How to make an image looks as it is?

How can I make the image looks at the same size as it is, for the PC, the picture looks bigger than it's shown in the mobile, which looks smaller.

Here it is

 <ImageView
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:src="@drawable/image" />