Braintree/src/main/java/com/braintreepayments/api/BraintreeFragment.java
public <T extends BraintreeListener> void addListener(T listener) {
        if (listener instanceof ConfigurationListener) {
            mConfigurationListener = (ConfigurationListener) listener;
        }

        if (listener instanceof BraintreeCancelListener) {
            mCancelListener = (BraintreeCancelListener) listener;
        }

        if (listener instanceof PaymentMethodNoncesUpdatedListener) {
            mPaymentMethodNoncesUpdatedListener = (PaymentMethodNoncesUpdatedListener) listener;
        }

        if (listener instanceof PaymentMethodNonceCreatedListener) {
            mPaymentMethodNonceCreatedListener = (PaymentMethodNonceCreatedListener) listener;
        }

        if (listener instanceof PaymentMethodNonceDeletedListener) {
            mPaymentMethodNonceDeletedListener = (PaymentMethodNonceDeletedListener) listener;
        }

        if (listener instanceof BraintreePaymentResultListener) {
            mBraintreePaymentResultListener = (BraintreePaymentResultListener) listener;
        }

        if (listener instanceof BraintreeErrorListener) {
            mErrorListener = (BraintreeErrorListener) listener;
        }

        if (listener instanceof UnionPayListener) {
            mUnionPayListener = (UnionPayListener) listener;
        }

        if (listener instanceof AmericanExpressListener) {
            mAmericanExpressListener = (AmericanExpressListener) listener;
        }

        flushCallbacks();
    }
public <T extends BraintreeListener> void addListener(T listener) {
        if (listener instanceof ConfigurationListener) {
            mConfigurationListener = (ConfigurationListener) listener;
        }

        if (listener instanceof BraintreeCancelListener) {
            mCancelListener = (BraintreeCancelListener) listener;
        }

        if (listener instanceof PaymentMethodNoncesUpdatedListener) {
            mPaymentMethodNoncesUpdatedListener = (PaymentMethodNoncesUpdatedListener) listener;
        }

        if (listener instanceof PaymentMethodNonceCreatedListener) {
            mPaymentMethodNonceCreatedListener = (PaymentMethodNonceCreatedListener) listener;
        }

        if (listener instanceof PaymentMethodNonceDeletedListener) {
            mPaymentMethodNonceDeletedListener = (PaymentMethodNonceDeletedListener) listener;
        }

        if (listener instanceof BraintreePaymentResultListener) {
            mBraintreePaymentResultListener = (BraintreePaymentResultListener) listener;
        }

        if (listener instanceof BraintreeErrorListener) {
            mErrorListener = (BraintreeErrorListener) listener;
        }

        if (listener instanceof UnionPayListener) {
            mUnionPayListener = (UnionPayListener) listener;
        }

        if (listener instanceof AmericanExpressListener) {
            mAmericanExpressListener = (AmericanExpressListener) listener;
        }

        flushCallbacks();
    }
public < T extends BraintreeListener > void addListener ( T listener ) { if ( listener instanceof ConfigurationListener ) { mConfigurationListener = ( ConfigurationListener ) listener ; } if ( listener instanceof BraintreeCancelListener ) { mCancelListener = ( BraintreeCancelListener ) listener ; } if ( listener instanceof PaymentMethodNoncesUpdatedListener ) { mPaymentMethodNoncesUpdatedListener = ( PaymentMethodNoncesUpdatedListener ) listener ; } if ( listener instanceof PaymentMethodNonceCreatedListener ) { mPaymentMethodNonceCreatedListener = ( PaymentMethodNonceCreatedListener ) listener ; } if ( listener instanceof PaymentMethodNonceDeletedListener ) { mPaymentMethodNonceDeletedListener = ( PaymentMethodNonceDeletedListener ) listener ; } if ( listener instanceof BraintreePaymentResultListener ) { mBraintreePaymentResultListener = ( BraintreePaymentResultListener ) listener ; } if ( listener instanceof BraintreeErrorListener ) { mErrorListener = ( BraintreeErrorListener ) listener ; } if ( listener instanceof UnionPayListener ) { mUnionPayListener = ( UnionPayListener ) listener ; } if ( listener instanceof AmericanExpressListener ) { mAmericanExpressListener = ( AmericanExpressListener ) listener ; } flushCallbacks ( ) ; }
Adds a listener.

@param listener the listener to add.
Adds a listener .