And I also want use calibrate – sometimes you can see on other apps a warning that your device have to be calibrate and you have to wave your phone in a figure 8 pattern to reset magnetometr in your device.

i checked it in onAccuracyChanged, i checke the accuracy variable, but I don’t sure that it’s enought. Is it?

I hope you can help me,
Sorry for mistakes if any there, probably there are.

Greetings from Poland for all of you:)

https://github.com/ldo/3D-Compass

However if you only use value[2] to determine the orientation, you will never know if the phone is straight or straight,but upside down. for that, you’ll ned value[1] too. if it’s positive, then it’s upside down, if it’s negative, then it’s held straight. hope it helps.

Zoli

they’re likely just float arrays…

private float[] mGravity;
private float[] mGeomagnetic;

As to your latest post: The event/listener pattern still works as described by you, but getting the orientation values got quite complicated:

First of all, you’ve got to register the listener for ACCELEROMETER and MAGNETOMETER:


Sensor accelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
Sensor magnetometer = mSensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD);
if (accelerometer != null && magnetometer != null) {
mSensorManager.registerListener(this, accelerometer, SensorManager.SENSOR_DELAY_UI);
mSensorManager.registerListener(this, magnetometer, SensorManager.SENSOR_DELAY_UI);
} else {
Log.e(TAG, "no accelerometer!");
}

Then in the onSensorChanged method you get events for both sensors. Using them you can get the orientation values like so:


public void onSensorChanged(SensorEvent event) {
if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
mGravity = event.values;
}
if (event.sensor.getType() == Sensor.TYPE_MAGNETIC_FIELD) {
mGeomagnetic = event.values;
}
if (mGravity != null && mGeomagnetic != null) {
float R[] = new float[9];
float I[] = new float[9];
boolean success = SensorManager.getRotationMatrix(R, I, mGravity, mGeomagnetic);
if (success) {
float orientation[] = new float[3];
SensorManager.getOrientation(R, orientation);
// at this point, orientation contains the azimut, pitch and roll values.
}
}
...


However, I haven’t worked in the SensorManager lately and this being a year old post I know some of this has changed, multiple times in fact. I should do an update post.

The docs say SensorManager.SENSOR_ORIENTATION is deprecated now and point to Sensor.TYPE_ORIENTATION, which also says it’s deprecated and points to SensorManager.getOrientation(). However that’s an active method of looking up orientation and not applicable for most people’s usage where the previous event/listener pattern worked great. Oh well, like I said, I need to research it up again and make an update post.

Thanks for calling me out my mixups though.

If you want pitch, use “values[1]“. Not “values[2]“.