activity_about.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center_horizontal"
    android:orientation="vertical"
    android:background="#FF000000"
    tools:context="in.co.whiznet.nurseryapp.About">
    <android.support.v7.widget.CardView
        app:cardElevation="0dp"
        app:cardCornerRadius="40dp"
        android:background="#FF000000"
        android:layout_marginBottom="15dp"
        android:layout_width="100dp"
        android:layout_height="100dp">
    <ImageView
        android:src="@drawable/my"
        android:background="#FF000000"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    </android.support.v7.widget.CardView>
    <TextView
        android:textStyle="bold|italic"
        android:text="Developed by"
        android:textSize="20dp"
        android:gravity="center"
        android:textColor="#ffffff"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <TextView
        android:textStyle="bold|italic"
        android:text="Nidhi Jaiswal"
        android:textSize="20dp"
        android:gravity="center"
        android:textColor="#ffffff"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <ImageView
        android:id="@+id/whiz"
        android:layout_marginTop="110dp"
        android:layout_gravity="center_horizontal"
        android:src="@drawable/whiznet"
        android:layout_width="180dp"
        android:layout_height="180dp" />
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="26dp"
        android:gravity="center"
        android:textColor="@color/Lettercolor"
        android:textStyle="italic|bold"
        android:text="WHIZNET TECHNOLOGIES"/>
</LinearLayout>