Validation date in EditText for android while user is clicking

EditTextDateValidation.java

//SOURCE: http://stackoverflow.com/questions/16889502/how-to-mask-an-edittext-to-show-the-dd-mm-yyyy-date-format




EditText date;
date = (EditText)findViewById(R.id.whichdate);
date.addTextChangedListener(tw);
TextWatcher tw = new TextWatcher() {
    private String current = "";
    private String ddmmyyyy = "DDMMYYYY";
    private Calendar cal = Calendar.getInstance();
When user changes text of the EditText

    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {
        if (!s.toString().equals(current)) {
            String clean = s.toString().replaceAll("[^\\d.]", "");
            String cleanC = current.replaceAll("[^\\d.]", "");

            int cl = clean.length();
            int sel = cl;
            for (int i = 2; i <= cl && i < 6; i += 2) {
                sel++;
            }
            //Fix for pressing delete next to a forward slash
            if (clean.equals(cleanC)) sel--;

            if (clean.length() < 8){
               clean = clean + ddmmyyyy.substring(clean.length());
            }else{
               //This part makes sure that when we finish entering numbers
               //the date is correct, fixing it otherwise
               int day  = Integer.parseInt(clean.substring(0,2));
               int mon  = Integer.parseInt(clean.substring(2,4));
               int year = Integer.parseInt(clean.substring(4,8));

               if(mon > 12) mon = 12;
               cal.set(Calendar.MONTH, mon-1);
               year = (year<1900)?1900:(year>2100)?2100:year;
               cal.set(Calendar.YEAR, year); 
               // ^ first set year for the line below to work correctly
               //with leap years - otherwise, date e.g. 29/02/2012
               //would be automatically corrected to 28/02/2012 

               day = (day > cal.getActualMaximum(Calendar.DATE))? cal.getActualMaximum(Calendar.DATE):day;
               clean = String.format("%02d%02d%02d",day, mon, year);
            }

            clean = String.format("%s/%s/%s", clean.substring(0, 2),
                clean.substring(2, 4),
                clean.substring(4, 8));

            sel = sel < 0 ? 0 : sel;
            current = clean;
            date.setText(current);
            date.setSelection(sel < current.length() ? sel : current.length());
        }
    }
We also implement the other two functions because we have to

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

    @Override
    public void afterTextChanged(Editable s) {}
};

when one character in middle is deleted cursor deletes the last character.how to fix this?

when one character in middle is deleted cursor deletes the last character.how to fix this?

did you find solution ? if yes plz share..

hello can u add hour and minute? like dd/mm/yyyy hh:mm.
thank u

TDD Academy is building a SSN TextWatcher which uses the same approach, but they are doing it by adding unit tests. @premspal @hemapanjakshram we'll defiantly fix that bug.
https://www.twitch.tv/tddacademy
https://m.youtube.com/channel/UCU1U6oPscxzKd_IWAIOm60w

The repo is at: https://github.com/lancerkind/Android-TDD-SSNTextBox/tree/usingOnTextChanged

Regardless of the bug, the above code is pretty close. Thanks for sharing!