Android Development - Why Mobile?

Android Development
Why Mobile?
Dmytro Chupov, 2018

Topics Today
1. What is Android? Very brief history
2. Android Devices
3. What is needed to start
4. Languages & Frameworks
5. Mobile Projects vs Web/Enterprise projects
6. Platform support & Resources
7. Firebase
8. What makes a good Android Trainee?
9. Q & A
Dmytro Chupov, 2018

Quick Facts
 OS by Google
 Linux Kernel
 Started in 2003, bought by Google in 2005, released in 2008
 85% of mobile OS market
 35% of ALL devices with OS
Dmytro Chupov, 2018

10 Years of Android
From this: To this:
T-Mobile G1 (2008) Samsung Galaxy S9 (2018)
Dmytro Chupov, 2018

Android Devices
~ 2 300 000 000 devices
~ 11 000 models
7.x
6.x
5.x
8.x
Dmytro Chupov, 2018

Android Devices
Phones & Tablets
Dmytro Chupov, 2018
Android TV Android Auto
Wear OSAndroid Things Chrome OS

What is needed to start?
 Computer (Windows, Mac or Linux)
 Android device (optional)
 That’s all! 
Dmytro Chupov, 2018

What is needed to start?
 Computer (Windows, Mac or Linux)
 Android device (better to have one)
 That’s almost all! +
 Android Studio
 Emulators
 Java or Kotlin + OOP knowledge
 XML
 Basic Android platform knowledge
Dmytro Chupov, 2018

Languages & Frameworks
 Native Apps:
 Java
 Kotlin
Dmytro Chupov, 2018

Languages & Frameworks
 Native Apps:
 Java
 Kotlin
 Cross-platform Frameworks (Android + iOS):
 Apache Cordova (HTML, JavaScript, CSS) - https://cordova.apache.org/
 React Native (HTML, JavaScript, CSS) - http://www.reactnative.com/
 Flutter (Dart) - https://flutter.io/
 Ionic - https://ionicframework.com/
Dmytro Chupov, 2018

Native Apps & Cross-Platform Apps
Native apps
 Fast
 Small
 Responsive
 Native UI
 Beautiful
 Predictable behavior
Cross-platform apps
 Fast to develop
 More bugs
 Harder to debug
 Slow (+/-)
 Unpredictable
Dmytro Chupov, 2018

Mobile Projects
Dmytro Chupov, 2018
Write once, run anywhere

Mobile Projects
Dmytro Chupov, 2018
Write once… doesn’t compile next year

Mobile Projects
Dmytro Chupov, 2018
Write once… doesn’t compile next year
…which is actually a plus!

Mobile vs Web/Enterprise
Mobile Projects
 Small to medium scale
 Short-lived (mostly)
 Latest tools & technologies
 Often written from scratch
 Low memory
 Low power consumption
Web/Enterprise Projects
 Medium to large scale
 Long-lived
 Stable technology
 Legacy
 Usually use templates
 CRUD
Dmytro Chupov, 2018

Platform Support
 Great & simple guides
 Large Community (~ 9 million mobile devs, ~ 5 million Android devs)
 Android Jetpack
 Firebase
Dmytro Chupov, 2018

Firebase
 Mobile development platform by Google
 “Serverless” solutions
 Authentication
 Realtime Database
 Cloud Functions
 Cloud Storage
 Cloud Messaging
 Analytics
Dmytro Chupov, 2018

What makes a good Android Trainee?
Dmytro Chupov, 2018
1. Learn English
2. Objected-oriented programming principles
3. Java
4. Android Platform
5. Write Code
6. Have projects on Github

Becoming Developer on Your Phone
Dmytro Chupov, 2018
Open Settings,
find ‘About Phone’

Dmytro Chupov, 2018
Find ‘Software
information’

Dmytro Chupov, 2018
Find ‘Build number’

Click ‘Build number’ 7 times!
Dmytro Chupov, 2018

Dmytro Chupov, 2018
You are developer!

Developer Resources
 Android Developers: https://developer.android.com/
 YouTube channel: https://www.youtube.com/user/GoogleDevelopers
 Android Developers Blog: https://android-developers.googleblog.com/
 Material Design: https://material.io/design/
 Firebase: https://firebase.google.com/products/
 Stack Overflow (developer's best friend): https://stackoverflow.com/
Dmytro Chupov, 2018

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