无法解析android.net.SntpClient类

Question

I am trying to use the class SntpClient that should be in the android.net package, but Android Studio is telling me it cannot find it. Indeed when I look through the source jars (of both API 19 and API 21), the class is not there. However according to grepcode it should be.

http://grepcode.com/file/repository.grepcode.com/java/ext/com.google.android/android/4.4.4_r1/android/net/SntpClient.java

What am I doing wrong?

Answer 1

Google has chosen not to make all public classes available as part of the SDK. Visibility is controlled by the @hide comment tag as described here .

I'm not sure why they chose to hide SntpClient particularly, but provided you respect the terms of the Apache license you can copy the source into your application without much modification.