android : diff b/w com.example.MyImageView and ImageView? -

//can explain me diff b/w these two? appreciate reply.

 <com.example.myimageview         android:id="@+id/image1"         android:src="@drawable/photo1"         android:layout_weight="50"          android:adjustviewbounds="true"         android:layout_width="wrap_content"         android:layout_height="fill_parent" />      <imageview         android:id="@+id/imageview1"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_weight="50"         android:src="@drawable/icon" /> 

one referring custom widget named com.example.myimageview. other referring standard android imageview widget.