Mobile development initiation

Mobile development initiation

Outline Mobile development: o Why? o How? o New issues Android ios 2

Mobile growth ¼ Internet access Sales of smartphones and tablets increase o + 70% tab Community 3

Why develop native app? One alternative: Hybrid HTML 5/Javascript o FirefoxOS o PhoneGap Issues o Not supported on every device o Poorer user interaction o Different look and feel o Performance 4

How develop native app? Two main choices: o Android : 75% (smartphone), 55% (tablet) o ios: 20% (smartphone), 40% (tablet) o Other: Windows Mobile, Blackberry 5

New issues Architecture / Security Life cycle Resources access o E.g. augmented user experience by customization Tools o Development o Testing 6

Outline Mobile development Android ios 7

Android 1st mobile OS Open source Linux kernel Java (C, C++) Current version 4.2 (API 17) 8

Android architecture Dalvik (JVM) Multitasking Isolation: sandbox Priviledges 9

Android app life cycle Memory and pover management Suspended app consumes no resources and responds quickly 10

Android components Activity = Screen Service = Background processing Broadcast Receiver Content Provider = Sharing/saving complex data 11

Android communication Intent Start components and share data Explicit/implicit o Explicit: component name -> application internal message o Implicit: blank name -> activate components in other app Intent filter o Intent the component is willing to receive o action/category/data 12

Android security Manifest file o Components o User permission (Internet access, read/write contacts, camera ) o App requirements Platform version Device features (camera, bluetooth ) If interaction with others app: o Intent filter o Permission 13

Android resource access User agreement at install time API: o Sensor: motion, environmental, position o Location: Google Maps o Multimedia: sound, video, Camera o Connectivity: Bluetooth, WiFi, SIP API o Phone capabilities: dial, address book 14

Android tools: Android Studio IDE based on IntelliJ IDEA 15

Android tools: SDK Android API + simulator + debugger Used with Android Developer Tools on Eclipse 16

Android tools: Layout 17

Android tools: Fragment 18

Android tools: Testing On real devices 19

Android tools: Testing Android simulator 20

Hello World! 21

Hello World! Android Src Gen o R.java Res: o Drawable o Layout o Values Manifest.xml 22

Hello World! Android Manifest.xml: 2 Screens -> 2 Activities 23

Hello World! Android Layout 24

Hello World! Android Add action when button clicked 25

Hello World! Android Get information and display 26

Hello World! 27

Outline Mobile development Android ios 28

ios Apple OS Proprietary Based on Darwin Objective C (C, C++) Version 7 (fall 2013) Few devices: 6 different screens/densities (phones + tablets) 29

ios architecture Isolation: Sandbox o API to interact with other app Mostly single tasking Exceptions: Background audio, voice over IP, background location, push notification 30

ios app life cycle 31

ios components (M)VC o View:.xib o Controller and Model:.h,.m Communication between View and Controller: o Target action: Link graphical control to an action 32

ios resource access Access to hardware/software by framework Information at install time User agreement at runtime 33

Apple IDE ios tools: Xcode Breakpoint and debugger console: o po for printing var o «po $eax» prints error and «po $ecx» the method which causes failure 34

ios tools: Layout 35

ios tools: Testing 36

ios tools: Testing 37

ios tools: Testing Loading an application onto the devices is only possible after paying an annual iphone Developer Program fee. Provisioning profile links App ID, Developer Certificates and Devices ID 38

Hello World! 39

Hello World! ios TestApp o AppDelegate o Supporting Files Info.plist Main.m Frameworks 40

Hello World! ios 41

Hello World! ios Add action when button clicked 42

Hello World! ios Get information and display 43

Hello World! ios 44

Conclusion Mobile development!= simple adaptation Interesting if real thinking on smartphone capacities and rich user interaction Layouts should be adapted to screen size, density and orientation Entry fee: Time and money! 45