[Accessibility] Missing contentdescription attribute on image

when using Eclipse to define a ImageView, always prompt for this [accessibility] Missing contentdescription attribute on image warning, although it can be ignored but always feel strange, On the Internet a search found that this is ADT 16.0 (I use ADT20.0) new features, in some non-text display of the control, such as ImageView and ImageButton, etc., ADT will prompt you to define an android: The ContentDescription property is used to describe the effect of this control. The English text is as follows:

Resolved this warning by setting attribute android:contentdescription for my ImageView

android:contentdescription= "@string/desc"

Android Lint Support on ADT throws this warning to ensure that image widgets provide a contentdescription

This defines text that briefly describes content of the view. Used primarily for accessibility. Since Some views does not have the textual representation this attribute can is used for providing such.

Non-textual widgets like Imageviews and imagebuttons should use the ContentDescription attribute to specify a textual desc Ription of the widget such that screens readers and other accessibility tools can adequately describe the user interface.

[Accessibility] Missing contentdescription attribute on image