Android TextFieldType.INPUT for digits only!

Hello,

i've created a textField with TextFieldType.INPUT and restricted it to all digits.

Example:

textField=new TextField();

textField.type=TextFieldType.INPUT;

textField.restrict="1234567890";

Now i want to know, if it is possible, to set this field as "digits only". If i tap on the textField in my Emulator or my android device, the standart virtual QWERTY keyboard appears. I want to know if it is possibel to set the field to a "digit field", that the "digit only" keyboard appears to the user.  Something like the keyboard that appears if i want to call someone.