pickimage’ is deprecated and shouldn’t be used. use imagepicker.getimage() method instead

Declare your getImage method->

PickedFile imageFile;

Future getImage(int type) async {
  PickedFile pickedImage = await ImagePicker().getImage(
      source: type == 1 ? ImageSource.camera : ImageSource.gallery,
      imageQuality: 50);
  return pickedImage;
}

Display your Picked image in the container ->

Expanded(
  child: Container(
    decoration: BoxDecoration(
        image: DecorationImage(
            image: imageFile == null
                ? AssetImage('assets/illustrations/name_contact.png')
                : FileImage(File(imageFile.path)),
            fit: BoxFit.cover)),
  ),
),

Calling the GetImage Method->

new ListTile(
    leading: new Icon(
      Icons.photo_library,
    ),
    title: new Text(
      'Galary',
    onTap: () async {
      final tmpFile = await getImage(2);

      setState(() {
        imageFile = tmpFile;
      });
    }),

Similarly we can call GetImage method for Camera input with input index 1 .

All done!