Introducing Android Platform
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The document discusses the core components and structure of the Android platform. It describes Android's core OS libraries, framework libraries, and application package (APK) structure. It also summarizes Android's foundational components including resources, intents, activities, and content providers. Resources can be XML-based or raw assets. Intents represent actions and data, and are used to start activities. Activities display screens to the user. Content providers allow accessing and sharing data through a URI-based interface.
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Introducing Android Platform
- 1. PRESENTATION Introducing ANDROID PLATFORM by Armen Polischuk
- 2. Android Structure Feb, 20 2011 Lohika
- 3. Core OS Libraries Feb, 20 2011 Lohika
- 4. Framework Libraries Feb, 20 2011 Lohika
- 5. APK Structure Feb, 20 2011 Lohika
- 6. Native APK Structure Feb, 20 2011 Lohika
- 8. Intents
- 9. Activities
- 10. Content Providers Feb, 20 2011 Lohika
- 12. Raw resources
- 13. Assets Feb, 20 2011 Lohika
- 15. Bitmaps
- 16. UI definitions
- 17. Colors, dimensions, strings, styles
- 18. Compiled XML files Feb, 20 2011 Lohika
- 19. Resolving Resources Directory structure: /res/values/(strings | colors | dimens | attrs | styles).xml /drawable/(*.png | *.jpg | *.gif) /anim/*.xml /layout/*.xml /raw/*.* /xml/*.xml /assets/*.*/*.* And suffixes: drawable-mcc310-en-rUS-large-long-port-mdpi-stylus-keyssoft-qwerty-dpad-v3 Feb, 20 2011 Lohika
- 21. Category
- 22. URI Feb, 20 2011 Lohika
- 25. Can be wired up with Intents
- 26. Or can be called from code Feb, 20 2011 Lohika
- 27. Activities – Intent Filter <activity android:name="..." android:label="...."> …… <intent-filter> <action android:name="android.intent.action.GET_CONTENT" /> <category android:name="android.intent.category.DEFAULT" /> <data android:mimeType="vnd.android.cursor.item/vnd..<pkg>..user" /> </intent-filter> … .. </activity> Feb, 20 2011 Lohika
- 30. Uses URI to retrieve data
- 31. Uses MIME types for data distinction Feb, 20 2011 Lohika
- 32. Data Providers - Examples Retrieve data: Cursor cursor = getContentResolver().query( uri, projection, where, sort); URI creation rules: content://com.<Company>.provider.<AppName>/<DataPath> MIME types: Single item - vnd.<companyName>.cursor.item/<contenttype> All items - vnd.<companyName>.cursor.dir/<contenttype> Feb, 20 2011 Lohika
- 33. Working Example Mercurial: http://eadditives.hg.sourceforge.net/hgweb/eadditives/eadditives/ Android Market: https://market.android.com/details?id=net.sf.additives Feb, 20 2011 Lohika
- 34. Docs & Publications Core Android Resources http://developer.android.com Feb, 20 2011 Lohika