fix

src/main/java/au/com/royalpay/payment/manage/appclient/core/impls/RetailAppServiceImp.java

@@ -1175,8 +1175,12 @@ public class RetailAppServiceImp implements RetailAppService {
         deviceSupport.findRegister(clientType);
         JSONObject res = royalPayCMSSupport.listArticles("app_ad", false, true, 1, 10);
         JSONArray acts = res.getJSONArray("data");
-        int selectNo = RandomUtils.nextInt(0,acts.size());
+        if (acts.size()>0){
-        return acts.getJSONObject(selectNo);
+            int selectNo = RandomUtils.nextInt(0,acts.size());
+            return acts.getJSONObject(selectNo);
+        }
+        return null;
+
     }
 
     private static boolean mathchLetterorNum(String str) {