Application in fixed landscape. How to detect phone orientation

I'm building android app that is only in landscape mode. How can i detect the phone orientation as fast as开发者_如何学编程 possible? I have tried with

`Display display = ((WindowManager) getSystemService(WINDOW_SERVICE)).getDefaultDisplay();

display.getOrientation();`

and also with the SensorEventListener, but I can't get any values for X,Y or Z? How can I do this? any solution? I was using this example for sensor. link for the sensor event listener

To keep an activity only in portrait mode add this in the manifest xml tag

android:screenOrientation="portrait"