Android ANR

arcadia

More than errors I have ANR and this is the most frequent:
KeyDispatchingTimeOut

What is? Timeout when launch the game? To much graphics? I load all resources in the main.lua

Today I have received a user message attached to the ANR:
"does not start more :-( sorry but I have to unistall"
I whant his e-mail to say "nooooo please!!"

ar2rsawseen

@arcadia androids default behavior is that if for 5 seconds UI thread is busy when user does any input (touch or key) then ANR occurs.

I my self right now developing a plugin to get images from gallery or camera and use in Gideros, and I'm working on resizing, so on my slow device LG P500, resizing of large image (2000x2000) takes more than 5 seconds, so I'm seeing the ANR dialog quite a lot. But in this dialog there is also an option to wait, I press wait and successfully wait till the image processing is done.

So in reality, it could be that app is actually doing something and you should wait more, but sometimes not.

KeyDispatchingTimeOut basically says that it was key input which detect that UI thread is busy for more than 5 seconds. But that does not mean that something bad happens in your app on Key event. Most probably after seeing black screen and your app loading, user tried to push back, or something like that.

Now to why this happens, is another question.

Firstly did user mention if it started happening after some update, or it was a new user?
Do you know what device did the user have and what resources are available on device (CPU/RAM)?

It might be graphics loading, especially if you are not dividing graphics between screens and simply load everything in the beginning of the app.
It also might be a loop, etc.
It could be some service waiting on the callback

arcadia

mmm
In the Android Activity i also use a thread to display my splash screen to avoid the black screen while gideros load the resources. It's wrong?

ar2rsawseen

no I don't think so, been doing the same.
on which game you have it? let me try it out

arcadia

Save The ark
https://play.google.com/store/apps/details?id=it.arcadiasolutions.savetheark

arcadia

Maybe I could load some resources in the main.lua and some resource the first time i enter in the level scene (if the resource does not exist yet)

ar2rsawseen

Interesting that it actually loaded on my LG P500, took it a while, actually quite a while, but still loaded.

so you load all of your resources in the main file? I would suggest dividing them to the scenes and load only global graphics in main.lua (the ones that are used in many scenes)

arcadia

Ok thx I will do. I could ask you to try again when i will publish The next release?

ar2rsawseen

Sure
And you could also check if those ANRs you have also coming from low end devices, just in case

atilim

Also as a side note, all asset loading and Lua running are done on a different thread. Therefore even if you're loading very big assets or doing a long calculation in Lua, it shouldn't result in ANR.

arcadia

oh...mmm...