Using themes is an excellent way to ensure consistency for your application's UI. Rather than fully define each style, Android provides a shortcut to let you use styles from the currently applied theme.
To do this you use ?android: rather than @ as a prefix to the resource you want to use. The following example shows a snippet of the preceding code but uses the current theme's text color rather than an external resource.
<EditText android:id="@+id/myEditText" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/stop_message" android:textColor="?android:textColor"
This technique lets you create styles that will change if the current theme changes, without your having to modify each individual style resource.
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