Android battery performance optimisation

This presentation uncovers what are the main battery drain reasons and how to overcome them. Second part of the presentation gives useful tips and tricks how to develop an app keeping battery performance in mind.
https://youtu.be/ynlQq1hB3Ks

Transcript

1. ANDROID PERFORMANCE TUNING Battery Drain fixed SERGII KOZYREV Android TeamLead 29.06.2017
2. BATTERY
3. Why we hate?
4. What is more important - preserved battery or uploaded cat’s photo?
5. Battery drain options •Screen •Location Scanning •Sensors •Cellular Radio •CPU
6. Where to start?
7. DEMO Battery Historian
8. Screen •WakeLocks •Can’t live without WakeLocks/Sound/Flash •Need bright screen
9. Screen Fixed •Remove WakeLocks (unless it’s payment) •WakeLocks/Sound/Flash – don’t forget to “close the door” and remove •Need bright screen – learn from PlanetaKino
10. Location Scanning •GPS (LocationManager vs LocationServices) •Wi-Fi and BLE (use exponential back off)
11. Location Scanning Fixed •GPS – use GeoFencing (100points, 2 min) •Wi-Fi and BLE – ActivityLifecycleCallbacks as BatterySaver
12. Sensors •Accelerometer (Device, Rate etc.) •Gyro
13. Sensors Fixed •Accelerometer (Device, Rate etc.) •Gyro Significant motion (Sensor.TYPE_SIGNIFICANT_MOTION – one time trigger ) Geofencing
14. Networking
15. Simple but powerful What we usually do for networking?
16. Simple but powerful compile 'com.squareup.retrofit2:retrofit: 2.3.0'
 compile 'com.squareup.okhttp3:okhttp: 3.4.1' Retrofit retrofit = new Retrofit.Builder().client(new OkHttpClient.Builder().build())
 .baseUrl(getString(R.string.base_url))
 .addConverterFactory(GsonConverterFactory.create(new GsonBuilder().setLenient().create()))
 .build()
17. Simple but powerful if (response.isSuccessful() || response.isRedirect()) {
 return response;
 } else {
18. Simple but powerful private boolean isNetworkConnected() {
 ConnectivityManager connectivityManager =
 (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
 NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
 return (networkInfo != null && networkInfo.isConnected());
 } No connection, No request, no radio module power consumption, PROFIT!
19. Doze and AppStandby
20. What we need to know? AppStandby Touches: Application Condition: App in background Sync allowed: once per day Doze Touches: Device Condition: Screen off & unplugged Sync allowed: exponential window Restricted: network, wakelocks, Alarm*, syncadapter, JobScheduler How to fit: FCM or exclusions (settings allowed for IM, Task automation, Peripheral Companion)
21. Reducing Network Battery Drain
22. Analyze and Fix
23. Tag Network Requests if (Build.VERSION.SDK_INT >= 14) {
 try {
 TrafficStats.setThreadStatsTag(USER_INITIATED|APP_INITIATED| SERVER_INITIATED);
 // make network request using HttpClient.execute()
 } finally {
 TrafficStats.clearThreadStatsTag();
 }
 }
24. Use DDMS Bad Good
25. Think and Act! User-initiated traffic App-initiated traffic Server-initiated traffic Pre-fetch Network Data Use batch-requests (multi-payload) Batch and Schedule Requests Push(Gcm/Fcm), not long polling
26. SyncAdapter – hard to implement and configure(account, ContentProvider)
 
 JobScheduler - Minimum API 21
 
 Solution … Firebase JobDispatcher 
 
 DEMO
27. Thank You!