RaisedButton Replaced with ElevatedButton

 For Examples: 

ElevatedButton(

              style: ElevatedButton.styleFrom(

                primary: Colors.deepOrange, //This is a button color

                shape: RoundedRectangleBorder(

                  borderRadius: BorderRadius.circular(8.0),

                ),

              ),

              child: const Text(

                'Upload Image',

                style: TextStyle(

                  color: Colors.white,

                  fontSize: 22.0,

                ),

              ),

              onPressed: () => selectImage(context),

            ),

With an Icon button:

ElevatedButton.icon(

              onPressed: () {},

              icon: const Icon(

                Icons.my_location,

                color: Colors.white,

              ),

              label: const Text(

                'Use current Location',

                style: TextStyle(color: Colors.white),

              ),

              style: ElevatedButton.styleFrom(

                shape: RoundedRectangleBorder(

                  borderRadius: BorderRadius.circular(30.0),

                ),

                /// color declare in the style: instead and using primary

                primary: Colors.blue,

              ),

            ),