이클립스로 앱을 하나 만드는데 탭구성하는데 오류가 안나는데 에뮬레이터 동작이 안되네요 ㅠ 어디가 잘못된걸까요 ㅜ

<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@android:id/tabhost"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >
<LinearLayout xmlns:adroid="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
   
  <LinearLayout
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:background="#0000FF"
       android:gravity="center"
       android:orientation="horizontal">
       <Button
           android:text="@string/strBtn1"/>
       <Button
           android:text="@string/strBtn2"/>
       </LinearLayout>
      
      
   
    <FrameLayout
        android:id="@android:id/tabcontent"
       android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_marginBottom="65dp">
        <TextView
            android:id="@+id/tab1"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="@string/strBtn3"/>
        <Textview
            android:id="@+id/tab2"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="@string/strBtn4"/>
        <TextView
            android:id="@+id/tab3"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="@string/strBtn5"/>
        <TextView
            android:id="@+id/tab4"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="@string/strBtn6"/>
    </FrameLayout>
    <TabWidget
        android:id="@android:id/tabs"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="-65dp"/>
   
    </LinearLayout>
   
    </TabHost>