android:layout_toLeftOf 的问题

Question

 <TextView android:id="@+id/label"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_toRightOf="@id/divider"
android:layout_toLeftOf="@id/date"
        android:layout_alignParentBottom="true"
        android:layout_marginBottom="8dip"
        android:layout_marginTop="-10dip"        android:singleLine="true"
        android:ellipsize="marquee"
        android:textAppearance="?android:attr/textAppearanceSmall"
        android:textStyle="bold"
    />android:layout_toLeftOf   和  android:layout_toRightOf="@id/divider"  leftOf和righhtOf能同时用么？
原本label显示为mobile 10000的， 我把android:layout_toLeftOf="@id/date" 加上去以后10000就不显示了
是因为android:layout_toLeftOf  把android:layout_toRightOf="@id/divider"覆盖了么？还是怎么回事呢