我正试图在我的扑动项目中使用firebase云firestore
我想通过这种方式发送用户名
final DocumentReference reference = Firestore.instance.collection('users').document('info');
@override
void initState() {
reference.setData({'name':widget.username});
super.initState();
}
但我总是遇到这个问题
是因为我忘记了什么或我的代码是对的吗？运行窗口：
[ERROR:flutter/shell/common/shell.cc(184)] Dart Error: Unhandled exception:
E/flutter (19131): PlatformException(error, Firestore component is not present., null)
E/flutter (19131): #0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:551:7)
E/flutter (19131): #1 MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:292:18)
E/flutter (19131): <asynchronous suspension>
E/flutter (19131): #2 DocumentReference.setData (file:///C:/Users/Khaled/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.9.0+2/lib/src/document_reference.dart:46:30)
E/flutter (19131): #3 _Mainpage.initState (package:family_store/mainpage/mainpage.dart:25:15)
E/flutter (19131): #4 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3830:58)
E/flutter (19131): #5 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
E/flutter (19131): #6 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
E/flutter (19131): #7 Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
E/flutter (19131): #8 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
E/flutter (19131): #9 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
E/flutter (19131): #10 Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
E/flutter (19131): #11 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
E/flutter (19131): #12 Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
E/flutter (19131): #13 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
E/flutter (19131): #14 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
E/flutter (19131): #15 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
E/flutter (19131): #16 Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
E/flutter (19131): #17 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
E/flutter (19131): #18 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
E/flutter (19131): #19 Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
E/flutter (19131): #20 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
E/flutter (19131): #21 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
E/flutter (19131): #22 Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
E/flutter (19131): #23 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
E/flutter (19131): #24 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
E/flutter (19131): #25 Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
E/flutter (19131): #26 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
E/flutter (19131): #27 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
E/flutter (19131): #28 Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
E/flutter (19131): #29 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
E/flutter (19131): #30 Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
E/flutter (19131): #31 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
E/flutter (19131): #32 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3848:11)
E/flutter (19131): #33 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
E/flutter (19131): #34 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
E/flutter (19131): #35 Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
E/flutter (19131): #36 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
E/flutter (19131): #37 Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
E/flutter (19131): #38 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
E/flutter (19131): #39 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
E/flutter (19131): #40 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
E/flutter (19131): #41 Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
E/flutter (19131): #42 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
E/flutter (19131): #43 Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
E/flutter (19131): #44 ComponentElement._fir`
Logcat窗口：
2019-02-17 19:26:09.995 26233-26233/kbaq.familystore E/MethodChannel#plugins.flutter.io/cloud_firestore: Failed to handle method call
java.lang.NullPointerException: Firestore component is not present.
at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:787)
at com.google.firebase.firestore.FirebaseFirestore.zza(com.google.firebase:firebase-firestore@@17.1.1:86)
at com.google.firebase.firestore.FirebaseFirestore.getInstance(com.google.firebase:firebase-firestore@@17.1.1:78)
at io.flutter.plugins.firebase.cloudfirestore.CloudFirestorePlugin.getFirestore(CloudFirestorePlugin.java:82)
at io.flutter.plugins.firebase.cloudfirestore.CloudFirestorePlugin.getDocumentReference(CloudFirestorePlugin.java:92)
at io.flutter.plugins.firebase.cloudfirestore.CloudFirestorePlugin.onMethodCall(CloudFirestorePlugin.java:512)
at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:200)
at io.flutter.view.FlutterNativeView.handlePlatformMessage(FlutterNativeView.java:163)
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:325)
at android.os.Looper.loop(Looper.java:142)
at android.app.ActivityThread.main(ActivityThread.java:6944)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)
2019-02-17 19:26:10.579 4651-4651/? D/io_stats: !@ 8,0 r 10125543 434553904 w 8205894 179383648 d 838308 76817324 f 2264196 2262971 iot 16398040 14934520 th 392016 0 0 pt 0 inp 0 0 740999.148
2019-02-17 19:26:10.652 26233-26345/kbaq.familystore E/flutter: [ERROR:flutter/shell/common/shell.cc(184)] Dart Error: Unhandled exception:
PlatformException(error, Firestore component is not present., null)
#0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:551:7)
#1 MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:292:18)
<asynchronous suspension>
#2 DocumentReference.setData (file:///C:/Users/Khaled/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.9.0+2/lib/src/document_reference.dart:46:30)
#3 _Mainpage.initState (package:family_store/mainpage/mainpage.dart:25:15)
#4 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3830:58)
#5 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
#6 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
#7 Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
#8 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
#9 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
#10 Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
#11 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
#12 Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
#13 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
#14 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
#15 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
#16 Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
#17 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
#18 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
#19 Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
#20 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
#21 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
#22 Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
#23 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
#24 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
#25 Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
#26 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4860:14)
#27 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
#28 Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
#29 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
#30 Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
#31 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
#32 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3848:11)
#33 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
#34 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
#35 Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
#36 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
#37 Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
#38 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3701:5)
#39 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3696:5)
#40 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2950:14)
#41 Element.updateChild (package:flutter/src/widgets/framework.dart:2753:12)
#42 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3732:16)
#43 Element.rebuild (package:flutter/src/widgets/framework.dart:3547:5)
#44 ComponentElement._fir
pubspec.yaml
name: family_store
description: family store
# The following defines the version and build number for your application.
# A version number is three numbers separated by dots, like 1.2.43
# followed by an optional build number separated by a +.
# Both the version and the builder number may be overridden in flutter
# build by specifying --build-name and --build-number, respectively.
# Read more about versioning at semver.org.
version: 1.0.0+1
environment:
sdk: ">=2.0.0-dev.68.0 <3.0.0"
dependencies:
cloud_firestore: ^0.9.0+2
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_auth: ^0.8.1
google_sign_in: ^4.0.1
shared_preferences: ^0.5.1+1
dev_dependencies:
flutter_test:
sdk: flutter
# For information on the generic Dart part of this file, see the
# following page: https://www.dartlang.org/tools/pub/pubspec
# The following section is specific to Flutter.
flutter:
# The following line ensures that the Material Icons font is
# included with your application, so that you can use the icons in
# the material Icons class.
uses-material-design: true
# To add assets to your application, add an assets section, like this:
assets:
- assets/Coffee.jpg
- assets/Food.png
- assets/Juices.jpg
- assets/Sweets.jpg
- assets/textback.png
- assets/Divider.png
- assets/Icon.png
- assets/sectionback.png
- btn_gplus.png
- btn_mobile.png
# An image asset can refer to one or more resolution-specific "variants", see
# https://flutter.io/assets-and-images/#resolution-aware.
# For details regarding adding assets from package dependencies, see
# https://flutter.io/assets-and-images/#from-packages
# To add custom fonts to your application, add a fonts section here,
# in this "flutter" section. Each entry in this list should have a
# "family" key with the font family name, and a "fonts" key with a
# list giving the asset and other descriptors for the font. For
# example:
# fonts:
# - family: Schyler
# fonts:
# - asset: fonts/Schyler-Regular.ttf
# - asset: fonts/Schyler-Italic.ttf
# style: italic
# - family: Trajan Pro
# fonts:
# - asset: fonts/TrajanPro.ttf
# - asset: fonts/TrajanPro_Bold.ttf
# weight: 700
#
# For details regarding fonts from package dependencies,
# see https://flutter.io/custom-fonts/#from-packages
app/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 plugin: 'kotlin-android'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
android {
compileSdkVersion 28
sourceSets {
main.java.srcDirs += 'src/main/kotlin'
}
lintOptions {
disable 'InvalidPackage'
}
defaultConfig {
// TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
applicationId "kbaq.familystore"
minSdkVersion 16
targetSdkVersion 28
multiDexEnabled true
versionCode flutterVersionCode.toInteger()
versionName flutterVersionName
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
// TODO: Add your own signing config for the release build.
// Signing with the debug keys for now, so `flutter run --release` works.
signingConfig signingConfigs.debug
}
}
}
flutter {
source '../..'
}
dependencies {
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
implementation 'com.android.support:multidex:1.0.3'
implementation 'com.google.firebase:firebase-core:16.0.7'
}
apply plugin: 'com.google.gms.google-services'
android/gradle
buildscript {
ext.kotlin_version = '1.3.0'
repositories {
google()
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.3.0'
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
classpath ('com.google.gms:google-services:4.2.0') {
exclude group: 'com.google.guava', module: 'guava-jdk5'
}
}
}
allprojects {
repositories {
google()
jcenter()
}
}
rootProject.buildDir = '../build'
subprojects {
project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
project.evaluationDependsOn(':app')
}
task clean(type: Delete) {
delete rootProject.buildDir
}
apply plugin: 'com.google.gms.google-services'
我尝试了这个qinsxswpoi minshond的独奏
但没有奏效
您是否尝试降级cloud_firestore依赖项？我最近在这个主题上看过几篇帖子，所有帖子都使用cloud_firestore 9.0 + 2。
您可以像myFunc（）{}一样创建一个函数，并在此函数中设置云数据。之后调用initstate（）{}中的函数。
Flutter: Firestore component is not present
我遇到了这个问题，但在我的情况下，我没有指定cloud_firestore版本。相反，我离开了场地空的“cloud_firestore：”，正如官方的颤动 final DocumentReference reference = Firestore.instance.collection('users').document('info');
_myFunc() async {
reference.setData({'name':_userName.text}).whenComplete((){
print('Data updated in Cloud.');
});
}
void initState() {
_myFunc();
super.initState();
}
所解释的那样。但是，如果您未指定版本号，则似乎下载了最新版本号。然而，似乎最新版本与AndroidX不兼容，降级不起作用。
我通过在Android Studio中创建一个新的Flutter项目并在初始项目配置屏幕上启用Kotlin和Swift兼容性来解决了这个问题。
然后在pubspec.yaml中输入以下代码：
videos
此外，您的pubspec.yaml似乎没有firebase_core依赖项。
这是我的应用程序构建gradle：
dependencies:
firebase_core: 0.2.5+1
cloud_firestore: 0.8.2+3
这是我的项目构建gradle：
android {
compileSdkVersion 28
sourceSets {
main.java.srcDirs += 'src/main/kotlin'
}
lintOptions {
disable 'InvalidPackage'
}
defaultConfig {
// TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
applicationId "com.organization.app"
minSdkVersion 21
targetSdkVersion 28
versionCode flutterVersionCode.toInteger()
versionName flutterVersionName
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
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
}
}
}
//The following line must be placed at the end of the file
apply plugin: 'com.google.gms.google-services'
我知道这个解决方案可能不是最有效的解决方案。特别是，考虑到您可能必须创建一个新的Flutter项目。然而，一旦如上所述创建了新项目，您就可以将旧的Flutter飞镖文件复制到新文件中。
希望这可以帮助你。