Please help me to Upload a pdf document or url link to firebase

Question

Please help me to Upload a pdf document or url link to firebase in flutter.

 

I am able to follow "https://www.c-sharpcorner.com/article/upload-image-file-to-firebase-storage-using-flutter/"

 

and upload image file to firebase in flutter.

 

But How to upload a pdf documkent or url link to firebase in flutter. Please explain me in detail.

I am trying with file_picker but getting errors like

 

Launching lib\main.dart on Redmi Note 4 in release mode...

Running Gradle task 'assembleRelease'...

lib/main.dart:54:30: Error: No named parameter with the name 'fileExtension'.

type: _pickType, fileExtension: _extension);

^^^^^^^^^^^^^

/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/file_picker-1.13.3/lib/file_picker.dart:57:38: Context: Found this candidate, but the arguments don't match.

static Future> getMultiFilePath({

^^^^^^^^^^^^^^^^

lib/main.dart:57:30: Error: No named parameter with the name 'fileExtension'.

type: _pickType, fileExtension: _extension);

^^^^^^^^^^^^^

/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/file_picker-1.13.3/lib/file_picker.dart:29:25: Context: Found this candidate, but the arguments don't match.

static Future getFilePath({

^^^^^^^^^^^

lib/main.dart:98:27: Error: Getter not found: 'AUDIO'.

value: FileType.AUDIO,

^^^^^

lib/main.dart:102:27: Error: Getter not found: 'IMAGE'.

value: FileType.IMAGE,

^^^^^

lib/main.dart:106:27: Error: Getter not found: 'VIDEO'.

value: FileType.VIDEO,

^^^^^

lib/main.dart:110:27: Error: Getter not found: 'ANY'.

value: FileType.ANY,

^^^

 

I have followed  https://www.youtube.com/watch?v=BxGrECJ_tUo and   

https://www.c-sharpcorner.com/article/upload-image-file-to-firebase-storage-using-flutter

Please Clarify.