1. MOBILE PROGRAMMING Meriska Defriani, S.Komp, M.Kom Introduction
Informatics Engineering
High School of Technology Wastukancana Purwakarta

2. Why You Should Learn About Mobile Programming for Android ?
If you have the basic knowledge of programming, it will not difficult to learn about mobile programming
So many free tools, platforms, and frameworks so you don't need much modal to learn android
Android users are increasing so the offered applications also increase  Lot of opportunities to find work or make your own start up

3. Various Programming Languages for Mobile
Android : Java, Kotlin
iOS : Swift, Objective-C
Cross Platform : Javascript, C#, C, C++, Phyton, Ruby

4. Javascript
One of popular programming language among web developers that can be used to create mobile applications
One of 5 languages that are sought-after by companies

5. Javascript
The most famous javascript framework yang are Ionic and React Native
By using the framework we can publish applications that run on Android or iOS from one source

6. React Native One of javascript framework created by Facebook
The difference between React Native and Ionic:
React Native is intended to make a real native mobile applications while Ionic is intended to create WebApp applications
React Native will compile applications into native Android and iOS codes while Ionic will wrap applications in a browser

7. How React Native Work?
React Native works by embedding a Javascript file that has been bundled in the application, and running it locally from the application that we created. But we can also put Javascript files on the server and retrieve them when there is a connection. This allows us to update applications quickly without going through the process of submitting to Google Playstore or iOS Appstore.
For UI and UX, React Native uses Javascript. For styling, it is almost similar to CSS on the web, but with Camel Case.

10. How to Install React Native?

11. 1 - Expo
Expo is the easiest way to start building a new React Native application. It allows you to start a project without installing or configuring any tools to build native code - no Xcode or Android Studio installation required

12. 1 - Expo Install Node.Js : https://nodejs.org/en
Open the command prompt :
npm install –g expo-cli
expo init FirstProject
cd FirstProject
npm start/expo start
Open the FirstProject directory, the application can be modified by editing the App.js file

13. 1 - Expo
Install the Expo client app on your Android phone and connect to the same wireless network as your computer. On Android, use the Expo app to scan the QR code from your terminal to open your project.
Register your Expo account then Sign In

14. 2 – Native Code
Follow these instructions if you need to build native code in your project. For example, if you are integrating React Native into an existing application, or if you "ejected" from Expo or Create React Native App, you'll need this section.

15. Java SE Development Kit (JDK) https://www. oracle
Java SE Development Kit (JDK) *) jangan lupa untuk setting path jdk
pilih
Untuk windows 64bit

16. Node.js https://nodejs.org/en

17. Install Python melalui command prompt (cmd): C:\Users\ASUS>npm install python Install React Native Command Line Interface: C:\Users\ASUS>npm install –g react-native-cli

18. Install Android SDK trough Android Studio or independently This tutorial link may help you :

19. How to Run React Native Project Using Android Device?

20. Make a Project
C:\Users\ASUS>react-native init FirstProject
C:\Users\ASUS>cd FirstProject
*) FirstProject is the project name and also the directory where the project exist
*) open the project directory in drive C and open the aps.js file

21. Run the Project
Connect device with computer using USB cable. Activate Developer Mode and USB Debugging in Android device. Open cmd and run : C:\Users\ASUS>adb devices *)to check if the device has been detected by PC C:\Users\ASUS>react-native run-android

22. 3 – Expo Snack https://snack.expo.io/
Run the application with Expo Client App in Android Device
*)The device and PC must have internet connection