Make notification divider exactly 1px in hdpi.

    <View

        android:layout_width="match_parent"

        android:layout_height="1dp"

        android:layout_height="@dimen/notification_divider_height"

        android:layout_alignParentBottom="true"

        android:background="@android:drawable/divider_horizontal_dark"

        />

    <dimen name="recents_thumbnail_bg_padding_top">7px</dimen>

    <dimen name="recents_thumbnail_bg_padding_right">6px</dimen>

    <dimen name="recents_thumbnail_bg_padding_bottom">6px</dimen>

    <!-- thickness (height) of each notification row, including any separators or padding -->

    <!-- Note: this is 64dip + 1px divider = 97px. -->

    <dimen name="notification_height">97px</dimen>

    <!-- thickness (height) of dividers between each notification row; see math for

         notification_height above -->

    <dimen name="notification_divider_height">1px</dimen>

</resources>

    <!-- gap on either side of status bar notification icons -->

    <dimen name="status_bar_icon_padding">0dp</dimen>

    <!-- thickness (height) of dividers between each notification row -->

    <dimen name="notification_divider_height">1dp</dimen>

</resources>