res/layout/activity_picture_view.xml

<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"
    tools:context="com.caddi.android.caddipictureupload.PictureView">

    <com.caddi.android.caddipictureupload.ZoomableImageView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:id="@+id/imageViewDetail"
        android:layout_centerHorizontal="true"
        />

</RelativeLayout>
1	<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
2	xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
3	android:layout_height="match_parent"
4	tools:context="com.caddi.android.caddipictureupload.PictureView">
5
6	<com.caddi.android.caddipictureupload.ZoomableImageView
7	android:layout_width="fill_parent"
8	android:layout_height="fill_parent"
9	android:id="@+id/imageViewDetail"
10	android:layout_centerHorizontal="true"
11	/>
12
13	</RelativeLayout>