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Android Programming for Beginners

You're reading from   Android Programming for Beginners Build in-depth, full-featured Android apps starting from zero programming experience

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Product type Paperback
Published in Apr 2021
Publisher Packt
ISBN-13 9781800563438
Length 742 pages
Edition 3rd Edition
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Author (1):
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John Horton John Horton
Author Profile Icon John Horton
John Horton
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Table of Contents (30) Chapters Close

Preface 1. Chapter 1: Beginning Android and Java 2. Chapter 2: First Contact: Java, XML, and the UI Designer FREE CHAPTER 3. Chapter 3: Exploring Android Studio and the Project Structure 4. Chapter 4: Getting Started with Layouts and Material Design 5. Chapter 5: Beautiful Layouts with CardView and ScrollView 6. Chapter 6: The Android Lifecycle 7. Chapter 7: Java Variables, Operators, and Expressions 8. Chapter 8: Java Decisions and Loops 9. Chapter 9: Learning Java Methods 10. Chapter 10: Object-Oriented Programming 11. Chapter 11: More Object-Oriented Programming 12. Chapter 12: The Stack, the Heap, and the Garbage Collector 13. Chapter 13: Anonymous Classes – Bringing Android Widgets to Life 14. Chapter 14: Android Dialog Windows 15. Chapter 15: Arrays, Maps, and Random Numbers 16. Chapter 16: Adapters and Recyclers 17. Chapter 17: Data Persistence and Sharing 18. Chapter 18: Localization 19. Chapter 19: Animations and Interpolations 20. Chapter 20: Drawing Graphics 21. Chapter 21: Threads and Starting the Live Drawing App 22. Chapter 22: Particle Systems and Handling Screen Touches 23. Chapter 23: Supporting Different Versions of Android, Sound Effects, and Spinner Widget 24. Chapter 24: Design Patterns, Multiple Layouts, and Fragments 25. Chapter 25: Building a Simple Image Gallery App 26. Chapter 26: Advanced UI with Navigation Drawer and Fragment 27. Chapter 27: Android Databases 28. Chapter 28: A Quick Chat before You Go 29. Other Books You May Enjoy

The Android Studio Profiler tool

The Android Studio Profiler tool is quite complex and deep. But it is very simple to use it to do some really significant measurements with our app. We can see how much of the device's resources our app is using and therefore attempt to improve the efficiency of our app to make it run more efficiently and use less in the way of resources. By resources, I am talking about CPU and memory usage.

Code optimization is beyond the scope of the book, but a look at how we begin to monitor our app's performance is a good introduction. Select View from the main Android Studio menu and then select Tool Windows | Profiler.

You will see the following window in the lower area of Android Studio:

Figure 22.6 – Android Studio window

To get started using the Profiler tool, run the Live Drawing app. The Profiler tool should begin to display graphs and data as shown in the next figure.

Depending on the configuration of...

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