Foreword
Preface
1．Introduction to Android Performance
Performance Matters to Your Users
Ecommerce and Performance
Beyond Ecommerce Sales
Performance Infrastructure Savings
The Ultimate Performance Fail： Outages
Performance as a Rolling Outage
Consumer Reaction to Performance Bugs
Smartphone Battery Life： The Canary in the Coal Mine
Testing Your App for Performance Issues
Synthetic Testing
Real User Monitoring （RUM）
Conclusion
2．Building an Android Device Lab
What Devices Are Your Customers Using？
Device Spec Breakdown Screen
SDK Version
CPU/Memory and Storage
What Networks Are Your Customers Using？
Your Devices Are Not Your Customers' DevicesTesting
Building Your Device Lab
You Want $X，000 for Devices？
So What Devices Should I Pick？
Beyond Phones
Android Open Source Project Devices
Other Options
Additional Considerations
My Device Lab
Conclusion
3．Hardware Performance and Battery Life
Android Hardware Features
Less Is More
What Causes Battery Drain
Android Power Profile
Screen
Radios
CPU
Additional Sensors
Get to Sleep！
Wakelocks and Alarms
Doze Framework
Basic Battery Drain Analysis
App-Specific Battery Drain
Coupling Battery Data with Data Usage
App Standby
Advanced Battery Monitoring
batterystats
Battery Historian
Battery Historian 2．0
JobScheduler
Conclusion
4．Screen and Ul Performance
UI Performance Benchmarks Jank
UI and Rendering Performance Updates in Android Building Views
Hierarchy Viewer
Asset Reduction
Overdrawing the Screen
Testing Overdraw
Overdraw in Hierarchy Viewer
……
5．MemoryPerformance
6．CPU and （PU Performance
7．NetworkPerformance
8．Real User Monitoring
A．OrganizationaI Performance
Index
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