Hide Android soft keyboard and only allow digits on EditText

I have a custom keyboard and don't want to show the Android softkeyboard. this can be achieved by the following code (How to hide Android soft keyboard on EditText):

editText.setInputType(InputType.TYPE_NULL);

However the EditText should only allow digits. this can be achieved by:

editText.setInputType(InputType.TYPE_CLASS_NUMBER);

I can't seem to find a way to combine both functionalities. setting the inputtype to TYPE_NULL will allow non-numeric characters when using hardware keyboards and setting the inputtype to TYPE_CLASS_NUMBER causes the soft keyboard to pop up.

The answer from airowe guided me in the right direction. This solution didn't seem to work for Android 2.3.X devices (the soft keyboard would still pop up). So I tweaked it a bit. I ended up using the following code:

InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(editText.getWindowToken(), 0); //hide keyboard

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB)
{
   editText.setInputType(InputType.TYPE_CLASS_NUMBER);
}
else
{
   editText.setRawInputType(InputType.TYPE_NULL);
}

This would probably allow pre-honeycomb tablets to enter text. However I think this is negligible.