NXT-Spy – Finally found a way to kill the android app completely!

A very annoying problem since I am working with the net2 package of JCSP on the Android phone was to stop the app completely; in fact, when I stopped the experiment by just closing the app it was not closing its process, so every values and processes accessed in a static way were kept in memory.

This very strange behaviour implemented by Android had for effect to make the application crash every two runs because when net2.Node tried to instantiate itself, it discovered that it was already instantiated and that the Wi-Fi sockets it was about to create already existed too!

So today, I decided that this recalcitrant piece of code could not continue to humiliate me like that, so I created a very simple Android application that is just be creating a JCSP.net2 server connection. I ran this application two times and as predicted, it crashed at the second run. I had my test case and won’t stop working on it until I find a solution or die of insomnia.

And after a couple of hours trying to modify net2’s source code, investigating on internet and reading the bug logs of the phone, EUREKA! The solution to this problem was found [here]. It is probably the problem on which I spent most time on during this project (I think I tried to find a solution to this problem more than 10 times) and it was solved in only one line to call when the program closes (by overriding the finalize method) which is:


Supervisor’s comment:

The wording of the blog made me laugh out loud; thank you!!
It is sickening to discover that one line of code is all that is required!!

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