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Hi I am writing an edittext in which I want expiry date of the credit card in MM/YY format. The algorithm I want to implement is as follows: If user enters anything from 2 to 9. I change the text input to 02/ to 09/ If the user enters 1, then I wait for the next digit and check if the int value month if less than 12. Here is my code for this.
@Override
public void afterTextChanged(Editable s) {
String input = s.toString();
if (s.length() == 1) {
int month = Integer.parseInt(input);
if (month > 1) {
mExpiryDate.setText("0" + mExpiryDate.getText().toString() + "/");
mExpiryDate.setSelection(mExpiryDate.getText().toString().length());
mSeperator = true;
}
}
else if (s.length() == 2) {
int month = Integer.parseInt(input);
if (month <= 12) {
mExpiryDate.setText(mExpiryDate.getText().toString() + "/");
mExpiryDate.setSelection(mExpiryDate.getText().toString().length());
mSeperator = true;
}
}
else {
}
}
This works fine until I press a softkey back button. The back slash never goes back. The reason is the second if condition is always met. I am confused about how to solve this. How do I handle the back button inside aftertextchanged? Please help.
464
Expiration dates must be displayed in the format DD-MM-YYYY. If the expiration date is printed in a different format, a sticker with the correct format must be applied, covering the original expiration date.
In short, all financial transaction cards should show the card's expiration date in one of the following two formats: “MM / YY” or “MM-YY” — with the first being the by far most common for credit cards. This represents two digits for the month and two for the year — for example, “02 / 24”.
Expiration dates appear on the front or back of a credit card in a two-digit month/year format. Credit cards expire at the end of the month written on the card. For example, a credit card's expiration date may read as 11/24, which means the card is active through the last day of November 2024.
See my comment above to understand your issue. You might use this to verify the user input with your textwatcher:
SimpleDateFormat formatter =
new SimpleDateFormat("MM/yy", Locale.GERMANY);
Calendar expiryDateDate = Calendar.getInstance();
try {
expiryDateDate.setTime(formatter.parse(mExpiryDate.getText().toString()));
} catch (ParseException e) {
//not valid
}
// expiryDateDate has a valid date from the user
So in complete it would be:
String lastInput ="";
@Override
public void afterTextChanged(Editable s) {
String input = s.toString();
SimpleDateFormat formatter = new SimpleDateFormat("MM/yy", Locale.GERMANY);
Calendar expiryDateDate = Calendar.getInstance();
try {
expiryDateDate.setTime(formatter.parse(input));
} catch (ParseException e) {
if (s.length() == 2 && !lastInput.endsWith("/")) {
int month = Integer.parseInt(input);
if (month <= 12) {
mExpiryDate.setText(mExpiryDate.getText().toString() + "/");
}
}else if (s.length() == 2 && lastInput.endsWith("/")) {
int month = Integer.parseInt(input);
if (month <= 12) {
mExpiryDate.setText(mExpiryDate.getText().toString().subStr(0,1);
}
}
lastInput = mExpiryDate.getText().toString();
//because not valid so code exits here
return;
}
// expiryDateDate has a valid date from the user
// Do something with expiryDateDate here
}
Finally the complete solution:
String input = s.toString();
SimpleDateFormat formatter = new SimpleDateFormat("MM/yy", Locale.GERMANY);
Calendar expiryDateDate = Calendar.getInstance();
try {
expiryDateDate.setTime(formatter.parse(input));
} catch (ParseException e) {
} catch (java.text.ParseException e) {
if (s.length() == 2 && !mLastInput.endsWith("/")) {
int month = Integer.parseInt(input);
if (month <= 12) {
mExpiryDate.setText(mExpiryDate.getText().toString() + "/");
mExpiryDate.setSelection(mExpiryDate.getText().toString().length());
}
}else if (s.length() == 2 && mLastInput.endsWith("/")) {
int month = Integer.parseInt(input);
if (month <= 12) {
mExpiryDate.setText(mExpiryDate.getText().toString().substring(0,1));
mExpiryDate.setSelection(mExpiryDate.getText().toString().length());
} else {
mExpiryDate.setText("");
mExpiryDate.setSelection(mExpiryDate.getText().toString().length());
Toast.makeText(getApplicationContext(), "Enter a valid month", Toast.LENGTH_LONG).show();
}
} else if (s.length() == 1){
int month = Integer.parseInt(input);
if (month > 1) {
mExpiryDate.setText("0" + mExpiryDate.getText().toString() + "/");
mExpiryDate.setSelection(mExpiryDate.getText().toString().length());
}
}
else {
}
mLastInput = mExpiryDate.getText().toString();
return;
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