keyboard is overlying the textfield

I am developing an app using titanium classic, I have a form with a lot of text fields, when I focus on the text field at the bottom, the keyboard is displayed and overylay on the text field so I don't see what I am writing, is there any solution so I show what is written on the textfield ?

my code is very simple

var formView = Ti.UI.createView({
    width : '100%',
    height : '100%',
    top : 0,
    contentWidth : 'auto',
    contentHeight : 'auto',
    scrollType : 'vertical',
    layout : 'vertical'
});
 
 
var tf_id = Titanium.UI.createTextField({
    color : '#336699',
    hintText : '????:  1017762087 ',
    textAlign : 'right',
    height : 35,
    top : 10,
    left : 20,
    width : 280,
    keyboardType : Titanium.UI.KEYBOARD_DEFAULT,
    returnKeyType : Titanium.UI.RETURNKEY_DEFAULT,
    borderStyle : Titanium.UI.INPUT_BORDERSTYLE_ROUNDED,
 
});
 
formView.add(tf_id);
complainForm.add(formView);