Simple Network Time Protocol client for Java and Android.

Main methods

• SNTP.setClient() initializes global static SNTPClient
• SNTP.setCache() initializes global static SNTPCache
• SNTP.currentTimeMillis() returns current global time. It may use netorking and can throw IOException. Do not call it on main event thread.
• SNTP.safeCurrentTimeMillis() same as above but will not throw anything and will use System.currentTimeMillis() as fallback.

Using on Android

In your build.gradle:

repositories {
    maven { url 'https://raw.githubusercontent.com/eterverda/sntp/m2/' }
}
dependencies {
    compile 'io.github.eterverda.sntp:sntp-android:0.2.2'
}

In onCreate of your application:

SNTP.setClient(AndroidSNTPClientFactory.create());
SNTP.setCache(AndroidSNTPCacheFactory.create(this));

... or you can extend SNTPApplication.

In your AndroidManifest.xml add:

<receiver
    android:name="io.github.eterverda.sntp.android.SNTPResetCacheReceiver"
    android:exported="true">

    <intent-filter>
        <action android:name="android.intent.action.TIME_SET"/>
    </intent-filter>
</receiver>

... to reset SNTP cache when user changes time in phone settings.

Using in Java project

In build.gradle of your Java project:

repositories {
    maven { url 'https://raw.githubusercontent.com/eterverda/sntp/m2/' }
}

dependencies {
    compile 'io.github.eterverda.sntp:sntp:0.2.2'
}

Somehere on startup of application:

SNTP.init()

... however this will not create persistent SNTP cache. If you need one replace SNTP.init() with:

SNTP.setClient(SNTPClientBuilder.create());
SNTP.setCache(SNTPCacheBuilder.custom().setFile(sntpCacheFile).build());