how to toast a message if editText is empty by clicking button?

Question

i have 2 edit Text in my application, 1 button to add the input numbers in the edit Text and 1 text view to display the result. I would like to put a toast message if my edit te

Answer 1

You can try this two function for string empty, not empty or null. It is simple return true or false. It is very use for all projects.

if(isEmpty(edittext.getText().toString())){
       // your Toast message if string is empty
}


if(isNotEmpty(edittext.getText().toString())){
      // your Toast message if string is not empty
}


 public static boolean isEmpty(String str) {

        if (str == null)
            return true;
        else if (str.toString().trim().length() == 0)
            return true;

        return false;
    }

    public static boolean isNotEmpty(String str) {

        if (str == null)
            return false;
        else if (str.toString().trim().length() == 0)
            return false;

        return true;
    }