Although Java is an important language for Android developers, it's one among many. Knowing additional languages is useful for Android developers, engineer Ernest Holloway explains in our latest Ask a Dev video.
Some applications may have demands that can be better tackled through alternative languages, he says.
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For example, advanced animations and applications that depend on hardware features could benefit from the native approach. But for companies that want a single codebase to be distributed across multiple platforms, HTML5 or CCS3 may make more sense.
The video above also discusses the differences in user experience between web and native approaches.
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