How much time does it take for a keyboard to popup/hide?

I have animation for view moving when a keyboard shows/hides. I was trying to synchronize the animation with the time it takes the keyboard.

1. Is the time same on Android/IOS?
2. Dose it take same time for all Androids?

   var userNameTextField = Ti.UI.createTextField({
               borderStyle: Ti.UI.INPUT_BORDERSTYLE_ROUNDED,
               color: '#336699',
               top: 219, left: 10,
               width: 250, height: 60,
               editable: false
           });
    
           startWin.add(userNameTextField);
    
    
           userNameTextField.addEventListener('click', function() {
               userNameTextField.editable=true;
               var animation = Titanium.UI.createAnimation();
               animation.duration = 100;
               animation.top = -50;
               startWin.animate(animation);
               userNameTextField.focus();
           });
    
           userNameTextField.addEventListener('return', function(e) {
               var animation = Titanium.UI.createAnimation();
               animation.duration = 100;
               animation.top = 20;
               startWin.animate(animation);
           });