Android Workshop Day 2
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Day 2 of the Android workshop focused on creating and testing the GUI in ADT, coding activity transitions, and starting to implement the business logic of the application. Key topics covered included dealing with multiple screens across different densities, sizes, and orientations, using different layouts like linear, relative, and frame layouts to describe the UI in XML, listing items with ListView and GridView, changing styles, inflating views, and referencing GUI elements in code when transitioning between activities. The goal was to build out the application interface.
Android Workshop Day 2
- 1. Android Workshop Day 2 Android GUI Basics Senad Uka April 2014
- 3. Contents ● Goal of day 2 ● Multiple screens ● Layouts overview ● List view ● Changing styles ● Referencing GUI elements in code
- 4. Goal of Day 2 ● Create and test GUI in ADT ● Code activity transitions ● Homework: start implementing business logic of the application
- 5. Multiple screens ● Biggest issue ● Density ● Screen size ● Orientation ● Device independent pixels (dp)
- 7. Screen Size in dp ● xlarge screens are at least 960dp x 720dp ● large screens are at least 640dp x 480dp ● normal screens are at least 470dp x 320dp ● small screens are at least 426dp x 320dp
- 8. Describing UI in XML
- 10. In practice...
- 11. Linear Layout
- 12. Relative Layout
- 13. Frame Layout
- 14. ListView ● ListView is a view group that displays a list of scrollable items transformed into a view by an Adapter instance.
- 15. GridView ● GridView is a ViewGroup that displays items transformed into views by ListAdapter instance in a two-dimensional, scrollable grid.
- 16. Styling UI
- 17. Styling UI ● http://android-holo-colors.com/ ● Download and unzip into project directory
- 18. Inflating views