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Android Studio 4.2 Development Essentials - Kotlin Edition

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

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Product type Paperback
Published in Aug 2021
Publisher Packt
ISBN-13 9781803231549
Length 804 pages
Edition 1st Edition
Languages
Tools
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Author (1):
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Neil Smyth Neil Smyth
Author Profile Icon Neil Smyth
Neil Smyth
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Toc

Table of Contents (94) 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 Introduction to Kotlin 12. Kotlin Data Types,Variables and Nullability 13. Kotlin Operators and Expressions 14. Kotlin Flow Control 15. An Overview of Kotlin Functions and Lambdas 16. The Basics of Object Oriented Programming in Kotlin 17. An Introduction to Kotlin Inheritance and Subclassing 18. An Overview of Android View Binding 19. Understanding Android Application and Activity Lifecycles 20. Handling Android Activity State Changes 21. Android Activity State Changes by Example 22. Saving and Restoring the State of an Android Activity 23. Understanding Android Views, View Groups and Layouts 24. A Guide to the Android Studio Layout Editor Tool 25. A Guide to the Android ConstraintLayout 26. A Guide to Using ConstraintLayout in Android Studio 27. Working with ConstraintLayout Chains and Ratios in Android Studio 28. An Android Studio Layout Editor ConstraintLayout Tutorial 29. Manual XML Layout Design in Android Studio 30. Managing Constraints using Constraint Sets 31. An Android ConstraintSet Tutorial 32. A Guide to using Apply Changes in Android Studio 33. An Overview and Example of Android Event Handling 34. Android Touch and Multi-touch Event Handling 35. Detecting Common Gestures Using the Android Gesture Detector Class 36. Implementing Custom Gesture and Pinch Recognition on Android 37. An Introduction to Android Fragments 38. Using Fragments in Android Studio - An Example 39. Modern Android App Architecture with Jetpack 40. An Android Jetpack ViewModel Tutorial 41. An Android Jetpack LiveData Tutorial 42. An Overview of Android Jetpack Data Binding 43. An Android Jetpack Data Binding Tutorial 44. An Android ViewModel Saved State Tutorial 45. Working with Android Lifecycle-Aware Components 46. An Android Jetpack Lifecycle Awareness Tutorial 47. An Overview of the Navigation Architecture Component 48. An Android Jetpack Navigation Component Tutorial 49. An Introduction to MotionLayout 50. An Android MotionLayout Editor Tutorial 51. A MotionLayout KeyCycle Tutorial 52. Working with the Floating Action Button and Snackbar 53. Creating a Tabbed Interface using the TabLayout Component 54. Working with the RecyclerView and CardView Widgets 55. An Android RecyclerView and CardView Tutorial 56. A Layout Editor Sample Data Tutorial 57. Working with the AppBar and Collapsing Toolbar Layouts 58. An Android Studio Primary/Detail Flow Tutorial 59. An Overview of Android Intents 60. Android Explicit Intents – A Worked Example 61. Android Implicit Intents – A Worked Example 62. Android Broadcast Intents and Broadcast Receivers 63. An Introduction to Kotlin Coroutines 64. An Android Kotlin Coroutines Tutorial 65. An Overview of Android Services 66. Implementing an Android Started Service – A Worked Example 67. Android Local Bound Services – A Worked Example 68. Android Remote Bound Services – A Worked Example 69. An Android Notifications Tutorial 70. An Android Direct Reply Notification Tutorial 71. Foldable Devices and Multi-Window Support 72. An Overview of Android SQLite Databases 73. The Android Room Persistence Library 74. An Android TableLayout and TableRow Tutorial 75. An Android Room Database and Repository Tutorial 76. Accessing Cloud Storage using the Android Storage Access Framework 77. An Android Storage Access Framework Example 78. Video Playback on Android using the VideoView and MediaController Classes 79. Android Picture-in-Picture Mode 80. An Android Picture-in-Picture Tutorial 81. Making Runtime Permission Requests in Android 82. Android Audio Recording and Playback using MediaPlayer and MediaRecorder 83. Printing with the Android Printing Framework 84. An Android HTML and Web Content Printing Example 85. A Guide to Android Custom Document Printing 86. An Introduction to Android App Links 87. An Android Studio App Links Tutorial 88. A Guide to the Android Studio Profiler 89. An Android Biometric Authentication Tutorial 90. Creating, Testing and Uploading an Android App Bundle 91. An Overview of Android Dynamic Feature Modules 92. An Android Studio Dynamic Feature Tutorial 93. An Overview of Gradle in Android Studio Index

64.4 Implementing the SeekBar

The SeekBar controls the number of asynchronous coroutines, ranging from 1 to 2000, that are launched each time the button is clicked. Remaining within the activity_main.xml file, select the SeekBar and use the Attributes tool window to change the max property to 2000. Next, edit the MainActivity.kt file, add a variable in which to store the current slider setting and modify the onCreate() method to add a SeekBar listener:

.

.

import android.widget.SeekBar

.

.

class MainActivity : AppCompatActivity() {

 

    private lateinit var binding: ActivityMainBinding

    private var count: Int = 1

 

    override fun onCreate(savedInstanceState: Bundle?) {

        super.onCreate(savedInstanceState)

        binding = ActivityMainBinding.inflate(layoutInflater)

  &...

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