Detect device orientation when Activity orientation is locked

Question

In my project, I have to lock the orientation of an activity. (I cannot recreate the activity)

I want to display a message when the user change the orientation of th

Answer 1

You can simply use OrientationEventListener to take orientation from sensor (written in Kotlin):

class MainActivity : AppCompatActivity() {

    private var orientationEventListener: OrientationEventListener? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        ...

        orientationEventListener = object : OrientationEventListener(context) {
            override fun onOrientationChanged(orientation: Int) {
                // orientation is in degrees

                // Show "The View is locked in this position ..." message if orientation is between 45° and 315°
                viewModel.showViewIsLocked(orientation in 45..315)
            }
        }       
    }

    override fun onResume() {
        super.onResume()
        orientationEventListener?.enable()      
    }

    override fun onPause() {
        orientationEventListener?.disable()
        super.onPause()
    }

}