I have tried
editText.setText("");
however I get an error saying "" is not a valid integer. I have also tryed changing the input type to text setting the text to "" than changing the input type back to numbers but I get the same error.
Try this:
editText.setText("0", BufferType.EDITABLE); /*// May be unecessary... */
editText.getText().clear();
You may need to set the buffer type to BufferType.EDITABLE first...