Android, calculating SHA-1 hash from file, fastest algorithm

Question

I have a problem with SHA-1 performance on Android. In C# I get calculated hash in about 3s, same calculation for Android takes about 75s. I think the problem is in reading oper

Answer 1

If I were you I would use the JNI like this guy did and get the speed up that way. This is exactly what the C interface was made for.

Answer 2

I tested it on my SGS (i9000) and it took 0.806s to generate the hash for a 10.1MB file.

Only difference is that in my code i am using BufferedInputStream in addition to the FileInputStream and the hex conversion library found at:

http://apachejava.blogspot.com/2011/02/hexconversions-convert-string-byte-byte.html

Also I would suggest that you close your file input stream in a finally clause