how to set input type to be numberdecimal but also allow a “-”

Question

I have set input type to be numberdecimal but also want to populate the editText with a \"-\" programmatically. I can add the text but then I am unable to edit the text as it do

Answer 1

I managed to do that with:

android:inputType="number|numberSigned"    
android:digits="0123456789-"