SensorEventListenerを実装してから、onSensorChangedのロールインを確認できます。
@Override
public void onSensorChanged(SensorEvent event) {
synchronized(this)
{
if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
mAccelerometerValues = event.values;
}
if (event.sensor.getType() == Sensor.TYPE_MAGNETIC_FIELD) {
mGeomageneticValues = event.values;
}
if ((mAccelerometerValues != null) && (mGeomageneticValues != null))
{
boolean success = SensorManager.getRotationMatrix(R, I, mAccelerometerValues, mGeomageneticValues);
if (success)
{
SensorManager.remapCoordinateSystem(R, SensorManager.AXIS_X, SensorManager.AXIS_Z, outR);
SensorManager.getOrientation(outR,orientation);
mYaw = orientation[0] * MathX.toDegreesF;
mPitch = orientation[1] * MathX.toDegreesF;
mRoll = orientation[2] * MathX.toDegreesF;
String sText = String.format("a:%1.4f\np:%1.4f\nr:%1.4f", yaw,pitch,roll);
}
}
}
}