title: Android getAccelerometer Values
body: <p>Im trying to have a better understanding of Values given by getAccelerometer. So I made a log report of X,Y and Z axis.
  my first question is why this values are not initialized 0 ?
  because when the device is left on the table the following values are produced:</p>
  
  <pre><code>09-07 21:25:00.929: V/SERVICE:X, Y, Z:(22548): -0.48858398,0.6706055,,10.768008
  09-07 21:25:01.079: V/SERVICE:X, Y, Z:(22548): -0.4790039,0.68018556,,10.787168
  09-07 21:25:01.279: V/SERVICE:X, Y, Z:(22548): -0.48858398,0.6610254,,10.787168
  09-07 21:25:01.479: V/SERVICE:X, Y, Z:(22548): -0.45984375,0.6706055,,10.777588
  09-07 21:25:01.679: V/SERVICE:X, Y, Z:(22548): -0.4790039,0.6610254,,10.796748
  09-07 21:25:01.879: V/SERVICE:X, Y, Z:(22548): -0.4790039,0.6610254,,10.806328
  09-07 21:25:02.084: V/SERVICE:X, Y, Z:(22548): -0.4790039,0.6706055,,10.796748
  09-07 21:25:02.284: V/SERVICE:X, Y, Z:(22548): -0.46942383,0.68018556,,10.796748
  09-07 21:25:02.479: V/SERVICE:X, Y, Z:(22548): -0.48858398,0.6610254,,10.787168
  </code></pre>
  
  <p>my second question is why everybody keep telling me I can not calculate a few meter movement of device by calculating A=From getAccelerometer and T= time from event occurring.
  where is the problem that I m not considering ?
  thanks</p>