[android-developers] resource identifier not found

i'm using textCursorDrawable in a layout.

i know that attribute is from api12+, so i put it in a folder named layout-v12.

still getting

error: No resource identifier found for attribute 'textCursorDrawable' in package 'android'

    <EditText android:id="@+id/text"
        android:inputType="textMultiLine"
        android:layout_width="fill_parent"
        android:textCursorDrawable="@null"        <<<<<<<<<<<<
        android:singleLine="false" />

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