How to calculate FrameLength without using AudioSystem?

I'm porting Java project to Android.

As you know, the Android does not have javax.sound package.

I need to calculate frameLength.

My sound file size is 283KB. And frame size is 4 and frame rate is 44100 and sample size in bits is 16.

The frame length was 69632 when I used just pure Java.

Do you know any equation to get this?

Thank you.

I'm sure Greg won't mind if I move this thread to our Android forum.