What is the difference between the two syntaxes?

Question

android:textAppearance="@android:style/TextAppearance.Small"
android:textAppearance="?android:textAppearanceSmall"

Both are giving the same result. Is there any difference in there compilation efficiency.

Possible duplicate of [Question mark (?) in XML attributes for Android](https://stackoverflow.com/questions/2733907/question-mark-in-xml-attributes-for-android) — alijandro, Sep 07 '17 at 11:07
1st is theme reference of inbuilt android lib and 2nd one is the attribute value — Sumit Kumar, Sep 07 '17 at 11:10

score 1 · Accepted Answer · answered Sep 07 '17 at 11:24

 android:textAppearance="@android:style/TextAppearance.Small"

is text style setting directly.

android:textAppearance="?android:textAppearanceSmall"

is the refrence text style that set value on this Activity or this TextView's Theme . Like this:

<style name="MyStyle">
<item name="textAppearanceSmall">@style/textStyle</item>
</style>

1 Answers1