public void login()
{
AGConnectAuth auth = AGConnectAuth.getInstance();
auth.signInAnonymously().addOnSuccessListener(new HuaweiOnsuccessListener <SignInResult> ((signresult) => {
TestTip.Inst.ShowText("sign in successfully." + signresult.getUser().getUid());
})).addOnFailureListener(new HuaweiOnFailureListener((e) => {
TestTip.Inst.ShowText("sign in failed");
}));
}