android: checksum for string

Does anyone know an easy way to generate a checksum for a String on an Android? I have a NMEA sentence I have gener开发者_高级运维ated in a String class and it is ready to be sent, but it needs a checksum to be appended.

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http://developer.android.com/reference/java/util/zip/CRC32.html

Standard java way for checksums. I guess this should be useful