Challenges and Enhancements in modern Android applications

This deck describes the commin problems face by Android Developers and what enhancements can be done to solve them. It also recommends best practices like Background jobs, Battery Optimization, Offline first, Code Obfuscation, APK Size Reduction, etc

Transcript

1. Challenges and Enhancements in modern Android Apps Mayuri Khinvasara Lead Android Consultant @mayuri_k
2. The rise and rise of Android Apps
3. Phones have become smarter. Have we as developers, as well ?
4. Common Challenges • Network • Background Jobs • Storage • Battery Optimizations • System Restrictions
5. APK Size
6. Strategies • Understand the APK structure (assets, res, libs, dex files , etc) • Remove unused resources • Removed localized resources (typically languages used from other 3rd party libs) • Support specific densities only • Reduce resource count and size
7. APK Analyzer
8. Analyze dependencies
9. Reduce Resources Typically in a large size APK, Splash Screen image
10. Limited Network Connectivity • India before and After Jio • Post Jio (4G)
11. Manage Network Usage • Listen to network states (Pause when required) • Defer Sync/ Upload jobs to WIFI network • Use modern day Background jobs.
12. Network less notifications • Cache Data • Receive Notifications clicks and dismiss events • Use them intelligently to know your user • Improve your click ratio and maximize user engagement
13. Battery Optimisation Techniques • Lazy First Approach • a. Reduce ( Can data be cached instead ? ) b. Defer (Can it wait until device is charging ? ) c. Coalesce (Batched Requests ?)
14. Doze Mode
15. Doze Mode Restrictions • Network access is suspended. • wake locks Ignored • Standard AlarmManager alarms (including setExact() and setWindow()) are deferred to the next maintenance window. ◦ If you need to set alarms that fire while in Doze, use setAndAllowWhileIdle() or setExactAndAllowWhileIdle(). • No Wi-Fi scans. • Doesn’t allow sync adapters to run. • Doesn’t allow JobScheduler to run.
16. Observe how your app responds • Force device into idle mode $ adb shell dumpsys deviceidle force-idle • Remove idle mode $ adb shell dumpsys deviceidle unforce Reactivate the device by performing the following command: $ adb shell dumpsys battery reset
17. Notifications Grouping
18. Notification Badges/Dots
19. Notification Counts (setNumber) val notificationID = 2 val messageCount = 8 val notification = Notification.Builder(this, id) .setContentTitle(getString(R.string.title_discounts)) .setContentText(getString(R.string.description_discounts)) .setSmallIcon(R.drawable.ic_airplanemode_active_grey_2 4dp) .setBadgeIconType(BADGE_ICON_SMALL) .setNumber(messageCount) .build() notificationManager.notify(notificationID, notification)
20. Android studio tools
21. Measure app performance • Memory Profiling • CPU Profiling • Network profiling • Energy profiling • Battery Historian
22. Memory Intensive applications public void doSomethingMemoryIntensive() { ActivityManager.MemoryInfo memoryInfo = getAvailableMemory(); if (!memoryInfo.lowMemory) { // Do memory intensive work ... } } // Get a MemoryInfo object for the device's current memory status. private ActivityManager.MemoryInfo getAvailableMemory() { ActivityManager activityManager = (ActivityManager) this.getSystemService(ACTIVITY_SERVICE); ActivityManager.MemoryInfo memoryInfo = new ActivityManager.MemoryInfo(); activityManager.getMemoryInfo(memoryInfo); return memoryInfo; }
23. Making mobile apps smarter with geofence technology
24. GeoFence -Define Zone Radius and Receive events like -Enter -Dwell -Exit
25. Use Cases 1. Retail Shops 2. Hotels 3. Cafes 4. Airline Apps 5. Payment Apps
26. Android app Learnings A case study -Target audience -Usage(daily/weekly/monthly) -Minimum Feature Set -Fluid UI -Well thought marketing -Feedback And improvements
27. Case Study
28. Simple app with 7000+ downloads -Made in one week -Rating 4.7 - APK Size 1.5 MB -Clean UI- -Fluid Design -Image pinch and zoom -Go To Page feature -Share with friends -Contact Us
29. What next for Android ? Next 10 years for Android: - more AI - more form factors and device types - focus on safety and well-being
30. Thank You ! Reach out. Mayuri Khinvasara Lead Android Developer mayuri_k