Upload Image to Firebase Storage

gistfile1.txt

Future<Null> uploadFile(String filepath) async {
    final String fileName = '${DateTime.now().millisecondsSinceEpoch}.jpg';
    final ByteData bytes = await rootBundle.load(filepath);
    final Directory tempDir = Directory.systemTemp;
    final File file = File('${tempDir.path}/$fileName');
    file.writeAsBytes(bytes.buffer.asInt8List(), mode: FileMode.write);
    final StorageReference storageRef =
        FirebaseStorage.instance.ref().child('eventImages/$fileName');
    final StorageUploadTask task = storageRef.putFile(file);

    final Uri downloadUrl = (await task.future).downloadUrl;
    path = downloadUrl.toString();
  }
  
  // Think of it that the button works.
  
  floatingActionButton: FloatingActionButton.extended(
        backgroundColor: Colors.red[300],
        icon: Icon(Icons.create),
        label: Text("Create Event"),
        onPressed: () async {
            await uploadFile(_image.path);
          });
        },
      ),