Reading data from Cloud Storage using Flutter web - flutter

Question

I am using a flutter web application (.dart), the aim is to read data from the Cloud Storage. I tried this but I keep getting null.
loadFromStorage() async {
print("Calling cloud function...");
final ref = FirebaseStorage.instance.ref().child('/data/ecg/hp2-1B72D3/1584859928685.ecg').getData(100).then((data) =>
setState(() {
imageBytes = data.toString();
})
);
print(imageBytes);
}
what is it that I am doing wrong?

Answer 1

Hi this is the method i use on web with package firebase
Future<String> uploadImage(
{#required Uint8List imageData, #required String productId}) async {
// print('FirebaseImageStorageRepositoryWeb.uploadImage() started');
StorageReference ref = firebase.storage().ref('Products').child(productId);
String imageUrl;
await ref.put(imageData).future.whenComplete(() async {
await ref.getDownloadURL().then((url) {
imageUrl = url.toString();
// print('image url is :$imageUrl');
return;
}).catchError((e) {
// print('FirebaseImageStorageRepositoryWeb.uploadImage() error: $e');
});
return;
});
return imageUrl;
}
#override
Future deleteImage({#required String productId}) async {
StorageReference ref = firebase.storage().ref('Products').child(productId);
ref.delete().whenComplete(() {
return;
}).catchError((e) {
print('FirebaseImageStorageRepositoryWeb.deleteImage() error: $e');
});
return;
}
And this is the device verision usin firebase_storage
final picker = ImagePicker();
Future<String> uploadImage(
{#required Uint8List imageData, #required String productId}) async {
// print('FirebaseImageStorageRepositoryDevice.uploadImage() started');
String imageUrl;
await ref.child('Products').child(productId).putData(imageData).onComplete.whenComplete(() async {
// print('FirebaseImageStorageRepositoryDevice.uploadImage() image uploaded');
await ref.child('Products').child(productId).getDownloadURL().then((url) {
// print('FirebaseImageStorageRepositoryDevice.uploadImage() getting imageUrl');
imageUrl = url;
// print('image url is :$imageUrl');
return;
}).catchError((e) {
// print('FirebaseImageStorageRepositoryDevice.uploadImage() error: $e');
});
return;
});
return imageUrl;
}
This should put you in the right direction