How to download url file from firebase firestore flutter?

Question

How can I download a file from firebase firestore after I push the url from firebase storage to firebase firestore? I try to display the list of audio file. But how to download the file from firestore?

Future<List<DocumentSnapshot>> getAudioFile() async {
Map<String, dynamic> audios = {
  "audio": audio,
};

var docRef = FirebaseFirestore.instance.collection("Audio");
QuerySnapshot query = await docRef.limit(10).get();
return query.docs;

}

score 0 · Answer 1 · answered May 31 '21 at 11:35

0

Assuming the file you are trying to download is publicly readable, and if not you can read this documentation to make it so, all you have to is use the URL to download the file as follows:

var docRef = FirebaseFirestore.instance.collection("Audio");
QuerySnapshot query = await docRef.limit(10).get();
query.forEach((doc) async {
    // this variable will contain your downloaded file and you can build your code from here
    http.Response downloadData = await http.get(doc.url);
});

answered May 31 '21 at 11:35

Ralemos

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when i code query.forEach, the forEach is error. why? – fizahpanda103 Jun 01 '21 at 02:09
the forEach got the red line under the sentences – fizahpanda103 Jun 02 '21 at 01:28
but what is the error message? Can you edited that into your question? – Ralemos Jun 02 '21 at 12:38
maybe the query did not return any results? try adding a condition before the foreach, something like: `if(query.size() > 0)` – Ralemos Jun 04 '21 at 13:05
hmm still the same – fizahpanda103 Jun 08 '21 at 04:13
that is weird, what happens if you log the value of query? what comes up? – Ralemos Jun 10 '21 at 09:16
i cannot run the apps since the forEach statement is error – fizahpanda103 Jun 14 '21 at 02:16
try commenting out the whole forEach and log the value of query, let's troubleshoot this. – Ralemos Jun 14 '21 at 13:51
ow too log since the forEach statement is error and cannot debug the application. Im sorry i know nothing :( – fizahpanda103 Jun 16 '21 at 01:46
what do you mean with `too log since the forEach statement is error and cannot debug the application`? – Ralemos Jun 16 '21 at 12:15
im sorry. Cannot show the log since the forEach statement is error like the picture above and cannot debug the application – fizahpanda103 Jun 17 '21 at 05:31
like I said, if you comment out the entire foreach, you will be able to run... If you don't do this I won't be able to help you.... – Ralemos Jun 17 '21 at 09:46
I already add the output in the question. I want to download when i try the download button but idk how to do it. im sorry for the complicated things – fizahpanda103 Jun 18 '21 at 06:56

How to download url file from firebase firestore flutter?

1 Answers1