[Android]

Consegui configurar meu projeto android ao firebase, porém quando testo a cloud firestore não acontece nada. Estou tentando escrever um texto no banco de dados,porém, não se faz a gravação.

main:

import 'package:flutter/material.dart';
import 'package:cloud_firestore/cloud_firestore.dart';

void main(){

Firestore.instance
.collection("usuarios")
.document("pontuacao")
.setData({"carlos" : "80", "silvana": "340"});



runApp(App());


}

class App extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Container();
}
}


pubspec.yaml

version: 1.0.0+1

environment:
sdk: ">=2.1.0 <3.0.0"

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: ^0.1.2
firebase_core: ^0.4.4+3
cloud_firestore: ^0.13.4+2


App/build.gradle

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
localPropertiesFile.withReader('UTF-8') { reader ->
localProperties.load(reader)
}
}

def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
flutterVersionCode = '1'
}

def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
flutterVersionName = '1.0'
}

apply plugin: 'com.android.application'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"

android {
compileSdkVersion 28

lintOptions {
disable 'InvalidPackage'
}

defaultConfig {
// TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
applicationId "guerra.guerra"
minSdkVersion 16
targetSdkVersion 28
versionCode flutterVersionCode.toInteger()
versionName flutterVersionName
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
multiDexEnabled true
}

buildTypes {
release {
// TODO: Add your own signing config for the release build.
// Signing with the debug keys for now, so `flutter run --release` works.
signingConfig signingConfigs.debug
}
}
}

flutter {
source '../..'
}

dependencies {
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test:runner:1.1.1'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
implementation 'com.google.firebase:firebase-analytics:17.2.2'
}
apply plugin: 'com.google.gms.google-services'


Gradle/build.gradle

buildscript {
repositories {
google()
jcenter()
}

dependencies {
classpath 'com.android.tools.build:gradle:3.5.0'
classpath 'com.google.gms:google-services:4.3.3'
}
}

allprojects {
repositories {
google()
jcenter()
}
}

rootProject.buildDir = '../build'
subprojects {
project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
project.evaluationDependsOn(':app')
}

task clean(type: Delete) {
delete rootProject.buildDir
}


log

E/flutter ( 1511): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: ServicesBinding.defaultBinaryMessenger was accessed before the binding was initialized.
E/flutter ( 1511): If you're running an application and need to access the binary messenger before `runApp()` has been called (for example, during plugin initialization), then you need to explicitly call the `WidgetsFlutterBinding.ensureInitialized()` first.
E/flutter ( 1511): If you're running a test, you can call the `TestWidgetsFlutterBinding.ensureInitialized()` as the first line in your test's `main()` method to initialize the binding.
E/flutter ( 1511): #0 defaultBinaryMessenger.<anonymous closure> (package:flutter/src/services/binary_messenger.dart:76:7)
E/flutter ( 1511): #1 defaultBinaryMessenger (package:flutter/src/services/binary_messenger.dart:89:4)
E/flutter ( 1511): #2 MethodChannel.binaryMessenger (package:flutter/src/services/platform_channel.dart:140:62)
E/flutter ( 1511): #3 MethodChannel.setMethodCallHandler (package:flutter/src/services/platform_channel.dart:368:5)
E/flutter ( 1511): #4 new MethodChannelFirestore (package:cloud_firestore_platform_interface/src/method_channel/method_channel_firestore.dart:27:13)
E/flutter ( 1511): #5 FirestorePlatform.instance (package:cloud_firestore_platform_interface/cloud_firestore_platform_interface.dart:63:19)
E/flutter ( 1511): #6 new Firestore (package:cloud_firestore/src/firestore.dart:26:42)
E/flutter ( 1511): #7 Firestore.instance (package:cloud_firestore/src/firestore.dart:29:36)
E/flutter ( 1511): #8 main (package:guerra/main.dart:6:13)
E/flutter ( 1511): #9 _runMainZoned.<anonymous closure>.<anonymous closure> (dart:ui/hooks.dart:239:25)
E/flutter ( 1511): #10 _rootRun (dart:async/zone.dart:1126:13)
E/flutter ( 1511): #11 _CustomZone.run (dart:async/zone.dart:1023:19)
E/flutter ( 1511): #12 _runZoned (dart:async/zone.dart:1518:10)
E/flutter ( 1511): #13 runZoned (dart:async/zone.dart:1502:12)
E/flutter ( 1511): #14 _runMainZoned.<anonymous closure> (dart:ui/hooks.dart:231:5)
E/flutter ( 1511): #15 _startIsolate.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:307:19)
E/flutter ( 1511): #16 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:174:12)
E/flutter ( 1511):

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