Android 2.2 (Froyo) supports the following features:
Integration of Chrome’s V8 JavaScript engine into the Browser application
Advanced Microsoft Exchange support
Wi-Fi hotspot functionality
USB Tethering
Voice dialling and contact sharing over Bluetooth
Support for file upload fields in the Browser application
Animated GIFs supported in browser.
Adobe Flash 10.1 supported
Support for extra high DPI screens
Android 2.2 had two revisions. Android 2.2.1 was the first revision released in May 2010. Android 2.2.1 included some improvements and bug fixes. Improvements were mainly on Gmail application and Exchange Active Sync. It also received an update to Twitter and refreshed weather widget. Android 2.2.2 was released in June 2010. It was released mainly to address the email bug that randomly forward the text messages in the inbox. The email bug randomly select a recipient from the contact list and forward a random message in the inbox on its own. This bug was fixed with the Android 2.2.2 update.
Android 2.3 (Gingerbread) supports the following features in addition to existing 2.2 features:
New user interface design with new themes (Black themes save power)
Extra Large Screen Size supported
SIP Communication Supported (SIP Video and Audio Calling, In an operator point of view, this is feature will decrease their voice calling revenue where as user can call each other for lower rates or even free if they have good data connection)
Supports for NFC (High Frequency High Speech Data Transfer in short range)
Support for WebM/VP8 video playback, and AAC audio encoding
New audio effects such as reverb, equalization, headphone virtualization, and bass boost
Improved Copy and Paste functionality
Redesigned Multi Touch Software Keyboard
Audio, graphical, and input enhancements for game developers
New sensors support (i.e gyroscope)
Download manager for long running HTTP downloads
Enhanced support for native code
Improved power management and application control
Support for multiple cameras
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Difference Between Android 2.2 (Froyo) and Android 2.3 (Gingerbread)Click to expand...