Android 2.3 document Learning

Android 2.3 Platform

Http://androidappdocs.appspot.com/sdk/android-2.3.html
API Overview:
1. SIP-based VoIP
2. Near Field Communications (NFC)
3. gyroscope and other sensors (gyroscope: Gyroscope)
4. Multiple Cameras support
5. mixable audio effects
6. Download Manager
7. strictmode (it may be important for upper-level developers)
Http://androidappdocs.appspot.com/reference/android/ OS /StrictMode.html
Strictmode is a developer tool which detects things you might be doing by accident and brings them to your attention so you can fix them.
Strictmode is most commonly used to catch accidental disk or network access on the application's main thread, where UI operations are stored Ed and animations take place. keeping disk and network operations off the main thread makes for much smoother, more responsive applications. by keeping your application's main thread responsive, you also prevent ANR dialogs from being shown to users.

8. UI framework
9. Extra Large screens
10. Graphics
11. Content Providers
12. Location
13. Storage
14. Package Manager
15. Telephony
16.Native access to activity lifecycle, windows.(This is worth studying)
17. Dalvik Runtime
18. New manifest elements and attributes
19. New Permissions
20. New feature Constants

Android 2.3 Platform highlights

Http://androidappdocs.appspot.com/sdk/android-2.3-highlights.html
New features:
1. New User features:
Ui refinements for simplicity and speed
Faster, more intuitive text input
One-touch word selection and copy/paste
Improved Power Management
Control over applications
New ways of communicating, organizing
Internet calling
Near-Field Communications
Downloads Management
Camera

2. New developer features
(1). enhancements for gaming:
A). Performance: Concurrent Garbage Collector; faster event distribution; updated video drivers
B). Native input and sensor evnets
C). gyroscope and other new sensors, for improved 3D Motion Processing
D). Open API for Native audio
E). Native Graphics Management
F). Native access to activity lifecycle, Window Management
G). Native access to assets, storage
H). Robust Native Development Environment

(2). New forms of communication
A). Internet telephony
B). Near Field Communication (NFC)

(3). rich multimedia
A). mixable audio effects
B). Support for new media formats (Vp8 open video compression format and the webm open container format)
C). Access to multiple cameras

3. new platform technologies
(1 ). media framework
). New Media framework fully replaces opencore (major benefit)
B ). integrated Support for Vp8 and webm
C ). AAC encoding; AMR wideband encoding
(2) Linux kernel
2.6.35
(3) Networking
). SIP stack, which can be configured by the device manufacturer
B ). NFC
C ). bluez stack update
(4 ). dalvik runtime
). dalvik VM
B ). core libraries
C ). updated from upstream projects: OpenSSL 1.0.0a; bouncycastle 1.45; ICU 4.4; zlib 1.2.5