If you're looking for a simple way to transliterate Hindi text into English without relying on APIs like Google's Translate API, you might find an online solution helpful for prototyping or understanding the transliteration process.

Check out the Hindi-to-English Transliteration Tool. It transliterates Hindi text into its phonetic English equivalent, for example:

"आपका स्वागत है" → "aapka swagat hain" While this is a web-based solution, it can give you insights into how transliteration logic works. If you're looking to implement this in your Android app, you could create a similar mapping system where each Hindi character or syllable is matched to its English phonetic equivalent.

For a library-based solution, you can explore ICU4J (International Components for Unicode for Java). It provides support for transliteration, but it might require custom configuration for Hindi-to-English.