Hostname not verified

I'm currently learning Android. For an assignment I need to make an app which requests a json over https using a self-signed certificate and an xampp server.

I've created the certificate using apache's tool makecert, added to android and set it up so that it would recognize however I keep getting this annoying error Hostname not verified:
                                                                             certificate: sha1/g6vc6lpQuz/43pvUpMYogNNiU2o=
                                                                             DN: CN=*,OU=Adi,O=Adi,L=Oradea,ST=Bihor,C=RO
                                                                             subjectAltNames: []

I've managed to identify this bit of code

            private HostnameVerifier getHostnameVerifier() {
            return new HostnameVerifier() {
                public boolean verify(String hostname, SSLSession session) {
                    //return true;
                    HostnameVerifier hv = HttpsURLConnection.getDefaultHostnameVerifier();
                    return hv.verify("*", session);

but I am stumped as how to fix it. I've looked at the other threads here and the solution of setting this to always return true does work but is not really acceptable.

I also tried creating a certificate with the CN* as I'm using multiple json files from xampps htdocs folder but still nothing

I've also tried creating a paired key using java keytool and exporting the file to a crt and key format but it caused apache to crash at startup

EDIT: One thing I've noticed is that no matter what CN I add in the certificate it always reads hostname as