<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<Button
android:id="@+id/launch_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Uruchom aparat"
android:textSize="@dimen/text_size"   />    
<ImageView
android:id="@+id/photo"
android:layout_width="match_parent"
android:layout_height="match_parent" />    
</LinearLayout>