Android :: Implemented An Android Shake Detector That Works Well On Most Phones?

Has anyone implemented an Android Shake Detector that works well on most phones?I thought it would be fairly simple to implement but I keep getting false results. Basically, what I'm doing is setting up a sensor Listener, checking to make sure it is a SensorManager.SENSOR_ACCELEROMETER event, then only checking the event if the last event I received was more than 50 milliseconds ago (to try to reduce the amount of checking I do).Then I look for 3 "Shakes" within 4 seconds.A "Shake" to me being a speed reading of over 1000 followed by a speed reading of less than 400 within 1 second. If I don't get three "Shakes" within 4 seconds then the counter is reset to zero.At times it seems to work well but I continue to have instances where I just pick up the phone, and it triggers all three shakes, which makes very little sense to me because at other times, I can physically shake the phone quite hard, and not trigger all three shakes.As I said.. it works about 90% of the time correctly, but a 10% error rate is making the feature I want to implement useless.