code.setText(savedcode);

code.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) {
                    Toast.makeText(Verification.this, "New Input" , Toast.LENGTH_SHORT ).show();
                }

                @Override
                public void afterTextChanged(Editable editable) {

                }
            });