How to vibrate the phone in sync with the ringtone?

Question

I want to vibrate the phone in the same way as the incoming call in sync with the ringtone. How do I achieve it?

Answer 1

• Get an MP3 library that gives you feedback for magnitude of sound (Something like equalizer in winamp)
• Normalize this magnitude to a scale of [0,1]
• As the android vibrator api supports only vibration duration (not intensity) you need to discretize this magnitude to either 0 or 1 (for some small duration).
• If the magnitude of sound is less than some value, 0.5, do not vibrate for that duration. Else vibrate.