Manually input date in edittext

Question

I want to manually (i.e. from the numeric keyboard) input date in dd-mm-yyyy format in an edittext field. Also to assign three integer variables, day, month, year for another calculation in such a way that the first two characters (i.e. index 0, 1) be the day variable then automatically add a separator ("-' or "/") then next two digit should be month variable then an automated separator like before and finally year. The day and month should display as two digit with leading zero (if necessary). Also if the user enter 4-9 in day field at index zero(0) it automatically convert it into two digit and move to month field, also for month 2-9 make that two digit and move to year. Finally when the input process completes move the cursor to next edittext field. I apologize for my poor English. Any kind of help will be appreciated. Thanks in advance.

Answer 1

You can use this. Certain edge cases are not handled. Do those.

 private static final char SEPERATOR = '-';

    private void automateDateEntry() {
        dateEditText.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) {
                if (charSequence.length() > 10) {
                    charSequence = charSequence.subSequence(0, 10);
                    dateEditText.removeTextChangedListener(this);
                    dateEditText.setText(charSequence);
                    dateEditText.addTextChangedListener(this);
                }
            }

            @Override
            public void afterTextChanged(Editable editable) {
                String currText = editable.toString();
                if(currText.isEmpty())
                    return;
                int separatorCount = getOcurrence(currText, SEPERATOR);

                if (currText.charAt(currText.length() - 1) == SEPERATOR) {
                    return;
                }
                int lastSeperatorPos = currText.lastIndexOf(SEPERATOR);
                String previousTxt = null;
                if (lastSeperatorPos > -1) {
                    previousTxt = currText.substring(0, lastSeperatorPos + 1);
                    Log.d("curr text", currText);
                    currText = currText.substring(lastSeperatorPos + 1);
                }

                if (!currText.isEmpty()) {
                    switch (separatorCount) {
                        case 0:
                            int date = Integer.parseInt(currText);
                            if (date < 0 || date > 31) {
                                dateEditText.setError("Enter proper date");
                                return;
                            }
                            if (currText.length() == 2 || date >= 4) {
                                currText = String.format(Locale.getDefault(), "%02d", date);
                                currText += SEPERATOR;
                            }
                            break;
                        case 1: int month = Integer.parseInt(currText);
                            if (month < 0 || month > 31) {
                                dateEditText.setError("Enter proper month");
                                return;
                            }
                            if (currText.length() == 2 || month >= 2) {
                                currText = String.format(Locale.getDefault(), "%02d", month);
                                currText += SEPERATOR;
                            }
                            break;
                        case 2: int year = Integer.parseInt(currText);
                            if (year < 0 ) {
                                dateEditText.setError("Enter proper year");
                                return;
                            }
                            break;
                    }
                }
                if(previousTxt != null){
                    currText = previousTxt + currText;
                }
                dateEditText.removeTextChangedListener(this);
                dateEditText.setText(currText);
                int textLength = currText.length();
                dateEditText.setSelection(textLength, textLength);
                dateEditText.addTextChangedListener(this);
            }
        });
    }

    private int getOcurrence(String string, char ch) {
        int count = 0;
        int len = string.length();
        for (int i = 0; i < len; i++) {
            if (string.charAt(i) == ch)
                ++count;
        }
        return count;
    }