This document provides an overview of key Android application components: Activity, Service, BroadcastReceiver, Intent, and ContentProvider. It describes what each component is used for, how they interact with each other via Intents, and some common lifecycle methods for Activities. It also provides examples of using ContentProviders to share data between applications via a content URI and permissions defined in the app manifest.

1. Android
@thorikawa

2. Soft ware Engineer, MTI Ltd.
android apps “music.jp”
Blog:
http://d.hatena.ne.jp/thorikawa/
FiremobileSimulator
http://firemobilesimulator.org/
(iPhone/iPad app)
t witter: @thorikawa

3. Android
Activity
Service
BroadcastReceiver
Intent
ContentProvider

4. Activity
Activity

5. Service

6. BroadcastReceiver
SD

7. Intent
Activity,Ser vice,BroadcastReceiver
URI

8. ContentProvider

9. action
User
Activity
Content
Provider
Service
Intent
BroadcastReceiver
Event

10. Activity

12. onCreate()
xml
Intent

13. onStart()

14. onResume()
Activity

15. onPause()
Activity

16. onStop()

17. onDestroy()
MediaPlayer.release()
WebView.destroy()

18. Activity
Intent
Activity.startActivity()
Activity.startActivityForResult()

19. 1 = 1 Activity

20. Service

21. 2
Context.startSer vice() Ser vice
Intent
Context.bindSer vice() Ser vice
RPC

22. startService() vs bindSer vice() + RPC
startSer vice() Intent
bindService() bind
RPC

23. startService()
Ser vice.onStart()
Intent

24. bindService()
bind
bind Ser vice

25. Broadcast Receiver

26. Intent action
onReceive() (Intent)
onReceive()

27. android.intent.action.PHONE_STATE
android.intent.action.BOOT_COMPLETED
android.intent.action.TIMEZONE_CHANGED
android.intent.action.MEDIA_REMOVED

28. App Widget BroadcastReceiver
onReceive()
onReceive()

29. Intent

30. Intent Intent
Intent
Activity
Intent
Activity

31. AndroidManifeset.xml Intent Filter
Intent
<intent-filter>
<action android:name="android.intent.action.PHONE_STATE" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<data android:mimeType="audio/*" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:scheme="http" />
<data android:host="example.com" />
</intent-filter>

33. Content Provider

34. Content Uri
(content:/ /
/ URL)

35. query
update
SQLite insert
delete
etc... Client
File Content Provider ex)Activity
Internet

36. content://media/
MediaProvider
content://media/external/images/
media
content://media/external/images/
media/1

37. ContentProvider ContentResolver

38. Uri imagesUri = Images.Media.getContentUri("external");
Cursor cursor = getContentResolver().query(
imagesUri, // Content Uri
new String[] { ImageColumns.TITLE }, //
null, //
null, //
null //
);
while(cursor.moveToNext()) {
...
}
corsor.close();

39. ContentProvider
ContentProvider

40. public class MyContentProvider extends ContentProvider {
@Override
public boolean onCreate() { //
...
}
@Override
public Uri insert(Uri uri, ContentValues values) {
...
}
@Override
public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
...
}
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
...
}
@Override
public String getType(Uri uri) { // Content Uri
...
}
@Override
public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
...
}
@Override
public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException { //
...
}
}

41. AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="a.b.c" android:versionCode="1" android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="x">
<provider android:name=".MyContentProvider"
android:authorities="hoge" />
</application>
<uses-sdk android:minSdkVersion="4" />
</manifest>
content://hoge/
MyContentProvider

42. My App Mail App
action: Intent.ACTION_SEND
extra: EXTRA_STREAM=content:/ /hoge/1
Intent
Activity Activity
query
openFile
Content Provider
authorities="hoge"

44. Activity
Activity

45. Android
Activity, Service, BroadcastReceiver, Intent,
ContentProvider
Intent ContentProvider