how to avoid characters like �‎ in an edittext?

Question

I have an issue when user try to enter text copied that this text sometimes contains some special characters like �

and this make JSON string to be not formated, so please how can I avoid user enter such characters

please take into consideration that user can enter Arabic text and English text only

Your json problem is probably unrelated to the char that are entered. Better show some code related to your problem if you want it solved. — Loïc Faure-Lacroix, Nov 28 '17 at 13:54
@LoïcFaure-Lacroix the JSON problem is not my side, it is server side, the server API crash when user enter such characters, so I do not have any codes for this problem, I just want to avoid any characters except [Arabic Alphabet, English Alphabet, Numbers] — Amira Elsayed Ismail, Nov 28 '17 at 13:56

dalla92 · Accepted Answer · 2017-11-28T15:34:21.783

3

Try using InputFilters on the Edittext:

InputFilter filter = new InputFilter() {
        @Override
        public CharSequence filter(CharSequence source, int start, int end,
                                   Spanned dest, int dstart, int dend) {
            StringBuilder stringBuilder = new StringBuilder();
            for (int i = start; i < end; i++) {
                if (isEnglishOrArabicChar(source.charAt(i))) {
                    stringBuilder.append(source.charAt(i));
                }
            }
            return stringBuilder.toString();
        }
    };
etName.setFilters(new InputFilter[]{filter});

private static boolean isEnglishOrArabicChar(char c) {
    Character.UnicodeBlock ub = Character.UnicodeBlock.of(c);
    return ub == Character.UnicodeBlock.ARABIC || ub==Character.UnicodeBlock.BASIC_LATIN;
}

Reference

edited Nov 28 '17 at 15:34

answered Nov 28 '17 at 14:14

dalla92

432
2
8

I have tried your code, the edittext is not accepting any characters – Amira Elsayed Ismail Nov 28 '17 at 14:41
Edited the code, the if condition was the opposite. Now it should work! – dalla92 Nov 28 '17 at 14:52
it is working now , but why can not I paste text to edittext ? – Amira Elsayed Ismail Nov 28 '17 at 15:24
I can paste text on my edittext which has the filter attached. Just long tap on the edittext and paste. – dalla92 Nov 28 '17 at 15:28
I did long press and when click paste, nothing happen and no text appear in my edittext , my android os is 7.0 and device type is Samsung s6 edge – Amira Elsayed Ismail Nov 28 '17 at 15:30
I edited again to fit your needs. Now I check char by char and build the result accordingly. Let me know if its working. – dalla92 Nov 28 '17 at 15:35

how to avoid characters like �‎ in an edittext?

1 Answers1