callByteMethod
Invokes an instance (nonstatic) method on a Java object, according to the specified method ID. The methodId argument must be obtained by calling methodId.
When used to call private methods and constructors, the method ID must be derived from the real class of the receiver, not from one of its superclasses.
You should use this function only if the Java method you are calling returns byte values.
Return
the result of calling the Java method.
Throws
Exceptions raised during the execution of the Java method.