android-sensors

I'm experimenting with some Android functions. Right now, I'm trying to get the rotation angle of the device, so when I show a happy face bitmap on a canvas, it always looks "straight". All I would need for this, is to get the x-axis rotation angle (I guess) but I can't find how to achieve it. Hope you can help me. Thank you. There is azimuth, pitch and roll available to you. Not sure which one relates to your "x-axis" but I think its azimuth. Time for helpful links: http://www.workingfromhere.com/blog/2009/03/30/orientation-sensor-tips-in-android/ http://marakana.com/forums/android/examples

I need to get the updated device orientation, but I have to fix my activity to Portrait (which I did in the layout xml file), which prevents me from using this: int rotation = getWindowManager().getDefaultDisplay().getRotation(); because it always gives me the portrait rotation, So, I'm trying to rely on the sensors. I found that Sensor.TYPE_ORIENTATION is deprecated, so I'm using a combination of Sensor.TYPE_ACCELEROMETER & Sensor.TYPE_MAGNETIC_FIELD and here is the event listener: SensorEventListener sensorEventListener = new SensorEventListener() { float[] mGravity; float[] mGeomagnetic;

What I want to archieve is a sort of "magnetic fingerprint" of a location. I use the MAGNETIC_FIELD sensor and in the event I get the 3 values for the (unfortunately not further explained) X, Y and Z axis. Problem is, that the values change as I rotate the device, so I guess the 3 axis are relative to the device. What I'd need is to compensate the device rotation so that I get the same 3 values, regardless of how the device is rotated. I tried to multiply with the rotation matrix (I know how to get that), tried to multiply with the inclination matrix and so on, but nothing works. Regardless of

Specific scenario to avoid problems: Behaviour for Activity in Samsung devices was different in the manner that every time there was a change detected, for proximity, it resulted in a call to onPause()/onResume() ONLY on SAMSUNG devices. I was clearing the proximity sensors in onPause() which resulted in a behaviour unique to Samsung devices. Hope this saves some time for anybody who's facing this. I removed the call of clearing proximity listeners from onPause() and now it works as expected on the mentioned devices. UPDATE: What is mentioned below is not the only issue, the proximity sensor

I have been working on a small compass app the past couple of days, and have gotten the code up and running, but it seems that the compass reading is not accurate. After calibrating both phones, my first test that i found this in what that i simply held the phone against and flat surface looked at the reading then flipped it horizontally and put it against the same flat surface (a 180* turn) and the value did not change 180* it was closer to 240*. I then tested the reading vs a compass, at times the reading seemed to be close but at other points it was more than 50* off. I even tried to put my

my android application shows the direction of a particular place in the world and therefore in needs to get the compass degree. This is the code I've been using to calculate the degrees: public void getDirection() { mySensorManager = (SensorManager)getSystemService(Context.SENSOR_SERVICE); List<Sensor> mySensors = mySensorManager.getSensorList(Sensor.TYPE_ORIENTATION); if(mySensors.size() > 0){ mySensorManager.registerListener(mySensorEventListener, mySensors.get(0), SensorManager.SENSOR_DELAY_UI); } else{ TextView alert = (TextView)findViewById(R.id.instruct); alert.setText(getString(R.string