OnApplicationPause & OnApplicationFocus get delayed

I want to save the current level progress when player exits my game, so I did something like this:

Code (CSharp):

1.  
2.     void OnDisable()
3.     {
4.         Debug.Log("OnDisable");
5.         SaveLevel();
6.     }
7.  
8.     void OnApplicationQuit()
9.     {
10.         Debug.Log("OnApplicationQuit");
11.         SaveLevel();
12.     }
13.  
14.     void OnApplicationFocus(bool focusStatus)
15.     {
16.         Debug.Log("OnApplicationFocus");
17.         SaveLevel();
18.     }
19.  
20.     void OnApplicationPause(bool pauseStatus)
21.     {
22.         Debug.Log("OnApplicationPause");
23.         SaveLevel();
24.     }

However, sometimes when I exit the game none of the functions above gets called, so the app is terminated without saving anything. Is that a bug or I'm missing something? The quick workaround would be to save the game every 30 seconds or so, but I would prefer to do it in a cleaner way.

 

Are you sure the object you've attached this script to exists in the scene when you exit the game ?

 

No, the object is never deleted. I also observed that if the above functions don't fire immediately they are called about 15 seconds after closing the game to background with unity message about forcing the engine to pause.

 

How exactly do you exit application when this function doesn't get called? From unity script or by terminating it while it's in background?

 

I exit by pressing button to show all running apps and then swiping my game (just like a normal user would do). Neither
OnApplicationPause or OnApplicationFocus gets invoked unless I wait about 5 seconds. After that time Unity writes
"Timeout while trying to pause the Unity Engine" to logcat and calls these functions. I tested this using the latest version of unity (5.2). Additionally, I'm using Soomla Store, Admob + Unity ads and CloudOnce plugin.

 

Did anyone get resolution to this issue? We're actually having the same problem (OnApplicationPause, Focus are not called and eventually Unity Timeouts). We're also using Soomla, and Unity 5.2.2.

 

Ah, that's mostly likely it. We target 30fps. Should we submit an additional bug report on this? Also, thanks so much for your timely reply!

 

Hi,

It seems like the "Timeout trying to pause Unity" warning trigger the OnApplicationPause function even if we don't pause anything.

We also have the target fps to 30. It can be related ?

Our game trigger OnApplicationPause randomly and we were asking why.