I've been having issues with this for far too long.  This code should output dx,dy,dz for the accelerometer, and a running total of the dx.  It should also output azimuth, pitch, and roll.
I've used info from http://bit.ly/codeUsed, but to no avail.
This code does not correctly output pitch, azimuth, or roll.  It outputs 0.0, -0.0, -0.0 for the last three textviews, respectively.
Please restore my sanity by helping me    
switch (event.sensor.getType()) {
            case Sensor.TYPE_ACCELEROMETER:
                accelerometerValues = event.values.clone();
            case Sensor.TYPE_MAGNETIC_FIELD:
                geomagneticMatrix = event.values.clone();
                sensorReady = true;
                break;
            default:
                break;
        }   
        if (geomagneticMatrix != null && accelerometerValues != null && sensorReady) {
            sensorReady = false;
            float[] R = new float[16];
            float[] I = new float[16];
            SensorManager.getRotationMatrix(R, I, accelerometerValues, geomagneticMatrix);
            float[] actual_orientation = new float[3];
            SensorManager.getOrientation(R, actual_orientation);
            tvXCoordinate.setText(accelerometerValues[0] + "");
            tvYCoordinate.setText(accelerometerValues[1] + "");
            tvZCoordinate.setText(accelerometerValues[2] + "");
            floatXTotal += accelerometerValues[0];
            tvXTotal.setText(floatXTotal + "");
            tvAzimuth.setText(actual_orientation[0] + "");
            tvPitch.setText(actual_orientation[1] + "");
            tvRoll.setText(actual_orientation[2] + "");
        }