refactor changes

Author: simarsingh24

android/app/src/main/java/org/fossasia/openevent/core/discount/DiscountViewHolder.java

@@ -57,25 +57,24 @@ public void bindDiscountCode(DiscountCode discountCode) {
         int maxQuantity = discountCode.getMax_quantity();
         float value = discountCode.getValue();
 
-        setStringField(discountCodeTextView, code, "");
-        setStringField(discountCodeValue, "Value : "+value, "");
-        setStringField(discountMinQuantity, "Minimum Quantity : "+minQuantity, "");
-        setStringField(discountMaxQuantity, "Maximum Quantity :"+maxQuantity, "");
-        setStringField(discountTicket, tickets, "Tickets : ");
-        setStringField(discountUsedFor, usedFor, "Used For : ");
-        setStringField(this.discountUrl, discountUrl, "Discount URL : ");
+        setStringFieldWithPrefix(discountCodeTextView, code, "");
+        setStringFieldWithPrefix(discountCodeValue, "Value : "+value, "");
+        setStringFieldWithPrefix(discountMinQuantity, "Minimum Quantity : "+minQuantity, "");
+        setStringFieldWithPrefix(discountMaxQuantity, "Maximum Quantity :"+maxQuantity, "");
+        setStringFieldWithPrefix(discountTicket, tickets, "Tickets : ");
+        setStringFieldWithPrefix(discountUsedFor, usedFor, "Used For : ");
+        setStringFieldWithPrefix(this.discountUrl, discountUrl, "Discount URL : ");
 
     }
 
 
-    private void setStringField(TextView textView, String field, String prefix) {
+    private void setStringFieldWithPrefix(TextView textView, String field, String prefix) {
         if (textView == null)
             return;
 
         if (!TextUtils.isEmpty(field.trim())) {
             textView.setVisibility(View.VISIBLE);
-            field = prefix + field;
-            textView.setText(field);
+            textView.setText(prefix + field);
         } else {
             textView.setVisibility(View.GONE);
         }