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2014/10/16 ¤W¤È 08:22:10
android Programming Glossary: readingsHow to get the rotation between accelerometer's axis and motion vector? http://stackoverflow.com/questions/10207044/how-to-get-the-rotation-between-accelerometers-axis-and-motion-vector enlighten me about a method to compute the accelerometer readings to turn them into rotation angles or a matrix . Such a method..
Android Accelerometer Profiling http://stackoverflow.com/questions/16392142/android-accelerometer-profiling of its internal methodology of splitting the accelerometer readings into gravity and the acceleration that's not due to gravity... when I was building my pedometer. The graphs shows the readings measured when I walked for 100 steps. The green line is sqrt..
http://stackoverflow.com/questions/2011543/android-why-are-methods-for-getting-neighboring-cell-signal-strengths-better-th method it works much better. The signal strength readings from neighboring cells change frequently and they have much..
http://stackoverflow.com/questions/2143102/accelerometer-stops-delivering-samples-when-the-screen-is-off-on-droid-nexus-one onSensorChanged SensorEvent event accelerometer sensor readings on Android. I would like to be able to record these sensor readings.. on Android. I would like to be able to record these sensor readings even when the device is off I'm careful with battery life and..
How to calculate distance based on phone acceleration http://stackoverflow.com/questions/4329164/how-to-calculate-distance-based-on-phone-acceleration them that is obvious but it also changes values in between readings. Every value we miss affects our accuracy so it is important.. clarify what's happening given the following acceleration readings 9m s s 3m s s 0m s s 0m s s 0m s s 5m s s 7m s s assuming an..
Android Compass orientation on unreliable (Low pass filter) http://stackoverflow.com/questions/4699417/android-compass-orientation-on-unreliable-low-pass-filter is close to things that can affect the magneticfield readings. But this is not the only reason it seems. I tried downloading.. the 3D compass and Compass remains extremely steady in its readings when setting the noise filter up i would like the same behavior.. in my application. I read that i can tweak the noise of my readings by adding a Low pass filter but i have no idea how to implement..
Android accelerometer accuracy (Inertial navigation) http://stackoverflow.com/questions/7829097/android-accelerometer-accuracy-inertial-navigation the accelerometer accuracy and constant fluctuation of readings. To start with I set the phone on a flat surface and sampled.. the phone on a flat surface and sampled 1000 accelerometer readings in the X and Y directions parallel to the table so no gravity.. gravity acting in these directions . I then averaged these readings and used this value to calibrate the phone subtracting this..
Rotating an ImageView like a compass (with the “north pole” set elsewhere) http://stackoverflow.com/questions/7978618/rotating-an-imageview-like-a-compass-with-the-north-pole-set-elsewhere much appreciated as I don't quite know how to proceed. The readings I'm getting while trying it out is somewhat inaccurate and points..
Android: How to get accurate altitude? http://stackoverflow.com/questions/9361870/android-how-to-get-accurate-altitude data structure to remember the last few I used 4 altitude readings and compute the average. This sufficed to get a relatively accurate..
How to get the rotation between accelerometer's axis and motion vector? http://stackoverflow.com/questions/10207044/how-to-get-the-rotation-between-accelerometers-axis-and-motion-vector motion heading. This is why I would like to know if you could enlighten me about a method to compute the accelerometer readings to turn them into rotation angles or a matrix . Such a method has to avoid integrating the acceleration even once as the..
Android Accelerometer Profiling http://stackoverflow.com/questions/16392142/android-accelerometer-profiling and TYPE_LINEAR_ACCELERATION which are the results of its internal methodology of splitting the accelerometer readings into gravity and the acceleration that's not due to gravity. Given that you're interested in the acceleration due to activities.. X X Y Y Z Z from Sensor.TYPE_ ACCELEROMETER which I recorded when I was building my pedometer. The graphs shows the readings measured when I walked for 100 steps. The green line is sqrt X X Y Y Z Z the blue line is an exponentially weighted moving..
http://stackoverflow.com/questions/2011543/android-why-are-methods-for-getting-neighboring-cell-signal-strengths-better-th coarse but when I use the TelephonyManager's getNeighboringCellInfo method it works much better. The signal strength readings from neighboring cells change frequently and they have much better resolution. So how can I get the current cell signal..
http://stackoverflow.com/questions/2143102/accelerometer-stops-delivering-samples-when-the-screen-is-off-on-droid-nexus-one a WakeLock I have some code that extends a service and records onSensorChanged SensorEvent event accelerometer sensor readings on Android. I would like to be able to record these sensor readings even when the device is off I'm careful with battery.. SensorEvent event accelerometer sensor readings on Android. I would like to be able to record these sensor readings even when the device is off I'm careful with battery life and it's made obvious when it's running . While the screen is..
How to calculate distance based on phone acceleration http://stackoverflow.com/questions/4329164/how-to-calculate-distance-based-on-phone-acceleration mean that the values are different each time you read them that is obvious but it also changes values in between readings. Every value we miss affects our accuracy so it is important to read the values as often as possible. Now the good news.. valus. Anyway here's an example with real world units to clarify what's happening given the following acceleration readings 9m s s 3m s s 0m s s 0m s s 0m s s 5m s s 7m s s assuming an 80ms sample rate we can derive the following velocities 0.72m..
Android Compass orientation on unreliable (Low pass filter) http://stackoverflow.com/questions/4699417/android-compass-orientation-on-unreliable-low-pass-filter the degrees change I read that this can be because my device is close to things that can affect the magneticfield readings. But this is not the only reason it seems. I tried downloading some applications and found that the 3D compass and Compass.. seems. I tried downloading some applications and found that the 3D compass and Compass remains extremely steady in its readings when setting the noise filter up i would like the same behavior in my application. I read that i can tweak the noise of.. setting the noise filter up i would like the same behavior in my application. I read that i can tweak the noise of my readings by adding a Low pass filter but i have no idea how to implement this because of my lack of Math . Im hoping someone can..
Android accelerometer accuracy (Inertial navigation) http://stackoverflow.com/questions/7829097/android-accelerometer-accuracy-inertial-navigation System for an Android phone which I realise is hard given the accelerometer accuracy and constant fluctuation of readings. To start with I set the phone on a flat surface and sampled 1000 accelerometer readings in the X and Y directions parallel.. and constant fluctuation of readings. To start with I set the phone on a flat surface and sampled 1000 accelerometer readings in the X and Y directions parallel to the table so no gravity acting in these directions . I then averaged these readings.. in the X and Y directions parallel to the table so no gravity acting in these directions . I then averaged these readings and used this value to calibrate the phone subtracting this value from each subsequent reading . I then tested the system..
Rotating an ImageView like a compass (with the “north pole” set elsewhere) http://stackoverflow.com/questions/7978618/rotating-an-imageview-like-a-compass-with-the-north-pole-set-elsewhere imageView.setScaleType ScaleType.CENTER Any help would be much appreciated as I don't quite know how to proceed. The readings I'm getting while trying it out is somewhat inaccurate and points in the wrong direction. Am I doing something really off..
Android: How to get accurate altitude? http://stackoverflow.com/questions/9361870/android-how-to-get-accurate-altitude is to filter the altitude data. I used a circular array data structure to remember the last few I used 4 altitude readings and compute the average. This sufficed to get a relatively accurate reading of vertical speed for my application. share..
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