I had a good laugh at this one. I could be wrong, but often when complex arithmetic code involving physical units fail and the code originates from the US it usually means one thing.. hint: Mars Climate Orbiter disaster (http://en.wikipedia.org/wiki/Mars_Climate_Orbiter).
The figure you mention (30) is consistent with g in Ye Olde Imperial Units of feet per micro-fortnight squared :-) J. On Jun 29, 2:58 pm, "House n @ MIT" <[email protected]> wrote: > Hello, > I've been doing some testing on the accelerometer, specifically with > the old SensorListener and new SensorEventListener versions available > as of Cupcake. > > Using SensorListener, I've been getting normal acceleration values as > expected according to the documentation - around 9.8 on the axis in > line with gravity when sitting still. When I upgraded the code to > SensorEventListener, that number jumped to around 30, which is not > consistent with the documentation. I've tried sampling at different > rates, but generally I've been using game mode, since that's the rate > I ultimately intend to use. > > I'd be interested to hear if anyone has seen this behavior, has any > ideas about it, or sees an issue with the code below. Give it a test > run yourself. It might be relevant to note that the > SensorEvent.accuracy is SENSOR_STATUS_ACCURACY_HIGH. > > When I run this code with the phone sitting flat on a table, screen, > up, I get values like these: > > x: 12.5625 y: 20.8125 z: -16.4375 > > //////////////////////////////////////////////////////////////////// > > package edu.accel; > > import java.io.File; > import java.io.FileNotFoundException; > import java.io.FileOutputStream; > import java.io.PrintWriter; > import java.util.List; > > import android.app.Activity; > import android.content.Context; > import android.hardware.Sensor; > import android.hardware.SensorEvent; > import android.hardware.SensorEventListener; > import android.hardware.SensorManager; > import android.os.Bundle; > > public class AccelTest extends Activity { > > private SensorManager mSensorManager; > > @Override > public void onCreate(Bundle savedInstanceState) { > super.onCreate(savedInstanceState); > setContentView(R.layout.main); > > // Set up the accelerometer reading > mSensorManager = (SensorManager)getSystemService > (Context.SENSOR_SERVICE); > // Get the list of all sensors, and find the accelerometer > within > List<Sensor> sensorList = mSensorManager.getSensorList > (SensorManager.SENSOR_ACCELEROMETER); > > mSensorManager.registerListener(mSensorListener, > sensorList.get(0), > SensorManager.SENSOR_DELAY_UI); > > } > > //Accelerometer > private final SensorEventListener mSensorListener = new > SensorEventListener() { > > private PrintWriter mCurrentFile; > > boolean never = true; > String comma = new String(","); > > public void runOnce() > { > //Creating a file to print the data into > > String nameStr = new String("/sdcard/10 second trials.xls"); > File outputFile = new File(nameStr); > mCurrentFile = null; > try { > mCurrentFile = new PrintWriter(new > FileOutputStream(outputFile)); > } catch (FileNotFoundException e) { > // TODO Auto-generated catch block > e.printStackTrace(); > } > > } > > @Override > public void onAccuracyChanged(Sensor sensor, int accuracy) { > // TODO Auto-generated method stub > > } > > @Override > public void onSensorChanged(SensorEvent event) { > > if (never) > { > never = false; > runOnce(); > } > StringBuffer buff = new StringBuffer(); > buff.append(String.valueOf(event.values[0])); > buff.append(comma); > buff.append(String.valueOf(event.values[1])); > buff.append(comma); > buff.append(String.valueOf(event.values[2])); > mCurrentFile.println(buff.toString()); > } > }; > > } > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
