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I am trying to plot the data of Light sensor from my Android smartphone using GraphView library. For the Data points' x-axis value I need the time at which the sensor gives its reading. What is the best way to get the most accurate sensor event time?

Marry35
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  • Possible duplicate of [Accelerometer SensorEvent timestamp](http://stackoverflow.com/questions/5500765/accelerometer-sensorevent-timestamp) – Madhukar Hebbar Sep 15 '16 at 12:22

2 Answers2

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@Override
    public void onSensorChanged(SensorEvent event) {
            event.timestamp // is the timestamp of event occurence

    }

event.timestamp is in nanosecons not miliseconds so be careful

Source

Karol Żygłowicz
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You can use sensorEvent.timestamp You will get the time in nanoseconds.
So, you can use this - 

(System.nanoTime() - sensorEvent.timestamp)/Math.pow(10,6)

to log the time in milliseconds!

CodeWalker
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  • I tried (System.nanoTime() - sensorEvent.timestamp)/1000000000L; to get time in seconds but it gives me negative numbers having 6 digits. – Marry35 Sep 15 '16 at 12:36