how to work with vtiger library java?

vtiger lib for java not working properly, i used the documentation for vtwsclib.jar, and implemented the examples given in documentation but i always gets "false". is there an alternative way to use vtiger for android. I also used libray developed by @Vitaly, http://ift.tt/1878TzJ. but it gave error.

Exception in thread "main" java.lang.RuntimeException: java.lang.ClassNotFoundException: org.glassfish.jersey.client.JerseyClientBuilder

>>at javax.ws.rs.client.ClientBuilder.newBuilder(ClientBuilder.java:103)
at javax.ws.rs.client.ClientBuilder.newClient(ClientBuilder.java:114)
at su.litvak.vtiger.Main.main(Main.java:28)

Caused by: java.lang.ClassNotFoundException: org.glassfish.jersey.client.JerseyClientBuilder at java.net.URLClassLoader$1.run(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Unknown Source) at javax.ws.rs.client.FactoryFinder.newInstance(FactoryFinder.java:113) at javax.ws.rs.client.FactoryFinder.find(FactoryFinder.java:206) at javax.ws.rs.client.ClientBuilder.newBuilder(ClientBuilder.java:86) ... 2 more