One of the biggest cheers from the crowd at I/O '17 came in response to Stephanie Saad Cuthbertson's announcement that Kotlin would be an officially supported language for Android development starting with Android Studio 3.0. If you're an AdMob or Doubleclick publisher who's been eager to make the leap to a new language, we've got another announcement you might like: now that the new version of Android Studio has launched, we've released bunch of new mobile ads resources to support the Kotlin community.

If you haven't seen Kotlin yet, it's a statically typed language developed by JetBrains that compiles down to the same JVM bytecode that Java does, but includes a number of new features that can make Android development faster and easier. Things like dedicated data classes with less boilerplate, the Elvis operator, lambdas, SAM conversion, explicit nullability for references, and lots of other modern language features come built-in. For more information, see Introduction to Kotlin (also from I/O '17) in which Andrey Breslav and Hadi Hariri code up examples of the language's best features:

When you're done, you can see those same features in action in our new developer resources, which are now available to the AdMob and Doubleclick publisher community.

Samples

The Mobile Ads DevRel team maintains a GitHub repository of Android samples covering our API, and we've pushed Kotlin versions for each ad format. If you been wondering how Kotlin's Android extensions work with AdMob's banner ad layouts, for example, we've got a new sample app that'll show you. If you're curious how native ads work with all the new nullability stuff, we've got you covered with Kotlin samples for those formats as well.

In addition, we've included a new version of our API Demo app, which features a navigation drawer full of individual API demos for things like banner sizes, category exclusions, and more, all in Kotlin.

Implementation Guides

We've also updated our publisher guides with Kotlin snippets wherever code is shown. Similar to the mobile ads guides for iOS (which show either Swift or Objective-C syntax with a click of a tab), the Android guides now let developers easily switch back and forth between Java and Kotlin implementations.

Questions?

If you take a look at the Kotlin guides and samples and find you've got questions about the best way to implement something in Android's first ever new language, stop by our support forum. Our staff there will be happy to help.

 - Andrew Brogdon, Mobile Ads Developer Relations

Current Ad Exchange Seller REST API users will need to migrate to the DoubleClick for Publishers API before July 26, 2018. This migration guide provides a mapping of each Ad Exchange reporting metric to its equivalent in the DFP API.

For more details about reporting in the DFP API, see the reporting guide.

For general assistance with the DFP API or your migration, reach out on our developer forum.

Why this is happening

As a part of our effort to provide a unified tool to manage your ad business and monetize your inventory, the DoubleClick for Publishers API now supports all of the features of the Ad Exchange Seller REST API. The DFP API is more robust and has more frequent updates.

What isn't changing

Users will not need to create new accounts. All Ad Exchange Seller users already have a DoubleClick for Publishers account.

No data is changing. The only change is how you programmatically access that data.

 - Chris Seeley, DFP API Team