set length character Emoji Edittext Android Kotlin

Question

i have 1 edittext maxLength = 30, but i can only type 6 character emoji dog => 1 emoji dog = 6 regular character. So please help me type 30 emoji dog. Thanks everyone.
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Answer 1

editText.addTextChangedListener(object : TextWatcher {
            override fun beforeTextChanged(charSequence: CharSequence, i: Int, i1: Int, i2: Int) {
                oldTextString = charSequence.toString()
            }

            override fun onTextChanged(charSequence: CharSequence, i: Int, i1: Int, i2: Int) {}
            override fun afterTextChanged(editable: Editable) {
                var newTextString = editable.toString()
                if (!oldTextString.equals(newTextString)) {
                    if (Character.codePointCount(
                            newTextString,
                            0,
                            newTextString.length
                        ) > maxCharactersAllowed
                    ) {
                        newTextString = oldTextString
                    }
                    editText.setText(newTextString)
                    editText.setSelection(newTextString.length)
                }
            }
        })