Post Description

New User Features

New Home screen tips widget assists new users on how to configure the home screen with shortcuts and widgets and how to make use of multiple home screens.

The Phone, applications Launcher, and Browser now have dedicated shortcuts on the Home screen, making it easy to access them from any of the 5 home screen panels.
Exchange support

Improved security with the addition of numeric pin or alpha-numeric password options to unlock device. Exchange administrators can enforce password policy across devices.

Remote wipe: Exchange administrators can remotely reset the device to factory defaults to secure data in case device is lost or stolen.

Exchange Calendars are now supported in the Calendar application.

Auto-discovery: you just need to know your user-name and password to easily set up and sync an Exchange account (available for Exchange 2007 and higher).

Global Address Lists look-up is now available in the Email application, enabling users to auto-complete recipient names from the directory.

Camera and Gallery


Gallery allows you to peek into picture stacks using a zoom gesture.

Camera onscreen buttons provide easy access to a new UI for controling zoom, flash, white balance, geo-tagging, focus and exposure. Camcorder also provides an easy way to set video size/quality for MMS and YouTube.

With the LED flash now enabled for the Camcorder, videos can be shot at night or in low light settings.
Portable hotspot

Certain devices like the Nexus One can be turned into a portable Wi-Fi hotspot that can be shared with up to 8 devices.

You can use your Android-powered phone as a 3G connection for a Windows or Linux laptop by connecting their phone to the computer with a USB cable. The connection is then shared between the two devices.

Multiple keyboard languages


Multi-lingual users can add multiple languages to the keyboard and switch between multiple Latin-based input languages by swiping across the space bar. This changes the keys as well as the auto-suggest dictionary.
Improved performance

Performance of the browser has been enhanced using the V8 engine, which enables faster loading of JavaScript-heavy pages.

Dalvik Performance Boost: 2x-5x performance speedup for CPU-heavy code over Android 2.1 with Dalvik JIT.

The graph to the right shows the performance speedup from Android 2.1 to Android 2.2 using various benchmark tests. For example, LinPack is now more than 5 times faster.

Kernel Memory Management Boost: Improved memory reclaim by up to 20x, which results in faster app switching and smoother performance on memory-constrained devices.

New Platform Technologies
Media framework

    * New media framework (Stagefright) that supports local file playback 
    * Continued support for OpenCore in Android 2.2

Bluetooth

    * Voice dialing over Bluetooth
    * Ability to share contacts with other phones
    * Support for Bluetooth enabled car and desk docks
    * Improved compatibility matrix with car kits and headsets

2.6.32 kernel upgrade

    * HIGHMEM support for RAM >256MB
    * SDIO scheduling and BT improvements

New Developer Services
Android Cloud to Device Messaging

Apps can utilize Android Cloud to Device Messaging to enable mobile alert, send to phone, and two-way push sync functionality.
Android Application Error Reports

New bug reporting feature for Android Market apps enables developers to receive crash and freeze reports from their users. The reports will be available when they log into their publisher account.
New Developer APIs
Apps on external storage

Applications can now request installation on the shared external storage (such as an SD card).
Media framework