creditcard-input-helper

Simple helper library to input credit card number, expiry month/year and security code on Android.

Download

Project build.gradle

allprojects {
    repositories {
        ...
        maven { url "https://jitpack.io" }
    }
}

App build.gradle

dependencies {
    ...
    implementation 'com.github.konifar:creditcard-input-helper:LATEST_VERSION'
}

LATEST_VERSION is .

Features

1. CardNumberTextWatcher
2. CardMonthYearTextWatcher
3. NoCopyAndCutSelectionActionModeCallback

1. CardNumberTextWatcher

Simple TextWatcher class to format and validate card number according to the card brand.

editText.addTextChangedListener(object : CardNumberTextWatcher(
    separatorType = CardNumberSeparatorType.SPACE, // SPACE or HYPHEN
    supportedCardBrand = arrayOf(
        Visa(), Amex(), Mastercard()
    ) // Set supported card brand in your app (default: all)
) {
    override fun onCardBrandChanged(cardBrand: CardBrand) {
        // Card brand is detected or changed
    }

    override fun onCardNumberErrorChanged(error: CardNumberError) {
        // Error occurs (If no error, CardNumberError.None)
    }

    override fun onCardNumberCompleted(cardBrand: CardBrand) {
        // Completed to input card number without any errors
    }
})

The supported brands are following.

Card Brand	Example number
American Express	3782 822463 10005
Diners Club	3622 7206 2716 67
Discover	6011 1111 1111 1117
JCB	3566 0020 2036 0505
Mastercard	5555 5555 5555 4444
Visa	4242 4242 4242 4242

The error types are following.

Error type	Description
Empty	Number is empty
Not enough length	Number is less than format length (ex: less than 16 for Visa)
Unsupported brand	Number matches brand but it's not supported for the app
Invalid brand format	Number doesn't match brand prefix
Invalid card number	Number is invalid as Luhn algorithm

2. CardMonthYearTextWatcher

Simple TextWatcher class to format and validate month/year.

editText.addTextChangedListener(object : CardMonthYearTextWatcher() {
    override fun onCardMonthYearErrorChanged(error: CardMonthYearError) {
        // Error occurs (If no error, CardMonthYearError.None)
    }

    override fun onCardMonthYearCompleted() {
        // Completed to input card month/year without any errors
    }
})

The error types are following.

Error type	Description
Empty	Text is empty
Month required	Month is empty
Month invalid	Month is invalid like 13, 00
Year required	Year is empty
Year invalid	Year is invalid like 00, 99 (more than 20 years later)
Expired	Month/Year is expired

3. NoCopyAndCutSelectionActionModeCallback

Simple ActionModeCallback class to remove copy and cut option menu.

Before	After

editText.customSelectionActionModeCallback = NoCopyAndCutSelectionActionModeCallback()

Contributing

We are always welcome your contribution! If you find a bug or want to add new feature, please raise issue.