Device yaw in degrees using gyroscope.

Erel said:

Which device are you using? Most devices do not have a gyroscope sensor.

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Erel said:

You can read about the sensors here: Motion Sensors | Android Developers

I think that you need to use the orientation sensor instead of the gyroscope.

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MLDev said:

The accelerometer can do that. Hold your device like a steering wheel and this will show the angle it's tilted.

B4X:

Sub Process_Globals
    Dim Accelerometer As PhoneAccelerometer
End Sub

Sub Globals
   Dim lblAngle As Label
End Sub

Sub Activity_Create(FirstTime As Boolean)
    If FirstTime Then
      lblAngle.Initialize("")
      lblAngle.TextSize = 20
      Activity.AddView(lblAngle, 40%x, 45%y, 20%x, 30dip)
    End If
End Sub

Sub Activity_Resume
    Accelerometer.StartListening("Accelerometer")
End Sub

Sub Activity_Pause (UserClosed As Boolean)
    Accelerometer.StopListening
End Sub

Sub Accelerometer_AccelerometerChanged (X As Float, Y As Float, Z As Float)
   lblAngle.Text = "Angle = " & Round(ATan2D(Y, X))
End Sub

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