Conventions used

There are a number of text conventions used throughout this book.

Code in text: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: “We created a class named PetsRepositoryImpl that implements the PetsRepository interface.”

A block of code is set as follows:

class PetsViewModel: ViewModel() {
    private val petsRepository: PetsRepository = PetsRepositoryImpl()
    fun getPets() = petsRepository.getPets()
}

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

[default]
exten => s,1,Dial(Zap/1|30)
exten => s,2,Voicemail(u100)
exten => s,102,Voicemail(b100)
exten => i,1,Voicemail(s0)

Any command-line input or output is written as follows:

FATAL EXCEPTION: main
Process: com.packt.chapterten, PID: 7168
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.packt.chapterten/com.packt.chapterten.MainActivity}: java.lang.RuntimeException: This is a crash
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3645)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3782)

Bold: Indicates a new term, an important word, or words that you see on screen. For instance, words in menus or dialog boxes appear in bold. Here is an example: “Tap on the New Project button, which will take us to the Templates screen.”

Tips or important notes

Appear like this.