。我真的不知道还能做什么。有点失望，我终于完成了一个原创迷你游戏，但无法构建它。过去 12 个小时我一直在为此苦苦挣扎，唉。谢谢你的时间！

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 看来...

Java 9 removed the sun/misc/BASE64Encoder class.

A workaround is to downgrade to Java 8.

Unity：无法构建 apk

Unity: Failed to build apk

sdk

android

build

unity3d

apk