sensor

I have written a simple Activity which is a SensorEventListener for Sensor.TYPE_ACCELEROMETER . In my onSensorChanged(SensorEvent event) i just pick the values in X,Y,Z format and write them on to a file. Added to this X,Y,Z is a label, the label is specific to the activity i am performing. so its X,Y,Z,label Like this i obtain my activity profile. Would like to have suggestions on what operations to perform after data collection so as to remove noise and get the best data for an activity. The main intent of this data collection is to construct a user activity detection application using

I am now trying to create an app to monitoring the vibration. I use accelerometer to finish the job, when the recorded acceleration exceed certain threshold, I call it a trigger. When there's a trigger, I want to log the acceleration, magnetic field, light level data (from different sensors) at the trigger time to a file. The problem now is that: I can get data from individual sensor, but couldn't figure out a way how to get the data from multiple sensors at the same time. For example: I can set a sensorlistener to monitoring the change of accelerometer, when I record the acceleration data,

I am a new to Android development and I would like to create an application which shows the list of sensors on my Android device. I tried to find this but without the success. Can you please help me. Here is the solution how to do this: /////////////// List of Sensors ////////////////////////////// listeCapteurs = (ListView) findViewById(R.id.ListView01); SensorManager sensorManager= (SensorManager)getSystemService(Context.SENSOR_SERVICE); List<Sensor> listSensor= sensorManager.getSensorList(Sensor.TYPE_ALL); List<String> listSensorType = new ArrayList<String>(); for(int i=0; i<listSensor.size

With Which Sensor I Can Detect when device is moving to a direction In Absolute Coordinate(for example moving to +x or -x). I need accurate data,so i cannot use GPS . the Complete Task is to plot in paint(in computer) with android device sensors and this part of task in unknown for me. I'm a little confused about what you're asking. Do you want to put a device in your pocket and walk around, and make a plot of everywhere you walked? Or do you want to wave the device around in your hand like a 3-d mouse, for painting? For the latter, see Ali's suggestion above. If you want to do motion tracking

How can I get a direction vector representing the direction the back of the device is pointing relative to earth coordinates? For example, if place down on a desk (screen facing up) it should read [0,0,-1] and if held vertically facing north it should read [1,0,0], etc. I know how to calculate it from heading, pitch, and roll, as long as those are relative to earth coordinates. To be clear here I am not looking for angular velocity, but the actual current angle relative to the plane tangent to the earth. So if the device is held vertically and facing north, the angle "alpha" should read 0 or

I have very simple Android app: in activity I have a button and I start/stop the OrientationListener. However, after unregistering it, in ddms I can still see the thread android.hardware.SensorManager$SensorThread] (Running) . The registration code: sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE); List<Sensor> sensors = sensorManager.getSensorList(Sensor.TYPE_ORIENTATION); if (sensors.size() > 0) { sensor = sensors.get(0); running = sensorManager.registerListener(sensorEventListener, sensor, SensorManager.SENSOR_DELAY_FASTEST); } and unregistration: try { if