how to check not Digit Only android studio? [duplicate]

Question

I need to show an error if inputs in edit Text are any thing except numbers. I tried this code but it seems incorrect and does not work.

if(!EditText.text.isDigitsOnly()){
      EditText.error = "myError"
   }

I know about android:inputType="number" but I should not use it. I can use a loop to check it myself but I need a much cleaner way.

Answer 1

You can use Regex:

if ("[0-9]+".toRegex().matches(YOUR_STRING)) {
    // Only digits
}

Change YOUR_STRING to the string you wish to check.

Answer 2

You can use regex pattern and match,

val regexStr = "^[0-9]*$";

if(yourid.text.toString().trim().matches(regexStr))
{
    //contains only numbers
}
else{
    //contains other types too
}

This will be helpful when you are trying to validate only numbers.