flutter web upload image to firebase storage full code with explanations

 flutter web upload image to firebase storage full code with explanations

flutter web upload image to firebase storage full code with explanations

Here is an example of how to upload an image to Firebase Storage in Flutter web using the firebase_storage package:

import 'package:firebase_storage/firebase_storage.dart';

import 'dart:io';

class MyApp extends StatefulWidget {

  @override

  _MyAppState createState() => _MyAppState();

}

class _MyAppState extends State<MyApp> {

  final _storage = FirebaseStorage.instance;

  String _uploadedFileURL;

  void _uploadFile() async {

    // Open file picker and get file

    File file = await FilePicker.getFile();

    // Create a reference to the file in Firebase Storage

    StorageReference storageReference = _storage.ref().child("images/${file.path.split('/').last}");

    // Upload the file to Firebase Storage

    StorageUploadTask uploadTask = storageReference.putFile(file);

    // Wait for the upload to complete

    await uploadTask.onComplete;

    // Get the URL of the uploaded file

    _uploadedFileURL = await storageReference.getDownloadURL();

    setState(() {});

  }

  @override

  Widget build(BuildContext context) {

    return Scaffold(

      appBar: AppBar(

        title: Text('Firebase Storage Example'),

      ),

      body: Center(

        child: Column(

          mainAxisAlignment: MainAxisAlignment.center,

          children: <Widget>[

            _uploadedFileURL != null

                ? Image.network(_uploadedFileURL)

                : Text('No image selected'),

            FlatButton(

              onPressed: _uploadFile,

              child: Text('Upload Image'),

            ),

          ],

        ),

      ),

    );

  }

}

In this example, the _uploadFile function is called when the user taps the "Upload Image" button. This function uses the FilePicker.getFile() method to open the file picker and allow the user to select an image file. Once an image is selected, it creates a reference to the file in Firebase Storage by using the FirebaseStorage.instance.ref().child("images/${file.path.split('/').last}") .

Then we use the putFile method to upload the selected file to Firebase Storage, and the onComplete property is used to wait for the upload to complete. Once the upload is complete, we use the getDownloadURL method to get the URL of the uploaded file.

Finally, we set the state to update the UI and display the uploaded image.

This is a basic example of how to upload an image to Firebase Storage in Flutter web. You can customize it to fit your specific needs and add additional functionality, such as displaying a progress bar while the image is uploading. It's important to note that you need to set up your firebase project and add the firebase_storage package and also configure your firebase web setup before using this code snippet.