private void displayElapsedTime() {
long calibrationStopTime = System.currentTimeMillis();
long elapsedTime = calibrationStopTime - calibrationStartTime;
Toast.makeText(this, "Elapsed time: " + elapsedTime + " ms", Toast.LENGTH_LONG).show();
calibrationStartTime = System.currentTimeMillis();
}
public void startSampling(final SensorEventListener listener) {
samples.clear();
Sensor accelerometer = sensor.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
calibrationStartTime = System.currentTimeMillis();
sensor.registerListener(listener, accelerometer, SensorManager.SENSOR_DELAY_NORMAL);
}