XML垂直線不在真實設備上繪製

我有一個列表項目佈局，並且此佈局用於StickyListHeaderListView，並在圖像後面包含垂直分隔符。問題在於儘管在預覽屏幕上繪製了視圖分隔符，但從未在真實設備上繪製視圖分隔符。XML垂直線不在真實設備上繪製

下面是XML佈局代碼

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
     xmlns:tools="http://schemas.android.com/tools" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:minHeight="80dp" 
     android:paddingLeft="@dimen/padding_medium" 
     android:paddingRight="@dimen/padding_medium" 
     tools:ignore="MissingPrefix"> 

<TextView 
    android:id="@+id/textview_date" 
    fontPath="@string/font_semi_bold" 
    android:layout_width="wrap_content" 
    android:maxWidth="60dp" 
    android:layout_height="match_parent" 
    android:layout_centerVertical="true" 
    android:gravity="center_vertical|right" 
    android:textAppearance="@android:style/TextAppearance.Holo.Medium" 
    android:textColor="#999999" 
    tools:text="21\nFeb" /> 

<RelativeLayout 
    android:id="@+id/container" 
    android:layout_width="wrap_content" 
    android:layout_height="match_parent" 
    android:layout_toRightOf="@+id/textview_date" 
    android:minWidth="50dp" 
    android:paddingLeft="@dimen/padding_extra_small" 
    android:paddingRight="@dimen/padding_extra_small"> 

    <View 
     android:layout_width="1px" 
     android:layout_height="match_parent" 
     android:layout_centerHorizontal="true" 
     android:background="#999999" /> 
    <ImageView 
     android:layout_width="40dp" 
     android:layout_height="40dp" 
     android:layout_alignParentTop="true" 
     android:layout_marginTop="@dimen/margin_small" 
     android:src="@drawable/test_event_cat_1" /> 
</RelativeLayout> 

<TextView 
    android:id="@+id/textview_event_name" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:layout_toRightOf="@+id/container" 
    android:layout_marginTop="@dimen/margin_small" 
    android:textColor="#999999" 
    fontPath="@string/font_medium" 
    tools:text="ACS Nights’ Soccer Finale" 
    android:textAppearance="@android:style/TextAppearance.Holo.Medium" /> 
<TextView 
    android:id="@+id/textview_interval" 
    android:layout_width="match_parent" 
    android:textAppearance="@android:style/TextAppearance.Holo.Small" 
    android:layout_alignLeft="@+id/textview_event_name" 
    android:layout_below="@id/textview_event_name" 
    android:layout_marginTop="@dimen/margin_small" 
    android:textColor="#999999" 
    tools:text="4:00 PM - 6:00 PM" 
    android:layout_height="wrap_content" /> 
</RelativeLayout>

該代碼中的Android Studio中

Android Studio Preview Output