I'm experimenting with a camera app that shows you the inclination angle of the phone to help you level the phone.
As shown below, the sensor angle should say 90% when the phone is standing upright:
what I'm trying to do is similar to Google's Camera app which shows you the tilt angle and inclination angle:
I have the following implementation that uses Sensor.TYPE_ROTATION_VECTOR, but the problem I have is that the angle changes based on the starting position/angle of the phone. I want a consistent angle measurement that shows 90% when the phone is standing upright.
class MainActivity : Activity(), SensorEventListener {
private var mSensorManager: SensorManager? = null
private var mRotationVectorSensor: Sensor? = null
private val rotationMatrix = FloatArray(9)
private val orientationAngles = FloatArray(3)
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
// Get an instance of the SensorManager
mSensorManager = getSystemService(SENSOR_SERVICE) as SensorManager
mRotationVectorSensor = mSensorManager!!.getDefaultSensor(Sensor.TYPE_ROTATION_VECTOR)
mSensorManager!!.registerListener(
this, mRotationVectorSensor, SensorManager.SENSOR_DELAY_NORMAL
)
}
override fun onSensorChanged(event: SensorEvent) {
if (event.sensor.type == Sensor.TYPE_ROTATION_VECTOR) {
// Convert the rotation-vector to a 3x3 matrix.
SensorManager.getRotationMatrixFromVector(rotationMatrix, event.values)
SensorManager.getOrientation(rotationMatrix, orientationAngles)
val inclination = SensorManager.getInclination(rotationMatrix)
val degree = Math.toDegrees(inclination.toDouble())
Log.d("++tiltAngleDegrees,", degree.roundToInt().toString())
}
}
}
I also tried using remapCoordinateSystem, but that didn't fix the issue:
SensorManager.remapCoordinateSystem(
rotationMatrix, SensorManager.AXIS_X, SensorManager.AXIS_Z, rotationMatrix
)
Android SensorManager strange how to remapCoordinateSystem is a similar StackOverflow post, but it's about the tilt or orientation angle
