MOBILE APP DEVELOPMENT is an essential guide to understanding mobile app development, it gives a basic understanding of mobile app developemet for Android especially, It does not teach concisely but give you a cheat track to learning and understanding mobile development. It could be supplemented with Android Dev Docs, it helps make the learning and understanding of mobile app development easier. - echwood.com

1. APPMOBILE
BARNABAS UKWUANI
@ukwuani3
CESA Conf' 19
DEVELOPMENT

2. Why Mobile
5B
+
users
Almost every one has a SMART Phone
Android IOS
Kotlin/Java
$25 once
Free upkeep/analysis
Swift/Obj C
$99/annum
30% commision

3. Android
96%
smartphone
users
1 more Reach ! [newzoo.com]
2 Easy Development! [Native, Hybrid, CrossPlatform]
3 Large Support! [StackOverflow]
6 OpenGL and WebGL support + chromium engine!
5 Opensource!
7 Schorlarship! nanodegree {UDACITY}

4. Android App
Development
Install Android Studio
Design App
Test App
Upload App to Playstore
Maintain App

5. Freelance Developer
Developer [Ads, Subcriptions ]
Employed Developer
...
Android Opportunities

6. JAVAWho loves ?
KOTLIN
Language
fun main(args: Array<String>) {
println("Hello World!")
}
public class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello, World");
}
}
JAVA
function main() {
console.log("Hello World!")
}
JS

7. XML [drag and drop or Text]
Android SDK
Sqlite [Room]{local}
Firebase {local |
cloud}
Parse server {local |
cloud}
Realm {local | cloud}
CouchDB {local | cloud}
DatabaseDesign Pattern
UI/VIEW
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.c
om/...
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="sample Text"
android:layout_marginTop="15dp"
android:textSize="30dp"/>
• MVC
• MVVM [Google Adopted]
• MVP
• ...
Methodologies
• DevOps
• Kanban
• Scrum
• ...

8. Example with MVVM

9. Bring App to life with Animations
Tips
1
Make App use little data 2
Avoid duplication of data3
Optimize for speed 4
...5

10. Deploy to Google Play

11. Go to your Play Console [ create an account once with $25].
Select a default language and add a title for your app.
Type the name of your app as you want it to appear on Google

13. Create your app's store listing, take the content
rating questionnaire, and set up pricing and
distribution.

14. Questions ?
Thank
You