I am using flutter, in Android Studio.

I am getting this in my console:

W/Firestore(26053): (24.2.2) [OnlineStateTracker]: Could not reach Cloud Firestore backend. Backend didn't respond within 10 seconds
W/Firestore(26053): 
W/Firestore(26053): This typically indicates that your device does not have a healthy Internet connection at the moment. The client will operate in offline mode until it is able to successfully connect to the backend.
E/flutter (26053): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: [cloud_firestore/unavailable] The service is currently unavailable. This is a most likely a transient condition and may be corrected by retrying with a backoff.
E/flutter (26053): #0      checkIfDocExists (package:crypto_app/Functions/firestorehelper.dart:29:5)
E/flutter (26053): <asynchronous suspension>
E/flutter (26053): #1      _MainPagesState._checkUsername (package:crypto_app/UI/mainpages.dart:63:21)
E/flutter (26053): <asynchronous suspension>
E/flutter (26053): 
W/Firestore(26053): (24.2.2) [WatchStream]: (a4a9ed6) Stream closed with status: Status{code=UNAVAILABLE, description=Channel shutdownNow invoked, cause=null}.

I have tried:

1. put <uses-permission android:name="android.permission.INTERNET" /> in all 3 AndroidManifest.xml files
2. put <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> in AndroidManifest.xml under main
3. Enabled Multidex
4. Used a different wifi connection
5. Checked back the second day with the same issue
6. My minimum SDK version is 21
7. Copied my code to a fresh new project

Here is my main function:

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp(
    name: 'Retrospect',
    options: DefaultFirebaseOptions.currentPlatform,
  );

  runApp(MyApp());
}

I should be initializing the app correctly, because I get his in my console:

I/FirebaseApp(26053): Device unlocked: initializing all Firebase APIs for app Retrospect
I/flutter (26053): Refreshing
W/DynamiteModule(26053): Local module descriptor class for com.google.android.gms.providerinstaller.dynamite not found.
I/DynamiteModule(26053): Considering local module com.google.android.gms.providerinstaller.dynamite:0 and remote module com.google.android.gms.providerinstaller.dynamite:0
W/ProviderInstaller(26053): Failed to load providerinstaller module: No acceptable module com.google.android.gms.providerinstaller.dynamite found. Local version is 0 and remote version is 0.

The problem could be caused by the line W/DynamiteModule(26053): Local module descriptor class for com.google.android.gms.providerinstaller.dynamite not found., that I was also unable to resolve.

Here are my pubspec.yaml file dependencies:

dependencies:
  flutter:
    sdk: flutter


  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^1.0.2
  firebase_core: ^1.20.1
  cloud_firestore: ^3.4.4
  http: ^0.13.4
  path_provider: ^2.0.11
  get_storage: ^2.0.3

I believe that I am using the latest versions of firebase_core and cloud_firestore.

My app/build.gradle file dependencies and plugins:

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'com.google.gms.google-services'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation "com.android.support:multidex:1.0.3"
    implementation 'com.google.android.material:material:1.6.1'
    implementation 'com.google.android.gms:play-services-ads:21.1.0'
    implementation platform('com.google.firebase:firebase-bom:30.3.2')
    implementation 'com.google.firebase:firebase-analytics-ktx'
    implementation 'com.google.firebase:firebase-storage-ktx'
}

My build.gradle file:

buildscript {
    ext.kotlin_version = '1.6.10'
    repositories {
        google()
        mavenCentral()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:7.1.2'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'com.google.gms:google-services:4.3.13'
    }
}

allprojects {
    repositories {
        google()
        mavenCentral()
    }
}

google-services.json file location:

Here are my rules in Firestore (rules should not be the problem because I was able to successfully read data using python.

rules_version = '2';
service cloud.firestore {
  match /databases/{database}/documents {
    match /{document=**} {
      allow read, write: if
          request.time < timestamp.date(2022, 12, 12);
    }
  }
}

Finally, here is the function I call:

import 'package:cloud_firestore/cloud_firestore.dart';

Future<bool> checkIfDocExists(String docId) async {
  try {
    // Get reference to Firestore collection
    var collectionRef = FirebaseFirestore.instance.collection('accounts');

    var doc = await collectionRef.doc(docId).get();
    return doc.exists;
  } catch (e) {
    throw e;
  }
}

What causes this error? (I am unable to access Cloud Firestore at all through flutter). I did not see my antivirus (Windows Defender) or Firewall block anything, but I can provide the logs if needed.

CodePudding user response：

I've faced the same issue in this days. I've been lloking for someone with the same problem but did not find enyone. Howevere, I've to download the google-services.json file again from my Firebase project application settings and seems it resolved the error. I don't see it anymore. But still facing the problem to fetch data by FutureBuilder. Hope it will help you

CodePudding user response：

I think that my problem is caused because I tried to overwrite another Firebase projects to my app.

If you are trying to add a different Firebase app and remove the first one from your flutter app, you should not simply delete the google-services.json file and add the second project's file. Please look online for how to change your Firebase project in your flutter app.

I could verify that my orignial Firebase app was still present by being able to access that project's cloud functions, and not my new Firebase project's.

Possible fixes with this issue:

• If you are not using Firestore excessively, you could try accessing data through cloud functions http invocation.

• You could also try to restart a new project and use the right Firebase project.