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W1ll
Asked: 2020-03-09 07:46:32 +0800 CST 2020-03-09 07:46:32 +0800 CST

How to automatically insert period in an EditText in Android

  • 772

I am using this code so that it only accepts IP addresses in the EditText, but I would like that if I enter more than three digits it will automatically insert the period, could someone tell me how to do this?

InputFilter[] filters = new InputFilter[1];
    filters[0] = new InputFilter() {
        @Override
        public CharSequence filter(CharSequence source, int start, int end,android.text.Spanned dest, int dstart, int dend) {
            if (end > start) {
                String destTxt = dest.toString();
                String resultingTxt = destTxt.substring( 0, dstart ) + source.subSequence( start, end ) + destTxt.substring( dend );
                if (!resultingTxt.matches( "^\\d{1,3}(\\.(\\d{1,3}(\\.(\\d{1,3}(\\.(\\d{1,3})?)?)?)?)?)?" )) {
                    return "";
                } else {
                    String[] splits = resultingTxt.split( "\\." );
                    for (int i = 0; i < splits.length; i++) {
                        if (Integer.valueOf( splits[i] ) > 255) {
                            return "";
                        }
                    }
                }
            }
            return null;
        }
    };
    ipAddress.setFilters( filters );
android

1 Answers

  1. Best Answer

    The option for you to EditTextaccept IP address type inputs is precisely how you are doing it, by means of a InputFilter.

    You must accept up to 3 digits for each segment and period.

    example:

        EditText editText = (EditText)findViewById(R.id.editText);

    //Create InputFilter
    InputFilter[] filters = new InputFilter[1];
    filters[0] = new InputFilter() {
        @Override
        public CharSequence filter(CharSequence source, int start, int end,
                                   android.text.Spanned dest, int dstart, int dend) {
            if (end > start) {
                String destText = dest.toString();
                String resultingText = destText.substring(0, dstart) + source.subSequence(start, end) + destText.substring(dend);
                if (!resultingText.matches("^\\d{1,3}(\\.(\\d{1,3}(\\.(\\d{1,3}(\\.(\\d{1,3})?)?)?)?)?)?")) {
                    return "";
                } else {
                    String[] splits = resultingText.split("\\.");
                    for (int i = 0; i < splits.length; i++) {
                        if (Integer.valueOf(splits[i]) > 255) {
                            return "";
                        }
                    }
                }
            }
            return null;
        }
    };

    //Apply filter!
    editText.setFilters(filters);

    enter image description here

    • 1