Ping doesnt work

[hungdev]

[Android] It always returns Here is my code

                Ping.onAddress("google.com").setTimeOutMillis(1000).doPing(new Ping.PingListener() {
                    @Override
                    public void onResult(PingResult pingResult) {
                        Log.d("hel1", String.valueOf(pingResult));
                    }

                    @Override
                    public void onFinished(PingStats pingStats) {
                        Log.d("hel2", String.valueOf(pingStats));
                    }

                    @Override
                    public void onError(Exception e) {
                        Log.d("hel3", String.valueOf(e));
                    }
                });

[hungdev]

It doesnt work on emulator. It worked on real device.