Book Image

Android Studio 4.1 Development Essentials – Kotlin Edition

By : Neil Smyth
Book Image

Android Studio 4.1 Development Essentials – Kotlin Edition

By: Neil Smyth

Overview of this book

Android 11 has a ton of new capabilities. It comes up with three foci: a people-centric approach to communication, controls to let users quickly access and manage all of their smart devices, and privacy to give users more ways to control how data on devices is shared. This book starts off with the steps necessary to set up an Android development and testing environment, followed by an introduction to programming in Kotlin. An overview of Android Studio and its architecture is provided, followed by an in-depth look at the design of Android applications and user interfaces using the Android Studio environment. You will also learn about the Android architecture components along with some advanced topics such as touch screen handling, gesture recognition, the recording and playback of audio, app links, dynamic delivery, the AndroidStudio profiler, Gradle build configuration, and submitting apps to the Google Play Developer Console. The concepts of material design are also covered in detail. This edition of the book also covers printing, transitions, and cloud-based file storage; foldable device support is the cherry on the cake. By the end of this course, you will be able to develop Android 11 Apps using Android Studio 4.1, Kotlin, and Android Jetpack. The code files for the book can be found here: https://www.ebookfrenzy.com/retail/as41kotlin/index.php
Table of Contents (95 chapters)
95
Index

89.6 Memory Profiler

The memory profiler is displayed when the memory time-line is clicked within the main Android Profiler Tool window and appears as shown in Figure 89-14:

Figure 89-14

The memory time-line shows memory allocations relative to the scale on the right-hand side of the time-line for a range of different categories as indicated by the color key. The dashed line (A) represents the number of objects allocated for the app relative to the scale on the left-hand side of the time-line graph.

The trash can icons (B) indicate garbage collection events. A garbage collection event occurs when the Android runtime decides that an object residing in memory is no longer needed and automatically removes it to free memory.

In addition to the usual timelines, the window includes buttons (C) to force garbage collection events and to capture a heap dump.

A heap dump (Figure 89-15) lists all of the objects within the app that were using memory at the time the dump was...