How to vibrate the phone for a certain time in android?

This code vibrates the phone for 1000 milliseconds. After getting the vibrator service with Context.getSystemService we call Vibrator.vibrate for a given time in milliseconds. 

Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);

// 1. Vibrate for 1000 milliseconds
long milliseconds = 1000;
v.vibrate(milliseconds);

// 2. Vibrate in a Pattern with 500ms on, 500ms off for 5 times
long[] pattern = { 500, 300 };
v.vibrate(pattern, 5);