我正在尝试将数据写入Firestore。
我尝试了其他问题的解决方案。但无法解决问题。 这是终端输出和createData函数。
void createData() async {
print("*");
if (_formKey.currentState.validate()) {
print("**");
_formKey.currentState.save();
print("***");
DocumentReference ref = await db.collection('member').add({'Index': _indexNo, 'NIC': _nicNo,'Name':_name,'Faculty': _faculty,'Year':_year,'Telephone':_telephone});
setState(() => id = ref.documentID);
print(ref.documentID);
print('done');
}
}
I /颤振(18061):* I /颤振(18061):** I /颤振(18061):*** E / MethodChannel#plugins.flutter.io / cloud_firestore(18061):无法执行 处理方法调用 E / MethodChannel#plugins.flutter.io / cloud_firestore(18061): java.lang.NullPointerException:不存在Firestore组件。 E / MethodChannel#plugins.flutter.io / cloud_firestore(18061):在 com.google.common.base.Preconditions.checkNotNull(Preconditions.java:906) E / MethodChannel#plugins.flutter.io / cloud_firestore(18061):在 com.google.firebase.firestore.FirebaseFirestore.getInstance(com.google.firebase:firebase-firestore @@ 18.2.0:88) E / MethodChannel#plugins.flutter.io / cloud_firestore(18061):在 com.google.firebase.firestore.FirebaseFirestore.getInstance(com.google.firebase:firebase-firestore @@ 18.2.0:80) E / MethodChannel#plugins.flutter.io / cloud_firestore(18061):在 io.flutter.plugins.firebase.cloudfirestore.CloudFirestorePlugin.getFirestore(CloudFirestorePlugin.java:82) E / MethodChannel#plugins.flutter.io / cloud_firestore(18061):在 io.flutter.plugins.firebase.cloudfirestore.CloudFirestorePlugin.getDocumentReference(CloudFirestorePlugin.java:92) E / MethodChannel#plugins.flutter.io / cloud_firestore(18061):在 io.flutter.plugins.firebase.cloudfirestore.CloudFirestorePlugin.onMethodCall(CloudFirestorePlugin.java:533) E / MethodChannel#plugins.flutter.io / cloud_firestore(18061):在 io.flutter.plugin.common.MethodChannel $ IncomingMethodCallHandler.onMessage(MethodChannel.java:201) E / MethodChannel#plugins.flutter.io / cloud_firestore(18061):在 io.flutter.view.FlutterNativeView $ PlatformMessageHandlerImpl.handleMessageFromDart(FlutterNativeView.java:188) E / MethodChannel#plugins.flutter.io / cloud_firestore(18061):在 io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:202) E / MethodChannel#plugins.flutter.io / cloud_firestore(18061):在 android.os.MessageQueue.nativePollOnce(本机方法) E / MethodChannel#plugins.flutter.io / cloud_firestore(18061):在 android.os.MessageQueue.next(MessageQueue.java:323) E / MethodChannel#plugins.flutter.io / cloud_firestore(18061):在 android.os.Looper.loop(Looper.java:135) E / MethodChannel#plugins.flutter.io / cloud_firestore(18061):在 android.app.ActivityThread.main(ActivityThread.java:7331) E / MethodChannel#plugins.flutter.io / cloud_firestore(18061):在 java.lang.reflect.Method.invoke(本机方法) E / MethodChannel#plugins.flutter.io / cloud_firestore(18061):在 com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:1230) E / MethodChannel#plugins.flutter.io / cloud_firestore(18061):在 com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120) E / flutter(18061):[错误:flutter / lib / ui / ui_dart_state.cc(148)] 未处理的异常:PlatformException(错误,Firestore组件为 不存在。,null)E / flutter(18061):#0
StandardMethodCodec.decodeEnvelope (package:flutter / src / services / message_codecs.dart:564:7)E / flutter (18061):#1 MethodChannel.invokeMethod (package:flutter / src / services / platform_channel.dart:302:33)E / flutter (18061):E / flutter(18061):#2
DocumentReference.setData (文件:///home/mamba/Software/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.10.0/lib/src/document_reference.dart:43:30) E / flutter(18061):#3 CollectionReference.add (文件:///home/mamba/Software/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.10.0/lib/src/collection_reference.dart:58:23) E / flutter(18061):E / flutter(18061):#4
_addNewMemberState.createData(package:teamapp / Pages / addNewMember.dart:218:61)E / flutter(18061): E / flutter(18061):#5
_InkResponseState._handleTap(包:flutter / src / material / ink_well.dart:513:14)E / flutter(18061):#6 _InkResponseState.build。 (package:flutter / src / material / ink_well.dart:568:30)E / flutter(18061):
#7 GestureRecognizer.invokeCallback(包:flutter / src / gestures / recognizer.dart:120:24)E / flutter (18061):#8 TapGestureRecognizer._checkUp (包装:flutter / src / gestures / tap.dart:242:9)E / flutter(18061):#9
TapGestureRecognizer.acceptGesture (包装:flutter / src / gestures / tap.dart:204:7)E / flutter(18061):#10
GestureArenaManager.sweep (package:flutter / src / gestures / arena.dart:156:27)E / flutter(18061):#11 _WidgetsFlutterBinding&BindingBase&GestureBinding.handleEvent(package:flutter / src / gestures / binding.dart:218:20)E / flutter(18061):
#12 _WidgetsFlutterBinding&BindingBase&GestureBinding.dispatchEvent(package:flutter / src / gestures / binding.dart:192:22)E / flutter(18061):
#13 _WidgetsFlutterBinding&BindingBase&GestureBinding._handlePointerEvent(软件包:flutter / src / gestures / binding.dart:149:7)E / flutter(18061):
#14 _WidgetsFlutterBinding&BindingBase&GestureBinding._flushPointerEventQueue (package:flutter / src / gestures / binding.dart:101:7)E / flutter(18061):
#15 _WidgetsFlutterBinding&BindingBase&GestureBinding._handlePointerDataPacket (package:flutter / src / gestures / binding.dart:85:7)E / flutter(18061):
#16 _rootRunUnary(dart:async / zone.dart:1136:13)E / flutter(18061):#17 _CustomZone.runUnary(dart:async / zone.dart:1029:19) E / flutter(18061):#18 _CustomZone.runUnaryGuarded (dart:async / zone.dart:931:7)E / flutter(18061):#19 _invoke1 (dart:ui / hooks.dart:223:10)E / flutter(18061):#20
_dispatchPointerDataPacket(dart:ui / hooks.dart:144:5)
答案 0 :(得分:0)
喜欢这个。 删除android和ios目录,然后运行“ flutter create” https://github.com/flutter/flutter/wiki/Workarounds-for-common-issues#generated-project-files-outdated