Can not reproduce it. (tested with Android 7.1)
I still haven’t tested that yet, but which jdk and what version of java are you using, how can it not include the java nio and what’s
/system/framework/core-jo.jar ? seems you have a broken jdk…or problems with android sdk.
This should be your right location for the
IntBuffer class :
/home/twisted/Android/Sdk/sources/android-30/java/nio as an example.
I solved this problem after using JDK1.8 on androidStudio