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Android 4.0 Platform Highlights. Article

A variety of new features greatly enhance the accessibility of Android 4.0
for
blind or visually impaired users. Most important is a new explore-by-touch
mode
that lets users navigate without having to see the screen. Touching the
screen
once triggers audible feedback that identifies the UI component below; a
second
touch in the same component activates it with a full touch event. The new
mode
is especially important to support users on new devices that use virtual
buttons
in the System Bar, rather than dedicated hardware buttons or trackballs.
Also,
standard apps are updated to offer an improved accessibility experience. The
Browser supports a script-based screen reader for reading favorite web
content
and navigating sites. For improved readability, users can also increase the
default font size used across the system.

The accessibility experience begins at first setup — a simple touch gesture
during setup (clockwise square from upper left) activates all accessibility
features and loads a setup tutorial. Once accessibility features are active,
everything visible on the screen can be spoken aloud by the standard screen
reader.

Source URL:
http://developer.android.com/sdk/android-4.0-highlights.html

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