> Hello all,
>
> I'm using a HTC Magic in order to develop an application which makes
> use of the accelerometer. Following the indications from tutorials and
> the docs, this is a snapshot of the code I'm using:
>
> /* Next code register the ACCELEROMETER SENSOR*/
> SensorManager mSensorManager = (SensorManager) getSystemService
> (Context.SENSOR_SERVICE);
>
> List<Sensor> listSensors = mSensorManager.getSensorList
> (Sensor.TYPE_ACCELEROMETER);
> Sensor acelerometerSensor = listSensors.get(0);
> mSensorManager.registerListener(this, acelerometerSensor,
> SensorManager.SENSOR_DELAY_UI);
>
> /*OnSensorChanged Method, here I receive the wrong values*/
> public void onSensorChanged(SensorEvent event) {
> // TODO Auto-generated method stub
> synchronized (this) {
> switch(event.sensor.getType()) {
> case Sensor.TYPE_ACCELEROMETER:
> for (int i=0 ; i<3 ; i++) {
> mAccelerometerValues[i] =
> event.values[i];
> }
> if ( mAccelerometerValues[0] >= 1)
> //selectAndChange() send some HTTP
> Petitions and updates the screen
> selectAndChange(0, null,"",3);
> else if ( mAccelerometerValues[0] <= -1)
>
> [...]
>
> default:
> }
>
> }
> }
>
> I'm nevermind getting values that don't match with the accelerometer.
> With the phone standing over my table, with no movement, I get values
> like:
>
> [0,0,15]
> [0,6,8]
> [0,0,0]
>
> And sometimes the expected value:
> [0,9.8,0]
>
> I guess my SensorManager is kind of mixing all the other sensors, but
> I do not guess where the problem could be. I have been checking other
> codes, and in all of them the estructure is aproximately the same.
>
> Any clues of what could I try?
Rather than:
Sensor acelerometerSensor = listSensors.get(0);
mSensorManager.registerListener(this, acelerometerSensor,
SensorManager.SENSOR_DELAY_UI);
try:
mSensorManager.registerListener(this,
mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
SensorManager.SENSOR_DELAY_UI);
This may not help, but it is safer code than just assuming get(0) will
give you the best accelerometer.
Also, have you checked around your table for a black hole, neutron star,
or any other strong gravitational source that might affect your readings?
:-)
--
Mark Murphy (a Commons Guy)
http://commonsware.com
Android App Developer Books: http://commonsware.com/books.html
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