jskubick

jskubick

Kotlin and Android Development featuring Jetpack: android:tint vs app:tint (chapter 7, p186)

I found an issue in Chapter 7 regarding android:backgroundTint vs app:backgroundTint.

How to replicate:

  1. load chapter-7 from zipfile into Android Studio

  2. view layout_coin_slot.xml

  3. Notice that Android Studio is complaining about android:tint="@color/coin_slot_color" in the coin slot’s ImageView

Changing it to app:tint="@color/coin_slot_color" fixes it.

The code in the zipfile is consistent with the code in the text… but both are actually wrong (at least, as far as ArcticFox in October 2021 is concerned) and the prefix has to be changed in order to successfully compile.

I think adding the dependency on com.google.android.material on p179 is what caused the use of android:tint to break in chapter 7 (because it worked just fine in chapter 6). I’m not 100% sure, but it looks like Google’s original implementation of the Material library had a bug, and they later decided to fix it in a way that caused any code that used the original syntax (with the ‘android’ prefix) to break.

Due to the namespace change for app:tint, the section about changing the other two Views becomes confusing.

The ImageView needs app:tint="@color/coin_slot_color", but the View needs android:backgroundTint="@color/coin_slot_color", and the TextView needs android:textColor="@color/coin_slot_color"

First Post!

mfazio23

mfazio23

Author of Kotlin and Android Development featuring Jetpack

Hey Jeff,
Which version of the the Material library are you using here?
Also, if the app:tint version also works with older versions, I’ll just update it to use that instead.

Where Next?

Popular Pragmatic Bookshelf topics Top

sdmoralesma
Title: Web Development with Clojure, Third Edition - migrations/create not working: p159 When I execute the command: user=> (create-...
New
jdufour
Hello! On page xix of the preface, it says there is a community forum "… for help if your’re stuck on one of the exercises in this book… ...
New
mikecargal
Title: Hands-on Rust: question about get_component (page 295) (feel free to respond. “You dug you’re own hole… good luck”) I have somet...
New
raul
Page 28: It implements io.ReaderAt on the store type. Sorry if it’s a dumb question but was the io.ReaderAt supposed to be io.ReadAt? ...
New
leba0495
Hello! Thanks for the great book. I was attempting the Trie (chap 17) exercises and for number 4 the solution provided for the autocorre...
New
brian-m-ops
#book-python-testing-with-pytest-second-edition Hi. Thanks for writing the book. I am just learning so this might just of been an issue ...
New
jskubick
I’m under the impression that when the reader gets to page 136 (“View Data with the Database Inspector”), the code SHOULD be able to buil...
New
creminology
Skimming ahead, much of the following is explained in Chapter 3, but new readers (like me!) will hit a roadblock in Chapter 2 with their ...
New
rainforest
Hi, I’ve got a question about the implementation of PubSub when using a Phoenix.Socket.Transport behaviour rather than channels. Before ...
New
jwandekoken
Book: Programming Phoenix LiveView, page 142 (157/378), file lib/pento_web/live/product_live/form_component.ex, in the function below: d...
New

Other popular topics Top

siddhant3030
I’m thinking of buying a monitor that I can rotate to use as a vertical monitor? Also, I want to know if someone is using it for program...
New
New
mafinar
Crystal recently reached version 1. I had been following it for awhile but never got to really learn it. Most languages I picked up out o...
New
New
AstonJ
Was just curious to see if any were around, found this one: I got 51/100: Not sure if it was meant to buy I am sure at times the b...
New
PragmaticBookshelf
Author Spotlight Mike Riley @mriley This month, we turn the spotlight on Mike Riley, author of Portable Python Projects. Mike’s book ...
New
First poster: bot
zig/http.zig at 7cf2cbb33ef34c1d211135f56d30fe23b6cacd42 · ziglang/zig. General-purpose programming language and toolchain for maintaini...
New
New
PragmaticBookshelf
Develop, deploy, and debug BEAM applications using BEAMOps: a new paradigm that focuses on scalability, fault tolerance, and owning each ...
New
AstonJ
If you’re getting errors like this: psql: error: connection to server on socket “/tmp/.s.PGSQL.5432” failed: No such file or directory ...
New

Sub Categories: