6

Possible Duplicate:
Question mark (?) in XML attributes for Android 

<TextView android:id="@+android:id/title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:singleLine="true"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:ellipsize="marquee"
        android:fadingEdge="horizontal" />

what does "?android:attr/textAppearanceLarge" do? Does it have a name? Why doesn't it use an "@" instead? Can I use this syntax in my own code? Where can I read more about this? Since I don't know what it is, it's kind of hard to find more information about it. Any guidance would be greatly appreciated.

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user123321
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2 Answers2

9

This question has already been asked on stackoverflow. The answer given was:

The question mark means it's a reference to a resource value in the currently applied theme.

Look here for more details.

Community
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lc2817
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4

It is a reference to style attribute. Check this reference:

References To Theme Attributes

Kash
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