For the release OkHttp 3.13 I’d like to change our requirements from this:

• Android 2.3+ (released December 6, 2010)
• Java 7+ (released July 2011)

To this:

• Android 5.0+ (released November 12, 2014)
• Java 8+ (released March 2014)

These minimums ensure our TLS stack supports both TLSv1.2 and ALPN. Requiring TLSv1.2 is important because we’re soon going to disable TLSv1.0 and TLSv1.1 by default!

I think we want to ship Java 8 bytecode and use lambas and method references. Downstream Android applications may need to enable desugaring in D8 when building APKs.

We should avoid hard requirements on Java 8 APIs (java.time). We will instead continue to offer them as convenience overloads. Java 8 APIs aren’t available until API 26 (released August 2017).