Basically, there are armeabi-v7a and x86 built under the following path.
\android\build\intermediates\exploded-aar\org.xwalk\xwalk_core_library\16.45.421.19\jni\
I'd like to know how can I build arm64-v8a and x86_64 under this path.
I run cordova build android
to build the project.
According to the cordova-plugin-crosswalk-webview readme you can use
cordova build android --xwalk64bit