Unicorns and Mobile Software Design Analytics - Michele Lanza
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Unicorns and Mobile Software Design Analytics Michele Lanza REVEAL | Faculty of Informatics University of Lugano, Switzerland
Absurdistan
Bankistan
R E V E A L
(Mobile) Software Analytics enables
software practitioners to explore and analyze
data to obtain insightful and actionable
information for data-driven tasks around
(mobile) software applications.
Mobile Software Analytics
Huge Marketplace
Huge Marketplace Technologically Interesting
Huge Marketplace
Technologically Interesting
NovelGoal Study Mobile Applications from a Software Design Point of View
ons
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hI Source Code Design & Implementation II Evolution III Use of 3rd Party Libraries
SAMOA Software Analytics for MObile Applications
BACK-END FRONT-END
Source code model extraction SAMOA
SVN
SVN
SVN
SVN
AST generator MSE generator JSON retrieval d3.js
AST parser MSE parser JavaScript/
HTML/CSS
jQuery/PHP
Data acquisition
Java SVN JSON Internet
crawler Files
Metrics extraction
AST-based MSE-based
metrics metricsName Rating Installs Start rev. End rev. LOC
Alogcat 4.6 >100k 2 48 876
Andless 4.2 >100k 2 93 2372
Android VNC 4.3 >1m 2 203 4949
Anstop N/A N/A 2 61 1142
AppSoundmanager 4.5 >50k 1 157 1605
AppsOrganizer 4.6 >1m 3 191 8321
CSIPSimple 4.4 >100k 2 1'415 20777
Diskusage 4.7 >50k 2 69 4749
Mythdroid N/A N/A 76 640 6114
Mythmote 4.6 >10k 2 281 1593
Open GPS Tracker 4.2 >100k 2 1'255 9754
Opensudoku 4.6 >1m 15 415 3813
Replicaisland 4.2 >1m 2 7 14192
Ringdroid 4.6 >10m 2 66 3516
Search Light 4.7 >100k 2 4 272
Share My Position 4.6 >10k 2 76 468
SIPDroid 4 >500k 50 620 14019
Solitaire for Android 4.3 >10m 2 30 3343
Zirco Browser 3.8 >10k 65 457 6429
Zxing 4.3 >50m 569 2'257 3407Delta with largest
Slices represent invocations to snapshot in history
third-party APIs
Number of External Calls
Number of Internal Calls
a
a Call ring colors
Android calls
Java calls
b
Javax calls
Call ring colors
Apache calls
Android
Notcalls
classified calls
Java calls
All other calls
b
Javax calls
Core calls
Apache colors
Activity
Not classified calls
Main Activity
All other calls
Default Main Activity
Service
Phantom element
Core colors
Activity
Main Activity
Default Main Activity
Service
Phantom elementPart I Part II
Snapshot based History based
‣ Dominance of external calls ‣ Core drop
‣ Dominance of internal calls ‣ Delayed use of versioning systems
‣ God-core classes ‣ Flat intervals in history
‣ High core ratio ‣ Gradual increase of core elements
‣ Low core ratio ‣ High correlation between LOC
‣ Multiple main activities and third-party calls
‣ Out-of-sync manifest file
‣ Snap decrease of core elements
‣ Snap increase of core elements
‣ Stepwise growth in history
‣ Stepwise increase of core elements“Findings” ‣ There were no substantial findings ‣ Design principles are essentially absent: Everything is hacked together ‣ Even basic guidelines are being ignored ‣ Code Quality is not a concern ‣ Warning: Our dataset was not small, but by no means large (enough)
Conclusions?
Conclusions
O N
S I
I S E D
M R T
B O
AReflections ‣ Time-to-market is paramount for apps, who cares about the code, as long as it does what it’s supposed to do ‣ Most apps have such a small core domain model that there’s not really much to “design” ‣ The extensive usage of APIs creates some interesting problems, also regarding intellectual property ‣ In a way the dream of component-based software engineering is being realized here, but it’s not a dream, it’s a nightmare
Reflections Too ‣ As long as “apps” run on mobile phones I doubt they will become much more complex: Too many UX concerns ‣ Things might change radically when tablets start departing from phones in terms of apps ‣ Our work is 3 years old ‣ Maybe things changed, but I am not interested ‣ Maybe we looked in the wrong place, at the wrong things
Fin
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