add proguard

foudations/httpdns-base/src/main/java/com/mogo/httpdns/IMogoHttpDns.java

@@ -42,6 +42,7 @@ interface IMogoHttpDns extends IProvider {
      * @param type 类型
      * @return
      */
+    @Keep
     String getCachedHttpDnsIps(String host, int type);
 //
 //    /**
@@ -60,6 +61,7 @@ interface IMogoHttpDns extends IProvider {
      * @param useCache
      * @param callback
      */
+    @Keep
     void getHttpDnsIp(String host, int type, boolean useCache, IHttpDnsCallback callback);
 
 //    /**
@@ -76,6 +78,7 @@ interface IMogoHttpDns extends IProvider {
      * @param type
      * @param callback
      */
+    @Keep
     void addHttpDnsTtlCallback(String host, int type, IHttpDnsTtlCallback callback);
 
 //    /**
@@ -90,5 +93,6 @@ interface IMogoHttpDns extends IProvider {
      * @param host
      * @param type
      */
+    @Keep
     void removeHttpDnsTtlCallback(String host,int type);
 }

foudations/httpdns-base/src/main/java/com/mogo/httpdns/MogoHttpDnsHandler.java

@@ -14,6 +14,10 @@ public
 @Keep
 class MogoHttpDnsHandler {
 
+    private MogoHttpDnsHandler(){
+
+    }
+
     private static IMogoHttpDns sHttpDns;
 
     public static IMogoHttpDns getHttpDnsApi() {