getElapsedRealtimeNanos

Return the time of this fix, in nanoseconds of elapsed real-time since system boot.

This value can be reliably compared to SystemClock.elapsedRealtimeNanos(), to calculate the age of a fix and to compare location fixes. This is reliable because elapsed real-time is guaranteed monotonic for each system boot and continues to increment even when the system is in deep sleep (unlike getTime().

All locations generated by the LocationManager are guaranteed to have a valid elapsed real-time.

NOTE: On API levels below 17, this method will attempt to provide an elapsed realtime based on the difference between system time and the location time. This should be taken as a best "guess" at what the elapsed realtime might have been, but if the clock used for location derivation is different from the system clock, the results may be inaccurate.