Hello android
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This document provides an overview of Android including: - Android architecture and core components like Activities, Services, BroadcastReceivers and ContentProviders - The application development process including resources, layouts, and the manifest - Common software used for developing Android apps like the SDK, Eclipse, and testing tools - A brief discussion of app deployment and common issues The document serves as a high-level introduction to developing Android applications.
![ContentProvider
http://developer.android.com/reference/android/content/ContentProvider.html
The primary methods that need to be implemented are:
● onCreate() which is called to initialize the provider
● query(Uri, String[], String, String[], String) which returns data to the
caller
● insert(Uri, ContentValues) which inserts new data into the content
provider
● update(Uri, ContentValues, String, String[]) which updates existing data
in the content provider
● delete(Uri, String, String[]) which deletes data from the content
provider
● Why is it need?
● See also ContentResolver, SQLiteOpenHanhler,
SQLiteDatabase, SQLiteQueryBuilder, Cursor,
ManagedCursor.
11](https://image.slidesharecdn.com/helloandroid-120806232534-phpapp01/85/Hello-android-11-320.jpg)
Hello android
- 1. OSLL Hello Android Vasily Romanikhin 1 vasily.romanikhin@gmail.com
- 2. Table of content ● About Android ● Android Architecture ● Application Fundamentals ● Activity, Service, ContentProvider, BroadcastReceiver, Intent classes ● Application Resources ● User Interface ● Software for developing ● Practice 2
- 3. What is Android? ● Android Inc. ● Open Handset Alliance (OHA) ● September 23, 2008 ● October 21, 2008 3
- 4. Android Architecture 4
- 5. The project structure MyProject/ ✔ src/ src/ MyActivity.java ✔ res/ res/ drawable/ ✔ drawable/ icon.png ✔ layout/ layout/ main.xml ✔ values/ values/ strings.xml ✔ gen/ raw/ libs/ ✔ AndroidManifest.xml ... assets/ ... gen/ R.java 5 AndroidManifest.xml
- 6. Application Fundamentals ● Application Components: ● Activities ● Services ● Broadcast receivers ● Content providers ● ~ Intent 6
- 7. Activity http://developer.android.com/reference/android/app/Activity.html ● protected void onCreate(Bundle savedInstanceState); ● protected void onStart(); ● protected void onRestart(); ● protected void onResume(); ● protected void onPause(); ● protected void onStop(); ● protected void onDestroy(); 7
- 8. Service http://developer.android.com/reference/android/app/Service.html ● startService(...) ● stopService(...) ● bindService(...) ● unbindService(...) 8
- 10. BroadcastReceiver http://developer.android.com/reference/android/content/BroadcastReceiver.ht ml ● public void onReceive(Context context, Intent intent) {/* Actions … */} ● Before using BR you should register it (dynamically – in code; or statically – in AndroidManifest.xml) ● The most often used with Service 10
- 11. ContentProvider http://developer.android.com/reference/android/content/ContentProvider.html The primary methods that need to be implemented are: ● onCreate() which is called to initialize the provider ● query(Uri, String[], String, String[], String) which returns data to the caller ● insert(Uri, ContentValues) which inserts new data into the content provider ● update(Uri, ContentValues, String, String[]) which updates existing data in the content provider ● delete(Uri, String, String[]) which deletes data from the content provider ● Why is it need? ● See also ContentResolver, SQLiteOpenHanhler, SQLiteDatabase, SQLiteQueryBuilder, Cursor, ManagedCursor. 11
- 12. Process Lifecycle Foreground process Critical Priority Visible process High Priority Service process Background process Low Priority Empty process 12
- 13. AndroidManifest.xml http://developer.android.com/guide/topics/manifest/manifest-intro.html <activity> <intent-filter> <action /> <category /> <?xml version="1.0" <data /> encoding="utf-8"?> </intent-filter> <manifest> <meta-data /> <uses-permission /> </activity> <permission /> <activity-alias> <permission-tree /> <intent-filter>...</intent-filter> <permission-group /> <meta-data /> <uses-sdk /> </activity-alias> <uses-configuration /> <service> <uses-feature /> <intent-filter>...</intent-filter> <supports-screens /> <meta-data/> <compatible-screens /> </service> <supports-gl-texture /> <receiver> <application> <intent-filter>...</intent-filter> ... <meta-data /> </application> </receiver> </manifest> <provider> <grant-uri-permission /> <meta-data /> </provider> 13
- 14. Application Resourses res/ MyProject/ ● anim/ src/ MyActivity.java ● color/ res/ drawable/ ● drawable/ icon.png layout/ ● layout/ main.xml values/ ● menu/ strings.xml raw/ ● values/ gen/ R.java ● xml/ ● raw 14
- 15. Application Resources res/ drawable/ icon.png background.png drawable-hdpi/ icon.png background.png 15
- 17. User Interface ● Runtime (programmically) ● Xml layout file (ex: res/layout/main.xml) ● ViewGroup ● View 17
- 18. Example layout file 18
- 19. DDMS DDMS (Dalvik Debug Monitoring Service) provides: ● thread and heap information on the device ● logcat ● process ● radio state information ● incoming call and SMS spoofing ● location data spoofing ● screen capture on the device and more. 19
- 20. Application Testing TestCase JUnit Project Test Project AndroidTestCase tested.project.dir=./.. ServiceTestCase ProviderTestCase2 adb shell monkey p ru.spb.osll.fileman ApplicationTestCase ager v 500 20
- 21. Required software ● JDK >= 1.5 ● Android SDK (http://developer.android.com/sdk/index.html) ● Adding Platforms and Other Components ● Android NDK (http://developer.android.com/sdk/ndk/index.html) ● Ant >= 1.7 Eclipse (http://www.eclipse.org/downloads/) ADT (http://developer.android.com/sdk/eclipseadt.html) 21
- 22. Adding Platforms and Other Components ● androidsdk<...>/tools/android (Linux or Mac) ● SDK Manager.exe (Windows) Result: ● AVDs ● USB Drivers ● ... 22
- 23. Troubles ● Problems with jdk (don't use openjdk) ● ia32libs (aptget install ia32libs) ● Developing on a Device ● USB Vendor IDs (for Linux or Mac) Device ???? ● USB Driver (for Windows) 23
- 24. Practice ● ExampleButton ● ExampleButtonExt ● ExStackActivity ● ExService ● ExBroadcastReceiver 24
- 25. What is remained... ● Storage data ● Internal, External Storage ● DB ● SharedPreferences ● Designing for Performance 25
- 26. ● Questions... ??? ● Thanks! 26