Android Tutorial => ImageView ScaleType

Example

The image contained in the ImageView may not fit the exact size given to the container. In that case, the framework allows you to resize the image in a number of ways.

Center

    <ImageView android:layout_width="20dp"
           android:layout_height="20dp"
           android:src="@mipmap/ic_launcher"
           android:id="@+id/imageView"
           android:scaleType="center"
           android:background="@android:color/holo_orange_light"/>

This will not resize the image, and it will center it inside the container (Orange = container)