restrict android EditText for a particular word

Question

hey i want to restrict my edittext input ..i want that user cannot add any & into the edittext..is it possible? if yes please help... here is my edit text code..

EditText descriptions = new EditText(this);
        allEds.add(descriptions);
        descriptions.setHint("Descriptions");
        descriptions.setInputType(InputType.TYPE_CLASS_TEXT);
        if("0".equals(partial_check)){ descriptions.setEnabled(true); }else{ descriptions.setEnabled(false); }
        linearLayout.addView(descriptions);

onTextchanged Listener can do the job for you. Check substring on every text entered. — Jibran Khan, Jan 15 '14 at 07:31

score 1 · Accepted Answer · answered Jan 15 '14 at 07:41

descriptions.addTextChangedListener(new TextWatcher() {

        @Override
        public void onTextChanged(CharSequence s, int start, int before,
                int count) {
        if (s.length() > 0) {
            if (s.charAt(s.length() - 1) == '&') {
              descriptions.setText(s.subSequence(0, s.length() - 1));
              descriptions.setSelection(s.length() - 1);
                }
            }
        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count,
                int after) {

        }

        @Override
        public void afterTextChanged(Editable s) {

        }
    });

score 0 · Answer 2 · edited May 23 '17 at 10:28

0

Use an edittext Ontextchanged listener for this. There check whether the current text contains an & character. If it does, remove it and reset the edittext with the string without the & character.

This link will give you some idea of the exact usage: Counting Chars in EditText Changed Listener

edited May 23 '17 at 10:28

Community

1
1

answered Jan 15 '14 at 07:26

SoulRayder

5,072
6
47
93

Ranjit · Answer 3 · 2014-01-15T07:37:45.743

As Gautham said use OntextChangedListener for this kind of problem which will check each letter after insertion and help you to restrict. Something like:

        descriptions .addTextChangedListener(new TextWatcher() {

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {

        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count,
                int after) {

        }

        @Override
        public void afterTextChanged(Editable s) {
            //restrict the word here...

        }
    });

For some extra information about ontextChanged and TextWatcher Tutorial and also the Documentation.

score 0 · Answer 4 · answered Jan 15 '14 at 08:02

I did it like by using input filter, you can change it to your needs

InputFilter filter= new InputFilter() {
    public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
        for (int i = start; i < end; i++) {
            String checkMe = String.valueOf(source.charAt(i));

            Pattern pattern = Pattern.compile("[+0123456789]");
            Matcher matcher = pattern.matcher(checkMe);
            boolean valid = matcher.matches();
            if(!valid){
                Log.d("", "invalid");
                return "";
            }
        }
        return null;
    }
};

here "[+0123456789]" in the line Pattern pattern = Pattern.compile("[+0123456789]"); is what will be accepted.now for your edit text set this filter

yourEditTexy.setFilters(new InputFilter[]{filter});

restrict android EditText for a particular word

4 Answers4