주요한 변화는 아래와 같다. 그림을 통한 이해가 쉽다.^^
framework-level support for additional screen resolutions, like QVGA and WVGA
telephony APIs to support CDMA
gesture APIs
a text-to-speech engine
the ability to integrate with Quick Search Box
Quick Search Box Battery Usage Indicator New Android Market UI
New Camera/Camcorder UI
눈에 띄지 않는 변화들 요약
UI framework : New classes in animation and New XML attribute android:onClick from a layout file.
Search framework
Accessibility framework : New android.accessibility package and New AccessibilityService package
Gesture Input
Text-to-speech
Graphics : support scaling for different screen densities
Telephony : New SmsManager and other classes for sending and receiving SMS messages
Utilities : New DisplayMetrics fields for determining the density of the current device screen.
Android Manifest elements
New Permissions : CHANGE_WIFI_MULTICAST_STATE, GLOBAL_SEARCH, INSTALL_LOCATION_PROVIDER, READ_HISTORY_BOOKMARKS, WRITE_HISTORY_BOOKMARKS, RITE_EXTERNAL_STORAGE
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