android 在xml布局文件中 ImageView ImageButton出现警告

在定义一个ImageVIew ImageButton的时候

总是提示这个[Accessibility] Missing contentDescription attribute on image警告

原来这是ADT 16.0的新特性，在一些没有文本显示的控件里，如imageView和imageButton等，

ADT会提示你定义一个android:contentDescription属性，用来描述这个控件的作用。

所以

只要加上下面这个属性即可:

android:contentDescription="@string/desc"

英文原文如下，如有翻译的不对的地方，敬请批评指正。

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

android:contentDescription="@string/desc"

Android Lint support in ADT 16 throws this warning to ensure that image widgets provide a contentDescription

This defines text that briefly describes content of the view. This property is used primarily for accessibility. Since some views do not have textual representation this attribute can be used for providing such.

Non-textual widgets like ImageViews and ImageButtons should use the contentDescription attribute to specify a textual description of the widget such that screen readers and other accessibility tools can adequately describe the user interface.

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