<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="vertical" >

    <ImageView 

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:id="@+id/image_view" 

    android:layout_gravity="center"

  />

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="horizontal" 

    android:gravity="top">

<Button

    android:layout_width = "wrap_content"

    android:layout_height = "wrap_content"

    android:id ="@+id/save"  

    android:text ="저장" />  

<Button

    android:layout_width = "wrap_content"

    android:layout_height = "wrap_content"

    android:id ="@+id/crop"

    android:text ="자르기"

    />

<Button

    android:layout_width = "wrap_content"

    android:layout_height = "wrap_content"

    android:id ="@+id/linecolor"

    android:text ="선색"

    />

<Button

    android:layout_width = "wrap_content"

    android:layout_height = "wrap_content"

    android:id ="@+id/undo"    

    android:text ="Undo"

    />

</LinearLayout>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="horizontal" 

    android:gravity="bottom">

    <Button

    android:layout_width = "wrap_content"

    android:layout_height = "wrap_content"

    android:id ="@+id/share"  

    android:text ="공유"  /> 

<Button

    android:layout_width = "wrap_content"

    android:layout_height = "wrap_content"

    android:id ="@+id/bbosasasi"

    android:text ="뽀샤시"

  />

<Button

    android:layout_width = "wrap_content"

    android:layout_height = "wrap_content"

    android:id ="@+id/black"

    android:text ="흑백"

/>

<Button

    android:layout_width = "wrap_content"

    android:layout_height = "wrap_content"

    android:id ="@+id/mozaik"    

    android:text ="모자이크"

/>

<Button

    android:layout_width = "wrap_content"

    android:layout_height = "wrap_content"

    android:id ="@+id/stiker"

    android:layout_toRightOf ="@+id/mozaik"

/>

</LinearLayout>

</LinearLayout>

제소스인데  상단에 버튼 중앙에 이미지뷰 하단에버튼 이렇게 배치할려고하는데 실행하면 상단 버튼만 나오네오;;;;

왜 이미지뷰량 하단버튼은 안나오나요 ?