Android 2.2 announced ! API Level: 8

Android 2.2 is a minor platform release including user features, developer features, API changes, and bug fixes. For information on developer features and API changes, see the Framework API section.

修改幅度應該是像Cupcake –> Donut一樣,比較像是補充包 xD

待會來看一下Code來看有多少個Commit !
Android 2.2 Platform Highlights



1. 安裝APK到SD-card

可以在manifest裡面宣告 installLocation ("internalOnly", "preferExternal", and "auto")。

2. Data Backup

the Backup Manager handles the work of transporting the application data to and from the backup storage area in the cloud.

3. Gesture –> multitouch !!

New ScaleGestureDetector that lets Views detect and handle transformation gestures that involve more than one pointer (multitouch) using the supplied MotionEvents.

4. 新增的Permission

— Any device administration broadcast receiver must require this permission, to ensure that only the system can interact with it.

— Allows an application to call killBackgroundProcesses(String).

— Allows an application to set the system time.



1. Graphics

using ETC1 for texture compression. –> 不懂
enable compression from YUV to JPEG and manipulation of YUV data. –> 不懂

2. Audio的部份

New APIs in for managing audio focus, transport control, transient loss of audio focus, ducking. –> 不懂
New broadcast intent for routing audio to SCO –> SCO @@ 不懂

3. Speech recognition

the APIs are sufficient to integrate voice recognition deeply into an IME. –> Google說 我給你的API足夠你開發語音輸入!
New RecognizerIntent extras that let a requester app specify details as preferred language, minimum length in milliseconds, and so on.

4. Camera and camcorder

感覺每一版都會針對Camera動刀,而且還是大刀 。
這次有提到Changes to camera preview API to improve efficieny of preview pipeline. 希望真的有明顯的提昇。


感覺不多,原本印象中有要針對EAS做些改進,卻沒有在官方文件中提到@@ 到底有沒有補些什麼新功能呢?

1. Device policy manager

New device policy management APIs allow developers to write "device administrator" applications that can control security features of the device.

2. Accounts and sync

New method AddPeriodicSync() lets you schedule a periodic sync with a specific account, authority, and extras at the given frequency.

快來下載SDK來試試看吧 :)
Android 2.2 要來啦 ~
Android 2.2 and developers goodies.
Android 2.2 Froyo正式發表

其他Google I/O 文章:

Google I/O 2011 重點整理
2010年Google I/O Android 2.2 要來啦 ~


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