Create final Calendar instance only when creating ExpiryWatcher instance

Author: emmanuelkehinde

raveandroid/src/main/java/com/flutterwave/raveandroid/card/CardFragment.java

@@ -834,8 +834,13 @@ public void onPageFinished(WebView view, String url) {
 
     private class ExpiryWatcher implements TextWatcher {
 
+        private final Calendar calendar;
         private String lastInput = "";
 
+        public ExpiryWatcher() {
+            calendar = Calendar.getInstance();
+        }
+
         @Override
         public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
 
@@ -850,7 +855,6 @@ public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
         public void afterTextChanged(Editable editable) {
             String input = editable.toString();
             SimpleDateFormat simpleDateFormat = new SimpleDateFormat("MM/yy");
-            Calendar calendar = Calendar.getInstance();
 
             try {
                 calendar.setTime(simpleDateFormat.parse(input));