Android : Getting Started

Under the GDG Indore's Android: Idea to App program

Transcript

1. Android: Idea to App Code Lab - I - Dhatri Misra
2. Plan: > Finalising the features and Wireframes > Getting started with Development Environment > Understanding the Basics > Tap the keyboard a little
3. Check : > Development Environment Set? > Wireframes Ready?
4. The Development Environment > The workspace > Running the Emulator
5. Folder Structure src - Java Files //Activities gen - R.java *DO NOT TOUCH* assets - Additional Resources. Eg: Media, Fonts bin - Compiled java files libs - Libraries Needed //jar files res - Images, Layout, Menu
6. Android Architecture
7. Building Blocks 1. Activities 2. Intents 3. Views 4. Layouts 5. Android Manifest File 6. Services 7. Content Providers 8. Broadcast Receivers 9. Notifications
8. Activities > The screen that user interacts with > It has a UI > App has single main activity > App can have multiple activities > Activity has a lifecycle
9. Activity Lifecycle
10. Intents > Tells about the “Intention” of the App > Message Object to switch between activities > Pass data between activities > Can also communicate between two apps
13. Views > Basic building block of UI > Respond to events > Build up in tree structure > In XML under the layout
14. Action Bar Image button List View Image View Text View
15. Layouts Linear Relative Grid
16. Android Manifest File > Package name > Version > Activities, Services, Broadcast Receivers, Content Providers are included in the Application > Permissions > Minimum level of APIs > Libraries used
17. Services > Runs in the Background > May or May not have a UI > Runs in the same process as the activity > Run on a different thread > Have higher priority than Activities Eg : GPS, Perform file I/O, play music, interact with content provider
18. Service Lifecycle onCreate() - Service is created onStartCommand() - Service starts onDestroy() - Service stopped
19. Content Providers > Needed when you need to share data between multiple applications > Interface to connect data in one process with code running in another process > Android itself includes content providers that manage data such as audio, video, images, and personal contact information
21. Broadcast Receivers > Registers for a system or application event Eg: Battery Low, SMS Received, Wi-Fi activated/deactivated, Headset Plugged
23. Notifications > Message you display outside your app’s normal UI > Appears as an icon in notification area > To see the details of it opens the notification drawer > Sent via Notification Manager Eg : Message Received, Missed Call
24. What Next?