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

86.7 Drawing the Content on the Page Canvas

We have now reached the point where some code needs to be written to draw the content on the pages so that they are ready for printing. The content that gets drawn is completely application specific and limited only by what can be achieved using the Android Canvas class. For the purposes of this example, however, some simple text and graphics will be drawn on the canvas.

The onWrite() method has been designed to call a method named drawPage() which takes as arguments the PdfDocument.Page object representing the current page and an integer representing the page number. Within the MainActivity.kt file this method should now be implemented as follows:

package com.ebookfrenzy.customprint

.

.

import android.graphics.Color

import android.graphics.Paint

 

class MainActivity : AppCompatActivity() {

.

.

   inner class MyPrintDocumentAdapter(private var context: Context) :

   ...