I want to have a listener when a message is opened from the application messages folder. For this I make use of ApplicationMenuItem, but after registering it, the message could
As I understand you don't see system "Message preview" screen any more. I have same problem. Seems when you register menu item it completely overrides open action. I checked Message List Demo and found that they open custom preview message screen inside ApplicationMenuItem's run() method. As I didn't found any way to open system "Message preview" screen with my message I'm going to implement custom screen also.