i don't know what i did

common/src/main/java/com/stardust/util/BackPressedHandler.java

@@ -1,6 +1,7 @@
 package com.stardust.util;
 
 import android.app.Activity;
+import android.os.Handler;
 import android.widget.Toast;
 
 
@@ -37,6 +38,10 @@ public interface BackPressedHandler {
             mBackPressedHandlers.add(handler);
         }
 
+        public void registerHandlerAtFront(BackPressedHandler handler) {
+            mBackPressedHandlers.add(0, handler);
+        }
+
         public void unregisterHandler(BackPressedHandler handler) {
             mBackPressedHandlers.remove(handler);
         }