How to Apply the Textchange event on EditText

Question

I developed one simple app, like subtraction, addition. In this app I use three EditTexts, one for answer and other two for question. I want to calculate the answer of quest

Answer 1

For Kotlin use this below code

edit1.addTextChangedListener(object : TextWatcher {
   override fun onTextChanged(s: CharSequence, start: Int, before: Int, count: Int) {
       if (edit1.text.toString().length == 1) {
             edit2.requestFocus()
       }
   }

   override fun beforeTextChanged(s: CharSequence, start: Int, count: Int, after: Int
   ) {// TODO Auto-generated method stub
   }

   override fun afterTextChanged(s: Editable) {}
})