How to detect orientation change in layout in Android?

Question

I just implemented a orientation change feature - e.g. when the layout changes from portrait to landscape (or vice versa). How can I detect when the orientation change event

Answer 1

for Kotilin implementation in the simplest form - only fires when screen changes from portrait <--> landscape if need device a flip detection (180 degree) you'll need to tab in to gravity sensor values

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)

val rotation = windowManager.defaultDisplay.rotation

    when (rotation) {            
        0 -> Log.d(TAG,"at zero degree")
        1 -> Log.d(TAG,"at 270 degree")
        2 -> Log.d(TAG,"at 180 degree")
        3 -> Log.d(TAG,"at 90 degree")


    }
}