public void StartListening()
{
if (_sensorManager == null)
{
_sensorManager = (SensorManager)Forms.Context.GetSystemService(Context.SensorService);
}
if (_accelerometer == null)
{
_accelerometer = _sensorManager?.GetDefaultSensor(SensorType.Accelerometer);
}
if (_magnetometer == null)
{
_magnetometer = _sensorManager?.GetDefaultSensor(SensorType.MagneticField);
}
if (_sensorEventListener == null)
{
_sensorEventListener = new SensorEventListener(HeadingChanged);
}
_sensorManager.RegisterListener(_sensorEventListener, _accelerometer, SensorDelay.Normal);
_sensorManager.RegisterListener(_sensorEventListener, _magnetometer, SensorDelay.Normal);
}
public override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
mListener = new SensorEventListener()
{
OnSensorChangedAction = (SensorEvent e) =>
{
// Store the delay of this event
RecordDelay(e);
string delayString = DelayString;
if (e.Sensor.Type == SensorType.StepDetector)
{
// A step detector event is received for each step.
// This means we need to count steps ourselves
mSteps += e.Values.Count;
// Update the card with the latest step count
CardStream.GetCard(CARD_COUNTING).SetTitle(GetString(Resource.String.counting_title, new Java.Lang.Integer(mSteps)))
.SetDescription(GetString(Resource.String.counting_description,
GetString(Resource.String.sensor_detector), new Java.Lang.Integer(mMaxDelay), new Java.Lang.String(delayString)));
Log.Info(TAG, "New step detected by STEP_DETECTOR sensor. Total step count: " + mSteps);
}
else if (e.Sensor.Type == SensorType.StepCounter)
{
// A step counter event contains the total number of steps since the listener was first registered.
// We need to keep track of this initial value to calculate the number of steps taken,
// as the first value a listener receives is undefined
if (mCounterSteps < 1)
{
// Initial value
mCounterSteps = (int)e.Values[0];
}
// Calculate stes taken based on first counter value received
mSteps = (int)e.Values[0] - mCounterSteps;
// Add the number of steps previously taken, otherwise the counter would start as 0.
// This is needed to keep the counter consistent across rotation changes.
mSteps += mPreviousCounterSteps;
// Update the card with the latest step count
CardStream.GetCard(CARD_COUNTING).SetTitle(GetString(Resource.String.counting_title, new Java.Lang.Integer(mSteps)))
.SetDescription(GetString(Resource.String.counting_description,
GetString(Resource.String.sensor_counter), new Java.Lang.Integer(mMaxDelay), new Java.Lang.String(delayString)));
Log.Info(TAG, "New step detected by STEP_COUNTER sensor. Total step count: " + mSteps);
}
}
};
}
public override void OnCreate (Bundle savedInstanceState)
{
base.OnCreate (savedInstanceState);
mListener = new SensorEventListener () {
OnSensorChangedAction = (SensorEvent e) =>
{
// Store the delay of this event
RecordDelay(e);
string delayString = DelayString;
if (e.Sensor.Type == SensorType.StepDetector) {
// A step detector event is received for each step.
// This means we need to count steps ourselves
mSteps += e.Values.Count;
// Update the card with the latest step count
CardStream.GetCard(CARD_COUNTING).SetTitle(GetString(Resource.String.counting_title, new Java.Lang.Integer(mSteps)))
.SetDescription(GetString(Resource.String.counting_description,
GetString(Resource.String.sensor_detector), new Java.Lang.Integer(mMaxDelay), new Java.Lang.String(delayString)));
Log.Info(TAG, "New step detected by STEP_DETECTOR sensor. Total step count: " + mSteps);
} else if (e.Sensor.Type == SensorType.StepCounter) {
// A step counter event contains the total number of steps since the listener was first registered.
// We need to keep track of this initial value to calculate the number of steps taken,
// as the first value a listener receives is undefined
if (mCounterSteps < 1) {
// Initial value
mCounterSteps = (int) e.Values[0];
}
// Calculate stes taken based on first counter value received
mSteps = (int)e.Values[0] - mCounterSteps;
// Add the number of steps previously taken, otherwise the counter would start as 0.
// This is needed to keep the counter consistent across rotation changes.
mSteps += mPreviousCounterSteps;
// Update the card with the latest step count
CardStream.GetCard(CARD_COUNTING).SetTitle(GetString(Resource.String.counting_title, new Java.Lang.Integer(mSteps)))
.SetDescription(GetString(Resource.String.counting_description,
GetString(Resource.String.sensor_counter), new Java.Lang.Integer(mMaxDelay), new Java.Lang.String(delayString)));
Log.Info(TAG, "New step detected by STEP_COUNTER sensor. Total step count: " + mSteps);
}
}
};
}
