The document introduces Android programming and provides an overview of key concepts including: - Android applications are developed using Java and compiled into APK files to run on the Android operating system which uses a Linux kernel and Dalvik virtual machine. - The AndroidManifest.xml file contains app metadata and declares app components like activities, services, and permissions. - UI resources like layouts, drawables, and strings are organized by screen density in folders like res/layout-hdpi. Common layouts include LinearLayout and RelativeLayout. - Activities display app screens and follow a back stack model. Fragments allow modular reuse of UI. - Services run in the background, AsyncTask simpl

1. Introduction to Android Programming – Workshop Berglind Ósk Bergsdóttir CC-BY-SA 2012

2. Android applications Open development platform written in Java

3. The Android SDK tools compile the code into an Android package (.apk)

4. The Android operating system is a multi-user Linux system ( 2.6 ) in which each application is a different user.

5. Each process has its own instance of the Dalvik virtual machine.

6. Android Manifest.xml A must for every application in its root directory

7. Info about version number, min sdk version, install location

8. User permissions

9. Declare activities, services, broadcast receievers... launchMode, screenOrientation, theme: android:theme="@android:style/Theme.NoTitleBar"

10. UI – resources folder Xml layout files layout-hdpi, -mdpi, -ldpi, -land, -xlarge

11. LinearLayout, RelativeLayout Drawables drawable-hdpi, -mdpi, -ldpi Menus and context menus

12. Values strings

13. UI –LinearLayout

14. Activity Typically represents one screen

15. Must implement onCreate(Bundle savedInstanceState)

16. Needs a view (xml layout file) setContentView(R.layout.activity_layout )

17. When a new activity starts, it is pushed onto the back stack "last in, first out" ListActivity

18. Fragments (API level 11> = 3.0>)

20. Activity Starting an activity