activity_zoom_pich.xml

<?xml version="1.0" encoding="utf-8"?>
<example.com.zoompinch.widget.FrameTouch xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/backgroundZoom"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/black"
    android:orientation="vertical"
    android:layout_gravity="center">

    <ImageView
        android:id="@+id/photo"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"/>
</example.com.zoompinch.widget.FrameTouch>