Android：use xml to center some views，singleline textview and the right view will not disappear

gistfile1.txt

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="200dp"
    android:orientation="horizontal"
    tools:context="com.lugeek.dividertest.MainActivity">

    <RelativeLayout
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:background="#eeeeee"
        android:gravity="center">

        <!--contain singleline textview-->
        <RelativeLayout
            android:id="@+id/rl"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center">

            <TextView
                android:id="@+id/z"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_toLeftOf="@+id/y"
                android:singleLine="true"
                android:ellipsize="end"
                android:text="11111111111"/>
                
                <!--the textview below will not disappear-->
            <TextView
                android:id="@+id/y"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentRight="true"
                android:text="元"/>



        </RelativeLayout>

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@id/rl"
            android:layout_centerHorizontal="true"
            android:text="11111元"/>




    </RelativeLayout>
    <RelativeLayout
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="1">

    </RelativeLayout>
    <RelativeLayout
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="1">

    </RelativeLayout>
    <RelativeLayout
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="1">

    </RelativeLayout>

</LinearLayout>