add admin :destroy

app/controllers/admin/activities_controller.rb

@@ -2,7 +2,7 @@ class Admin::ActivitiesController < OrbitMemberController
   layout "member_plugin"
   #include Admin::PersonalActivitiesHelper
 
-  before_action :set_activity, only: [:edit, :update]
+  before_action :set_activity, only: [:edit, :update, :destroy]
   #before_action :set_plugin
 
   #before_action :need_access_right
@@ -41,6 +41,15 @@ class Admin::ActivitiesController < OrbitMemberController
     redirect_to params['referer_url']
   end
 
+  def destroy
+    @activity.destroy
+    respond_to do |format|
+      format.html { redirect_to(admin_activities_url) }
+      format.js
+      format.json { render json: { "success" => true } }
+    end
+  end
+
   private
 
   def set_activity

app/views/admin/activities/destroy.js.erb

@@ -0,0 +1 @@
+$("#<%= dom_id @activity %>").remove();