Book Image

Android Programming for Beginners - Third Edition

By : John Horton
Book Image

Android Programming for Beginners - Third Edition

By: John Horton

Overview of this book

Do you want to make a career in programming but don’t know where to start? Do you have a great idea for an app but don't know how to make it a reality? Or are you worried that you’ll have to learn Java programming to become an Android developer? Look no further! This new and expanded third edition of Android Programming for Beginners will be your guide to creating Android applications from scratch. The book starts by introducing you to all the fundamental concepts of programming in an Android context, from the basics of Java to working with the Android API. You’ll learn with the help of examples that use up-to-date API classes and are created within Android Studio, the official Android development environment that helps supercharge your mobile application development process. After a crash course on the key programming concepts, you’ll explore Android programming and get to grips with creating applications with a professional-standard UI using fragments and storing user data with SQLite. This Android Java book also shows you how you can make your apps multilingual, draw on the screen with a finger, and work with graphics, sound, and animations. By the end of this Android programming book, you'll be ready to start building your own custom applications in Android and Java.
Table of Contents (30 chapters)

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...