I was confused related ICU4J , if i want to upgrade my application version to Support Android N . How can i migrate from previous Android SDK to Android ICU API . For Example if i have used Calendar in my Application Using java.util.Calendar , will i implement that again with Android ICU API ? or there is shortest way ?
you don't have to implement that again for android N. but just change way of use.
explained in documentation
Migrating to android.icu APIs from other Android SDK APIs
use android.icu.util.Calendar instead of java.util.Calendar
for support older version then Android N you have to add ICU4J libraries