Kronos - NTP plugin for Flutter
Unlike the device clock, the time reported by Kronos is unaffected when the local time is changed while your app is running. Instead, Kronos stores accurate time along with a delta between the NTP time and the system uptime. Since uptime increases monotonically, Kronos isn't affected by device time changes. Accessing KronosClock.getCurrentTimeMs() will return the local time based on the last known accurate time + delta since last sync.
This plugin is based on Kronos in iOS and Kronos-Android in android for the whole SNTP protocol implementation.
Installation
Just add flutter_kronos as a dependency in your pubspec.yaml file.
Android
Add the following permission in your Android Manifest file:
"><uses-permission android:name="android.permission.INTERNET"/>
Usage
Sync clock using a pool of NTP servers
Calling Clock.sync will fire a bunch of NTP requests to up to 5 of the servers on the given NTP pool. As soon as we get the first response, the given closure is called but the Clock will keep trying to get a more accurate response.
KronosClock.sync();
Get an NTP time
KronosClock.getCurrentTimeMs(); //return time from the fallback clock if Kronos has not yet been synced
KronosClock.getCurrentNtpTimeMs(); //return null if Kronos has not yet been synced
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