According to VentureBeat, Google is replacing its homegrown implementation of Java APIs in Android with Oracle's open-source OpenJDK. Google's Narayan Kamath let the cat out of the bag by making some interesting additions to the Android source code tree, under the label "Initial import of OpenJdk files." Google itself then confirmed the move to VentureBeat with the following statement:
"In our upcoming release of Android, we plan to move Android’s Java language libraries to an OpenJDK-based approach, creating a common code base for developers to build apps and services. Google has long worked with and contributed to the OpenJDK community, and we look forward to making even more contributions to the OpenJDK project in the future."
When asked about the reason for the change, Google said that with the release of Java 8, it wants to put more resources into OpenJDK, where its team can have a bigger impact on development. Like any other open-source contributor, Google will share its improvements to OpenJDK with the community, as well.
Google could be making this move because of a US federal court ruling that concluded Oracle could copyright the "structure, sequence, and organization" of its Java API. This move could be seen as an attempt to shield both Google and Android from future legal action related to the company's implementation of Java features in its mobile OS.