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.

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
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3. What is Android?
● Android Inc.
● Open Handset Alliance
(OHA)
● September 23, 2008
● October 21, 2008
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4. Android Architecture
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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
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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();
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8. Service
http://developer.android.com/reference/android/app/Service.html
● startService(...)
● stopService(...)
● bindService(...)
● unbindService(...)
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9. Service Implementation
example
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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
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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.
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12. Process Lifecycle
Foreground process Critical Priority
Visible process
High Priority
Service process
Background process
Low Priority
Empty process
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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>
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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
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16. Accessing Resources
/res/values/strings.xml
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17. User Interface
● Runtime (programmically)
● Xml layout file (ex: res/layout/main.xml)
● ViewGroup
● View
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18. Example layout file
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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.
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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
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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)
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22. Adding Platforms and Other
Components
● android­sdk<...>/tools/android (Linux or Mac)
● SDK Manager.exe (Windows)
Result:
● AVDs
● USB Drivers
● ...
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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)
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24. Practice
● ExampleButton
● ExampleButtonExt
● ExStackActivity
● ExService
● ExBroadcastReceiver
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25. What is remained...
● Storage data
● Internal, External Storage
● DB
● SharedPreferences
● Designing for Performance
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26. ● Questions... ???
● Thanks!
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