Determining the duration and format of an audio file

Question

Given a path (on the SD card) to an audio file, what is the best way of determining the length of the audio in milliseconds and the file format (or Internet media type)?

(For the duration one could use MediaPlayer's getDuration-method, but this seems too slow/clumsy.)

Answer 1

For the length of the audio file:

File yourFile;
MediaPlayer mp = new MediaPlayer();
FileInputStream fs;
FileDescriptor fd;
fs = new FileInputStream(yourFile);
fd = fs.getFD();
mp.setDataSource(fd);
mp.prepare(); 
int length = mp.getDuration();
mp.release();

Check this for MimeType: https://stackoverflow.com/a/8591230/3937699