Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
DevFest Uyo—Jetpack compose: Game changer for b...
Search
Love
November 13, 2021
Programming
0
130
DevFest Uyo—Jetpack compose: Game changer for building Modern Android UI
Love
November 13, 2021
Tweet
Share
More Decks by Love
See All by Love
Introduction to Kotlin Multiplatform: Write Once, Run Everywhere
lamouresparus
0
91
Override Kotlin Property Getters and Setters
lamouresparus
0
31
Get started with the Gemini API in Android apps (client SDK)
lamouresparus
1
150
Code Surgery: Refactoring for a Healthy App
lamouresparus
0
11
Information gathering
lamouresparus
0
24
Code Surgery: Refactoring for a Healthy App
lamouresparus
0
41
Managing Technical Writing Projects
lamouresparus
0
61
DEVFEST BANJUL 2023: "Relay: The Future of Design to Code Workflows"
lamouresparus
0
94
WTM Aba Breakfast: Tech Career: Reaching Goals and Gaining Experiences
lamouresparus
0
44
Other Decks in Programming
See All in Programming
3 Effective Rules for Using Signals in Angular
manfredsteyer
PRO
0
110
ふかぼれ!CSSセレクターモジュール / Fukabore! CSS Selectors Module
petamoriken
0
150
as(型アサーション)を書く前にできること
marokanatani
10
2.7k
Quine, Polyglot, 良いコード
qnighy
4
640
Why Jakarta EE Matters to Spring - and Vice Versa
ivargrimstad
0
1.1k
Remix on Hono on Cloudflare Workers
yusukebe
1
290
レガシーシステムにどう立ち向かうか 複雑さと理想と現実/vs-legacy
suzukihoge
14
2.2k
3rd party scriptでもReactを使いたい! Preact + Reactのハイブリッド開発
righttouch
PRO
1
600
Jakarta EE meets AI
ivargrimstad
0
560
役立つログに取り組もう
irof
28
9.6k
A Journey of Contribution and Collaboration in Open Source
ivargrimstad
0
930
AI時代におけるSRE、 あるいはエンジニアの生存戦略
pyama86
6
1.1k
Featured
See All Featured
The MySQL Ecosystem @ GitHub 2015
samlambert
250
12k
JavaScript: Past, Present, and Future - NDC Porto 2020
reverentgeek
47
5k
ReactJS: Keep Simple. Everything can be a component!
pedronauck
665
120k
The Illustrated Children's Guide to Kubernetes
chrisshort
48
48k
Gamification - CAS2011
davidbonilla
80
5k
Speed Design
sergeychernyshev
25
620
A Philosophy of Restraint
colly
203
16k
Designing the Hi-DPI Web
ddemaree
280
34k
Docker and Python
trallard
40
3.1k
実際に使うSQLの書き方 徹底解説 / pgcon21j-tutorial
soudai
169
50k
Designing Experiences People Love
moore
138
23k
Agile that works and the tools we love
rasmusluckow
327
21k
Transcript
Jetpack Compose: Game changer for building Modern Android UI Love
Sparus O’tudor Android Engineer, FrontendLabs Uyo
What is Jetpack Compose? Holla Jetty Packy😊
Jetpack Compose is a modern declarative UI Toolkit to simplify
and accelerate native Android UI development.
What ever happened to our famous XML?🤔
Different Languages 30+ thousands lines of code Cognitive Overhead Multiple
Files Deprecated Code Boilerplate Codes Multiple layers of inheritance Problems with the Traditional View System
UI logic and definition are completely Separate Uses XML Satic
Layout Definition Kotlin/Java Dynamic Logic & Behaviour Completely Separate Generates a lot of boilerplate codes
A Quick Look at Jetpack Compose
Jetpack Compose favours Composition over Inheritance is a Human has
a Composition Inheritance
Declarative UI Focus on the “WHAT” and not the “HOW”
Jetpack Compose is a function of State Anytime the “state“
changes the “compose UI” changes also.
@Preview @Composable setContent{} Compose Preview Material Theme
Composable Functions • Annotated with @Composable • @Composable informs the
compiler that the function is intended to convert data into UI. • Can accept parameters • Returns nothing
Composable Functions
“Composable functions can only be called in the context of
another compose function...”
setContent{} • The setContent block defines the activity's layout where
we call composable functions. • The content becomes the root view of the activity. • More like setContentView() in XML.
setContent{}
Material Theme • An implementation of Material Design. • Define
the applications theme with its respective colors, shapes, font, etc. • Can be customized. • Mostly the root element of the screen.
Material Theme
Modifier • An ordered, immutable collection of modifier elements that
decorate or add behavior to Compose UI elements. • Modifiers can be chained. • Their chaining order is important.
Modifier
Layouts Column Row Box Constraint Layout
Column
Row
Box
Say Goodbye to RecyclerView Welcome LazyRow and LazyColumn 🤩
Managing Lists In Compose • Compose makes it easy to
create lists. • These composables render only the elements that are visible on screen.
LazyRow A LazyRow is a horizontally scrolling list that only
composes and lays out the currently visible items.
LazyColumn A LazyColumn is a vertically scrolling list.
LazyVerticalGrid • A LazyColumn is a vertically scrolling grid. •
It accepts the number of grid items in one row or the minimum width of one item. • Unstable API.
LazyVerticalGrid
More Components • Button • Image • Icons, etc.
Ready to take a deep dive?
Additional Resources • Jetpack Compose Tutorial on developer.android • Jetpack
Compose basics Codelab • Under the hood of Jetpack Compose • Get started with Jetpack Compose • Jetpack Compose basics | Workshop
Questions?
Thank You!