diff --git a/src/happyx_native/abstract/saving.nim b/src/happyx_native/abstract/saving.nim
index 89bc93d..82d057f 100644
--- a/src/happyx_native/abstract/saving.nim
+++ b/src/happyx_native/abstract/saving.nim
@@ -75,6 +75,8 @@ template loadImpl[T](filename: string, parseFunc: untyped): untyped =
     when T is string:
       return $sharedPreferences.getString(filename, "")
     else:
+      if ($sharedPreferences.getString(filename, "")).len == 0:
+        return T.default
       return `parseFunc`($sharedPreferences.getString(filename, ""))
   else:
     if not dirExists(getHomeDir() / "hpxnative"):
@@ -89,6 +91,8 @@ template loadImpl[T](filename: string, parseFunc: untyped): untyped =
     when T is string:
       return data
     else:
+      if $data.len == 0:
+        return T.default
       return `parseFunc`($data)
 
 
diff --git a/src/happyx_native/android/autils.nim b/src/happyx_native/android/autils.nim
index 8f670a0..5c287a6 100644
--- a/src/happyx_native/android/autils.nim
+++ b/src/happyx_native/android/autils.nim
@@ -146,7 +146,7 @@ jClass android.content.SharedPreferences$Editor as SharedPreferencesEditor* of O
   proc putInt*(key: string, value: jint): SharedPreferencesEditor
   proc putLong*(key: string, value: jlong): SharedPreferencesEditor
   proc putString*(key: string, value: string): SharedPreferencesEditor
-  proc putStringSet*(key: string, value: Set[string]): SharedPreferencesEditor
+  # proc putStringSet*(key: string, value: Set[string]): SharedPreferencesEditor
   proc remove*(key: string): SharedPreferencesEditor
 
 
@@ -159,7 +159,7 @@ jClass android.content.SharedPreferences of Object:
   proc getInt*(key: string, defValue: jint): jint
   proc getLong*(key: string, defValue: jlong): jlong
   proc getString*(key: string, defValue: string): string
-  proc getStringSet*(key: string, defValue: Set[string]): Set[string]
+  # proc getStringSet*(key: string, defValue: Set[string]): Set[string]
 
 
 jClass android.graphics.Rect* of Object:
diff --git a/src/happyx_native/app/app.nim b/src/happyx_native/app/app.nim
index 972ed4b..b9e4702 100644
--- a/src/happyx_native/app/app.nim
+++ b/src/happyx_native/app/app.nim
@@ -360,6 +360,7 @@ template nativeAppImpl*(appDirectory: string = "/assets", port: int = 5123,
           );
           hpxNative.callJs(v[0], v[1]);
         }
+        ws.onopen = () => {connected = true};
         var hpxNative = {
           callJs: function (func, arr) {
             window[func].apply(null, arr);