RelativeLayout in LinearLayout Problem

1<?xml version="1.0" encoding="utf-8"?>
2<LinearLayout android:orientation="vertical"
3 android:layout_width="fill_parent" android:layout_height="fill_parent"
4 xmlns:android="http://schemas.android.com/apk/res/android">
5 <RelativeLayout android:orientation="vertical"
6 android:background="#ff444444" android:paddingBottom="0.0dip"
7 android:layout_width="fill_parent" android:layout_height="wrap_content"
8 xmlns:android="http://schemas.android.com/apk/res/android">
9 <TextView android:textSize="12.0sp" android:textStyle="normal"
10 android:textColor="@color/white" android:gravity="left" android:id="@+id/app_count_title"
11 android:layout_width="wrap_content" android:layout_height="wrap_content"
12 android:layout_marginLeft="5.0dip" android:layout_marginTop="5.0dip"
13 android:layout_marginBottom="5.0dip" android:text="@string/app_count"
14 android:layout_alignParentLeft="true" android:layout_alignParentTop="true" />
15 <TextView android:textSize="12.0sp" android:textStyle="normal"
16 android:textColor="@color/white" android:gravity="left" android:id="@+id/app_count"
17 android:layout_width="wrap_content" android:layout_height="wrap_content"
18 android:layout_marginLeft="5.0dip" android:layout_marginTop="5.0dip"
19 android:layout_marginBottom="5.0dip" android:text="0"
20 android:layout_alignParentLeft="true" android:layout_alignParentTop="true" />
21 <TextView android:textSize="13.0sp" android:textStyle="bold"
22 android:textColor="@color/white" android:gravity="left" android:id="@+id/title_1"
23 android:background="#ff666666" android:paddingLeft="5.0dip"
24 android:paddingTop="2.0dip" android:paddingBottom="2.0dip"
25 android:layout_width="fill_parent" android:layout_height="wrap_content"
26 android:text="@string/installed_apps" />
27 </RelativeLayout>
28 <ListView android:id="@id/app_list_view" android:layout_width="fill_parent"
29 android:layout_height="0.0dip" android:layout_weight="1.0" />
30</LinearLayout>

1android_layout_toRightOf="@id/app_count_title"