Edit text for OTP with Each letter in separate positions

Question

I\'m working on a application which asks for OTP when user want to reset his password for which I need a text like the one in attached Image... What I thought to proceed wi

Answer 1

The below solution takes into consideration:

1. Auto focusing to the next edit text on entering one digit of OTP in the focussed edit text.

2. Auto focusing to the previous edit text on deleting one digit of OTP in the focussed edit text.

The combination of work in onTextChanged() and afterTextChanged() helps in achieving the same.

private EditText firstDigitOtpEdt, secondDigitOtpEdt, thirdDigitOtpEdt, fourthDigitOtpEdt;

firstDigitOtpEdt.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {

        }

        @Override
        public void afterTextChanged(Editable editable) {
            if (firstDigitOtpEdt.getText().toString().length() == 1) {
                secondDigitOtpEdt.requestFocus();
            }
        }
    });

secondDigitOtpEdt.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
            if (secondDigitOtpEdt.getText().toString().length() == 0) {
                firstDigitOtpEdt.requestFocus();
            }
        }

        @Override
        public void afterTextChanged(Editable editable) {
            if (secondDigitOtpEdt.getText().toString().length() == 1) {
                thirdDigitOtpEdt.requestFocus();
            }
        }
    });

thirdDigitOtpEdt.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
            if (thirdDigitOtpEdt.getText().toString().length() == 0) {
                secondDigitOtpEdt.requestFocus();
            }
        }

        @Override
        public void afterTextChanged(Editable editable) {
            if (thirdDigitOtpEdt.getText().toString().length() == 1) {
                fourthDigitOtpEdt.requestFocus();
            }
        }
    });

fourthDigitOtpEdt.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
            if (fourthDigitOtpEdt.getText().toString().length() == 0) {
                thirdDigitOtpEdt.requestFocus();
            }
        }

        @Override
        public void afterTextChanged(Editable editable) {
           // We can call api to verify the OTP here or on an explicit button click
        }
    });