如何使用 Firestore 在 Flutter 中更新密码

Question

大家好，我是 Flutter 的新手，我正在尝试根据存储在 Firestore 中的用户数据以及用户当前登录系统的情况来更新密码。任何人都知道如何根据登录系统的特定 ID 更新密码并在用户输入重复密码时对其进行验证？请帮忙。

代码

import 'package:flutter/material.dart';
import 'package:monger_app/localization/localization_constants.dart';
import 'package:monger_app/page/setting.dart';
import 'package:monger_app/theme/colors.dart';


class BackupSettings extends StatefulWidget {
  @override
  _BackupSettingsState createState() => _BackupSettingsState();
}

class _BackupSettingsState extends State<BackupSettings> {
  final _newpasswordController = TextEditingController();
  final _repeatpasswordController = TextEditingController();
  var _formKey = GlobalKey<FormState>();
  
  

  bool checkCurrentPasswordValid = true;
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(getTranslated(context, 'backup_text'),),
        elevation: 0,
        brightness: Brightness.light,
        backgroundColor: primary,
        leading: IconButton(
          onPressed: (){
            Navigator.pop(context, MaterialPageRoute(builder: (context) => Settings()));
          },
          icon: Icon(Icons.arrow_back_ios,
            size: 20,
            color: Colors.black,),
        ),
      ),
      body: SingleChildScrollView(
        child: Padding(
          padding: EdgeInsets.all(20.0),
          child: Column(
              key: _formKey,
                children: <Widget>[
                  Container(
                    child: TextFormField(
                        validator: (input) {
                          if (input.length < 8)
                            return 'Please Provide Minimum 8 Character';
                        },
                        decoration: InputDecoration(
                          labelText: getTranslated(context, 'new_password'),
                          labelStyle: TextStyle(color: Colors.grey),
                          prefixIcon: Icon(
                            Icons.lock,
                            color: secondary,
                          ),
                          focusedBorder: UnderlineInputBorder(
                            borderSide: BorderSide(color: secondary),
                          ),
                        ),
                        obscureText: true,
                        controller: _newpasswordController
                        ),
                  ),
                  Container(
                    child: TextFormField(
                      decoration: InputDecoration(
                        labelText: getTranslated(context, 'repeat_password'),
                        labelStyle: TextStyle(color: Colors.grey),
                        prefixIcon: Icon(
                          Icons.lock,
                          color: secondary,
                        ),
                        focusedBorder: UnderlineInputBorder(
                          borderSide: BorderSide(color: secondary),
                        ),
                      ),
                      obscureText: true,
                        controller: _repeatpasswordController,
                      validator: (value) {
                        return _newpasswordController.text == value
                            ? null
                            : "Please validate your entered password";
                      },
                    ),
                  ),
                  SizedBox(height: 20),
                  RaisedButton(
                    padding: EdgeInsets.fromLTRB(70, 10, 70, 10),
                    onPressed: (){
                      
                    },

                    child: Text(getTranslated(context, 'save_button'),
                        style: TextStyle(
                            color: Colors.white,
                            fontSize: 20.0,
                            fontWeight: FontWeight.bold)),
                    color: primary,
                    shape: RoundedRectangleBorder(
                      borderRadius: BorderRadius.circular(20.0),
                    ),
                  )
                ],
              ),
            ),
          ),
          );
  }
}

Answer 1

使用这个功能，

void _changePassword(String yourPassword) async{
    FirebaseUser user = await FirebaseAuth.instance.currentUser();
    user.updatePassword(yourPassword).then((_){
Firestore.instance.collection("users").document(user.uid).updateData(
         {
          "password" : _newpasswordController.text,
         }).then((_){
          print("Successfully changed password");
         });
    }).catchError((error){
      print("Error " + error.toString());
    });
  }

按下时，

    onPressed: (){
if(!_formKey.currentState.validate()){
return;
}
_formKey.currentState.save();
             _changePassword(_newpasswordController.text);      
        },