accel.py

import android
import time
from math import sqrt

droid = android.Android()
droid.wakeLockAcquirePartial()

def main():
    while True:
        total = 0
        droid.startSensing()
        time.sleep(2)
        data = [0, 0, 0]
        for cnt in xrange(0, 10):
            of = data
            data = None
            while True:
                try:
                    data = droid.sensorsReadAccelerometer().result
                except:
                    pass
                if data is not None:
                    break
            time.sleep(1)
            if cnt == 0:
                continue
            
            df = [of[i] - data[i] for i in xrange(0,2)]
            total += sqrt(sum([d*d for d in df]))
        droid.stopSensing()
        prnt = "%s: %f" % (time.asctime(), total)
        with open('/sdcard/dropbox/accel.log', 'a') as out:
            out.write(unicode(prnt+"\n", "utf-8").encode("utf-8", "ignore"))
        print '.', 
        time.sleep(108)

if __name__ == "__main__":
    try:
        main()
    except Exception as inst:
        with open('/sdcard/dropbox/accel.err', 'a') as err:
            errstr = "%s: %s\n" % (time.asctime(), str(inst))
            err.write(unicode(str, "utf-8").encode("utf-8", "ignore"))
    finally:
        droid.wakeLockRelease()