设置一个view是否能在touch模式下获取焦点。

Boolean that controls whether a view can take focus while in touch mode.

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required属性用于表单验证(下面将详细介绍)过程中，autofocus属性允许选择页面上的元素以获取焦点。

The required attribute is used during form validation (more on that below) and the autofocus attribute lets you pick the element on the page too get focus.

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如果设置为true，当点击这个view时能获取焦点，如果别的焦点没有对这个属性（focusableInTouchMode）设置为true的话，这个view可以继续保持焦点。

If this is true for a view, that view can gain focus when clicked on, and can keep focus if another view is clicked on that doesn't have this attribute set to true.

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