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1.4 BILLION Android users in the world How do we get to the next billion? YATIN TALUJA ANDROID DEVELOPER, SOCIALCOPS www.socialcops.com
OUR AVERAGE USER PROMILA • 7th Class Pass • Can speak, read & write only in Marathi • Lives In Raigadh in Rural Maharashtra • Average user of our Android App Collect • This is her first interaction with a smartphone
OUR DAILY CHALLENGES UI/UX for the next billion Low End Devices Poor Infrastructure
46k 30mn Lines of Code written Data points Collected 50+ 7+ Field Visits & Trainings Developing countries Here’s what we’ve learnt about building for the next billion
USE COLOURS WELL
LOVE ICONS? RETHINK IT.
KEEP INTERACTIONS MINIMAL
INCLUDE LOCAL LANGUAGE CAPABILITY • Android officially supports 47 languages and as input using keyboard it supports 86 languages and 52 languages via handwriting. • Save translations of words into the app for different languages. • Allow user to download different languages for inputing text using phone settings. • Handwriting is another new feature where you can just write in the way you write on paper and it will automatically convert that to digital text.
DON’T MAKE USERS WAIT • Prefetch Data • Run Background Threads for complex operations
OPTIMIZE FOR LOW MEMORY Use allocation tracker for keeping track for memory taken by each object • This library by Square which will give you information about memory leak (https://github.com/square/ leakcanary) •
OPTIMIZE FOR SCREEN SIZE dp(Density independent Pixels) → 1 dp = 1 physical px for 160 dpi, and for 240 dpi 1 dp = 1.5 physical px. → px = dp * (dpi/160) /// dp table
REDUCE BATTERY CONSUMPTION • Battery consumption is directly proportional to network calls, thus choose between network calls wisely • Observe and Optimize (Use tools like Battery Historian)
CHOOSING BETWEEN NETWORK CALLS • Edge takes long time to perform network operation, but takes less battery • Wifi takes less time to perform network operation, but take more battery than edge • 3g will take more time to perform network operation than Wifi, and also consumes more battery than Wifi. • 4g will take less time to perform network operation than Wifi, and also consumes less power than 3g.
PATIENCE IS A VIRTUE. • Persist. • Be patient. • Be determined. Good Code will fix all problems ;)
#Android4India @Social_Cops Fb.com/SocialCops www.socialcops.com