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Android Studio 4.2 Development Essentials - Java Edition

You're reading from   Android Studio 4.2 Development Essentials - Java Edition Developing Android applications using Android Studio 4.2, Java, and Android Jetpack

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Product type Paperback
Published in Aug 2021
Publisher Packt
ISBN-13 9781803238814
Length 782 pages
Edition 1st Edition
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Author (1):
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Neil Smyth Neil Smyth
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Neil Smyth
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Table of Contents (87) Chapters Close

1. Introduction 2. Setting up an Android Studio Development Environment FREE CHAPTER 3. Creating an Example Android App in Android Studio 4. Creating an Android Virtual Device (AVD) in Android Studio 5. Using and Configuring the Android Studio AVD Emulator 6. A Tour of the Android Studio User Interface 7. Testing Android Studio Apps on a Physical Android Device 8. The Basics of the Android Studio Code Editor 9. An Overview of the Android Architecture 10. The Anatomy of an Android Application 11. An Overview of Android View Binding 12. Understanding Android Application and Activity Lifecycles 13. Handling Android Activity State Changes 14. Android Activity State Changes by Example 15. Saving and Restoring the State of an Android Activity 16. Understanding Android Views, View Groups and Layouts 17. A Guide to the Android Studio Layout Editor Tool 18. A Guide to the Android ConstraintLayout 19. A Guide to Using ConstraintLayout in Android Studio 20. Working with ConstraintLayout Chains and Ratios in Android Studio 21. An Android Studio Layout Editor ConstraintLayout Tutorial 22. Manual XML Layout Design in Android Studio 23. Managing Constraints using Constraint Sets 24. An Android ConstraintSet Tutorial 25. A Guide to using Apply Changes in Android Studio 26. An Overview and Example of Android Event Handling 27. Android Touch and Multi-touch Event Handling 28. Detecting Common Gestures Using the Android Gesture Detector Class 29. Implementing Custom Gesture and Pinch Recognition on Android 30. An Introduction to Android Fragments 31. Using Fragments in Android Studio - An Example 32. Modern Android App Architecture with Jetpack 33. An Android Jetpack ViewModel Tutorial 34. An Android Jetpack LiveData Tutorial 35. An Overview of Android Jetpack Data Binding 36. An Android Jetpack Data Binding Tutorial 37. An Android ViewModel Saved State Tutorial 38. Working with Android Lifecycle-Aware Components 39. An Android Jetpack Lifecycle Awareness Tutorial 40. An Overview of the Navigation Architecture Component 41. An Android Jetpack Navigation Component Tutorial 42. An Introduction to MotionLayout 43. An Android MotionLayout Editor Tutorial 44. A MotionLayout KeyCycle Tutorial 45. Working with the Floating Action Button and Snackbar 46. Creating a Tabbed Interface using the TabLayout Component 47. Working with the RecyclerView and CardView Widgets 48. An Android RecyclerView and CardView Tutorial 49. A Layout Editor Sample Data Tutorial 50. Working with the AppBar and Collapsing Toolbar Layouts 51. An Android Studio Primary/Detail Flow Tutorial 52. An Overview of Android Intents 53. Android Explicit Intents – A Worked Example 54. Android Implicit Intents – A Worked Example 55. Android Broadcast Intents and Broadcast Receivers 56. A Basic Overview of Java Threads, Handlers and Executors 57. An Overview of Android Services 58. Implementing an Android Started Service – A Worked Example 59. Android Local Bound Services – A Worked Example 60. Android Remote Bound Services – A Worked Example 61. An Android Notifications Tutorial 62. An Android Direct Reply Notification Tutorial 63. Foldable Devices and Multi-Window Support 64. An Overview of Android SQLite Databases 65. The Android Room Persistence Library 66. An Android TableLayout and TableRow Tutorial 67. An Android Room Database and Repository Tutorial 68. Accessing Cloud Storage using the Android Storage Access Framework 69. An Android Storage Access Framework Example 70. Video Playback on Android using the VideoView and MediaController Classes 71. Android Picture-in-Picture Mode 72. An Android Picture-in-Picture Tutorial 73. Making Runtime Permission Requests in Android 74. Android Audio Recording and Playback using MediaPlayer and MediaRecorder 75. Working with the Google Maps Android API in Android Studio 76. Printing with the Android Printing Framework 77. An Android HTML and Web Content Printing Example 78. A Guide to Android Custom Document Printing 79. An Introduction to Android App Links 80. An Android Studio App Links Tutorial 81. A Guide to the Android Studio Profiler 82. An Android Biometric Authentication Tutorial 83. Creating, Testing and Uploading an Android App Bundle 84. An Overview of Android Dynamic Feature Modules 85. An Android Studio Dynamic Feature Tutorial 86. An Overview of Gradle in Android Studio Index

81.6 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 81-14:

Figure 81-14

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 81-15) lists all of the objects within the app that were using memory at the time the dump was...

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