来自数据库的数据在 listview flutter 中不是 fetched/displayed
Data from database is not fetched/displayed in listview flutter
我有一个使用列表视图显示客户列表的屏幕。接下来，当我单击一个客户时，我只想在列表视图的下一个屏幕中显示该特定客户（customerId）的注释（记录）。这是我的代码，应该可以正常工作但不显示任何内容。我已经检查过 noteDetails table 是否包含数据并且它有。谁能告诉我哪里错了或者我应该添加什么代码。
main.dart
import 'package:flutter/material.dart';
import 'package:vers2cts/screens/user_login.dart';
void main() {
runApp(MyApp());
}
Map<int, Color> color ={50:Color.fromRGBO(170, 0, 95, .1),
100:Color.fromRGBO(170, 0, 95, .2),
200:Color.fromRGBO(170, 0, 95, .3),
300:Color.fromRGBO(170, 0, 95, .4),
400:Color.fromRGBO(170, 0, 95, .5),
500:Color.fromRGBO(170, 0, 95, .6),
600:Color.fromRGBO(170, 0, 95, .7),
700:Color.fromRGBO(170, 0, 95, .8),
800:Color.fromRGBO(170, 0, 95, .9),
900:Color.fromRGBO(170,0,95, 1),};
MaterialColor colorCustom = MaterialColor(0xFF880E4F, color);
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'NoteKeeper',
debugShowCheckedModeBanner: false,
theme: ThemeData(
primarySwatch:colorCustom,
primaryColor:colorCustom//primarySwatch: Colors.purple
),
home: UserLogin(),
);
}
}
Note_info.dart //这是我要显示特定客户注释的文件。
import 'dart:io';
import 'package:customer/models/CustomerNote.dart';
import 'package:customer/models/addCustomer.dart';
import 'package:customer/services/db_service.dart';
import 'package:customer/utils/database_helper.dart';
import 'package:flutter/material.dart';
import 'package:sqflite/sqflite.dart';
import 'New_Note.dart';
class Note_Info extends StatefulWidget{
final String appBarTitle;
final AddCustomer customer;
Note_Info(this. customer, this.appBarTitle);
@override
State<StatefulWidget> createState() {
return Note_InfoState(this. customer,this.appBarTitle);
}
}
class Note_InfoState extends State<Note_Info> {
DBService dbService = DBService();
List<CustomerNote> noteList;
int count = 0;
static final GlobalKey<ScaffoldState> scaffoldKey = new GlobalKey<ScaffoldState>();
CustomerNote note=CustomerNote();
String appBarTitle;
AddCustomer customer;
Note_InfoState(this.customer, this.appBarTitle);
DateTime _date = DateTime.now();
TextEditingController custNameController = TextEditingController();
@override
void initState() {
super.initState();
}
@override
Widget build(BuildContext context) {
int customerId=customer.custId;
if (noteList == null) {
noteList = List<CustomerNote>();
updateListView();
}
TextStyle titleStyle = Theme.of(context).textTheme.subhead;
var height = MediaQuery.of(context).size.height;
custNameController.text = customer.custName;
return DefaultTabController(
length: 4,
child: Scaffold(
appBar: AppBar(
actions: [
IconButton(
icon: Icon(
Icons.add,
),
onPressed: () {
Navigator.of(context).push(MaterialPageRoute(
builder: (BuildContext context) => NewNote(note)));
},
)
],
),
body: Container(
child: Column(
children: <Widget>[
TextField(controller: custNameController,
style: TextStyle(
fontSize: 20.0, fontWeight: FontWeight.bold),
textAlign: TextAlign.center),
Padding(
padding: const EdgeInsets.all(15.0),
child: Row(children: [
ImageProfile(customer.custPhoto),
Padding(
padding: const EdgeInsets.only(left: 30.0),
child: IconButton(
icon: Icon(
Icons.call,
color: Colors.green,
size: 45,
),
onPressed: () {
},
),
),
],),
),
SizedBox(
height: 50,
child: AppBar(
bottom: TabBar(
tabs: [
Tab(
text: "All",
),
Tab(
text: "Pending",
),
Tab(
text: "Cancelled",
),
Tab(
text: "Completed",
),
],
),
),
),
// create widgets for each tab bar here
Expanded(
child: TabBarView(
children: [
// first tab bar view widget
Container(
child: getNoteListView()
),
// second tab bar viiew widget
Container(
),
Container(
child: Center(
child: Text(
'Cancelled',
),
),
),
Container(
child: Center(
child: Text(
'Completed',
),
),
),
],
),
),
Padding(
padding: const EdgeInsets.all(8.0),
child: Container(
height: 55.0,
width: 200,
child: RaisedButton(
elevation: 2,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(20)),
color: Theme
.of(context)
.primaryColorDark,
textColor: Colors.white,
child: Text('Save', textScaleFactor: 1.5,),
onPressed: () {
setState(() {
//_reset();
});
},
),
),
),
]
),
)
));
}
Widget ImageProfile(String fileName) {
return Center(
child: CircleAvatar(
radius: 80.0,
backgroundImage: fileName == null
?AssetImage('images/person_icon.jpg')
:FileImage(File(customer.custPhoto))),
);
}
ListView getNoteListView() {
TextStyle titleStyle = Theme.of(context).textTheme.subhead;
return ListView.builder(
itemCount: count,
itemBuilder: (BuildContext context, int position) {
return Card(
color: Colors.white,
elevation: 2.0,
child: ListTile(
title: Text(this.noteList[position].note, style: titleStyle,),
trailing: GestureDetector(
child: Icon(Icons.delete, color: Colors.grey,),
onTap: () {
},
),
onTap: () {
},
),
);
},
);
}
void updateListView() {
final Future<Database> dbFuture = DB.init();
dbFuture.then((database) {
int cid=customer.custId;
Future<List<CustomerNote>> noteListFuture = dbService.getCustomerNotes(cid);
noteListFuture.then((noteList) {
setState(() {
this.noteList = noteList;
this.count = noteList.length;
});
});
});
}
}
New_Note.dart //这是在数据库中成功添加新笔记的地方
import 'package:customer/models/CustomerNote.dart';
import 'package:customer/models/addCustomer.dart';
import 'package:customer/screens/Note_info.dart';
import 'package:customer/services/db_service.dart';
import 'package:customer/utils/form_helper.dart';
import 'package:flutter/material.dart';
import 'package:flutter/painting.dart';
import 'package:table_calendar/table_calendar.dart';
import 'package:flutter_speed_dial/flutter_speed_dial.dart';
import 'package:smooth_star_rating/smooth_star_rating.dart';
import 'package:intl/intl.dart';
class NewNote extends StatefulWidget{
final CustomerNote note;
NewNote(this. note);
final Function(Color) onChanged;
final double height;
final double width;
NewNote({
Key key,
this.onChanged,
this.height = 25,
this.width = 150,
this.label,
}) : super(key: key);*/
@override
State<StatefulWidget> createState() {
return New_NoteState(this.note);
}
}
class New_NoteState extends State<NewNote> with SingleTickerProviderStateMixin{
New_NoteState(this.note);
CustomerNote note=new CustomerNote();
AddCustomer customer=new AddCustomer();
TextEditingController NoteController=TextEditingController();
TextEditingController custNameController = TextEditingController();
DateTime _reminderDate = DateTime.now();
DBService dbService=new DBService();
SpeedDial _speedDial(){
return SpeedDial(
animatedIcon: AnimatedIcons.add_event,
animatedIconTheme: IconThemeData(size: 24.0),
backgroundColor: Colors.yellow,
curve: Curves.easeInCirc,
children: [
SpeedDialChild(
child: Icon(Icons.location_on,color: Colors.yellow,),
label: 'Add Location',
),
SpeedDialChild(
child: Icon(Icons.keyboard_voice),
//backgroundColor: Colors.yellow,
label: 'Add voice',
//labelBackgroundColor: Colors.yellow
),
SpeedDialChild(
child: Icon(Icons.attachment_outlined,color :Colors.redAccent),
label: 'Add File',
),
SpeedDialChild(
child: Icon(Icons.image,color: Colors.lightBlue,),
label: 'Add Image',
),
],
);
}
//for DropDownMenu
Color value=Colors.red;
final List<Color> colors = [
Colors.red,
Colors.blue,
Colors.green,
Colors.yellow,
Colors.pink,
Colors.purple,
Colors.brown,
];
bool isSwitched = false;
var textValue = 'Switch is OFF';
void toggleSwitch(bool value) {
if(isSwitched == false)
{
setState(() {
isSwitched = true;
this.note.remindOn = _reminderDate.toString();
});
}
else
{
setState(() {
isSwitched = false;
});
}
}
@override
Widget build(BuildContext context) {
var height = MediaQuery.of(context).size.height;
var width = MediaQuery.of(context).size.width;
custNameController.text = customer.custName;
return WillPopScope(
onWillPop: () {
moveToLastScreen();
},
child: Scaffold(
appBar:AppBar(),
body:ListView(
children: <Widget>[
SizedBox(
height: 2.0,
),
TextField(controller: custNameController,
style: TextStyle(
fontSize: 20.0, fontWeight: FontWeight.bold),
textAlign: TextAlign.center),
Align(
alignment: Alignment.centerLeft,
child: Text("Add New",textAlign: TextAlign.left,
style: TextStyle(fontSize: 22,fontWeight: FontWeight.bold),),
),
SizedBox(
height: 2.0,
),
Divider(),
SizedBox(
height: 2.0,
),
Padding(
padding: const EdgeInsets.all(8.0),
child: TextField(
controller: NoteController,
decoration: InputDecoration(
border: OutlineInputBorder(
borderSide: const BorderSide(width: 2.0),)),
keyboardType: TextInputType.multiline,
minLines: 5,
maxLines: 5,
onChanged: (value) {
this.note.note = value;
},
),
),
TableCalendar(
selectedDayPredicate: (day) {
return isSameDay(_reminderDate, day);
},
onDaySelected: (selectedDay, focusedDay) {
setState(() {
_reminderDate = selectedDay;
});
},
focusedDay: DateTime.now(),
firstDay: DateTime.utc(2010, 10, 16),
lastDay: DateTime.utc(2030, 3, 14),),
SizedBox(
height: height*0.03,
),
Padding(
padding: const EdgeInsets.all(10.0),
child: Row(//mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
Text("Remind me",style: TextStyle(fontSize: 20),),
Padding(
padding: const EdgeInsets.only(left:80.0),
child: Container(
child: Switch(
onChanged: toggleSwitch,
value: isSwitched,
),
),
],),
),
Padding(
padding: const EdgeInsets.all(10.0),
child: Row(mainAxisAlignment: MainAxisAlignment.start,
children:<Widget>[
Text("Priority",style: TextStyle(fontSize: 20.0),),
Padding(
padding: const EdgeInsets.only(left:20.0),
child: Container(
child: SmoothStarRating(
size: height=50.0,
allowHalfRating: false,
onRated: (value) {
this.note.priority=value;
print("rating value -> $value");
},
),
),
)]),
),
Padding(
padding: const EdgeInsets.all(10.0),
child: Row(mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
Text("Color",style: TextStyle(fontSize: 20),),
Padding(
padding: const EdgeInsets.only(left:80.0),
child: Container(
child: DropdownButton<Color>(
value: value,
onChanged: (color) {
setState(() => value = color);
},
items: colors.map((e) => DropdownMenuItem(
value: e,
child: Container(
width: 60.0,
color: e,
),
),
)
.toList(),
),
),
),
],),
),
SizedBox(
height: height*0.08,
),
Padding(
padding: const EdgeInsets.all(8.0),
child: Container(
height: 55.0,
width: 200,
child: RaisedButton(
elevation: 2,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(20)),
color: Theme.of(context).primaryColorDark,
textColor: Colors.white,
child: Text('Save',textScaleFactor: 1.5,),
onPressed: (){
setState(() {
_save();
});
},
),
),
),
],
),
floatingActionButton:_speedDial(),
));
}
void moveToLastScreen() {
Navigator.pop(context, true);
}
void _save() async {
moveToLastScreen();
note.custId=customer.custId;
note.date = DateFormat.yMMMd().format(DateTime.now());
int result;
if (note.id != null) { // Case 1: Update operation
result = await dbService.updateNote(note);
} else { // Case 2: Insert Operation
result = await dbService.insertNote(note);
}
if (result != 0) { // Success
FormHelper.showAlertDialog(context,'Status', 'Note Saved Successfully');
} else { // Failure
FormHelper.showAlertDialog(context,'Status', 'Problem Saving Note');
}
}
}
db_service.dart
Future<bool> insertCustomer(AddCustomer model) async {
await DB.init();
bool isSaved = false;
if (model != null) {
int inserted = await DB.insert(AddCustomer.table, model);
isSaved = inserted == 1 ? true : false;
}
return isSaved;
}
Future<List<Map<String, dynamic>>> getCustomerMapList() async {
await DB.init();
var result = await DB.query(AddCustomer.table);
return result;
}
Future<List<AddCustomer>> getCustomerList() async {
var CustomerMapList = await getCustomerMapList();
int count = CustomerMapList.length;
List<AddCustomer> customerList = List<AddCustomer>();
for (int i = 0; i < count; i++) {
customerList.add(AddCustomer.fromMap(CustomerMapList[i]));
}
return customerList;
}
Future<int> insertNote(CustomerNote note) async {
await DB.init();
var result = await DB.insert(CustomerNote.table, note);
return result;
}
Future<List<CustomerNote>> getCustomerNotes(int customer) async {
await DB.init();
var res = await DB.rawQuery("noteDetails WHERE custId = '$customer'");
int count = res.length;
List<CustomerNote> notelist = List<CustomerNote>();
for (int i = 0; i < count; i++) {
notelist.add(CustomerNote.fromMap(res[i]));
}
return notelist;
}
database_helper.dart
import 'dart:async';
import 'package:customer/models/model.dart';
import 'package:path/path.dart' as p;
import 'package:sqflite/sqflite.dart';
abstract class DB {
static Database _db;
static int get _version => 1;
static Future<Database> init() async {
if (_db != null) {
return _db;
}
try {
var databasesPath = await getDatabasesPath();
String _path = p.join(databasesPath, 'Customer.db');
_db = await openDatabase(_path, version: _version, onCreate: onCreate);
print('db location:'+_path);
} catch (ex) {
print(ex);
}
}
static void onCreate(Database db, int version) async {
await db.execute(
'CREATE TABLE userDetails (id INTEGER PRIMARY KEY AUTOINCREMENT, '
'firstName STRING, '
'lastName STRING, mobileNum STRING, emailId STRING, address String,'
'userType STRING,password STRING)');
await db.execute(
'CREATE TABLE customerDetails (custId INTEGER PRIMARY KEY AUTOINCREMENT, '
'custName STRING, '
'mobileNum STRING, company STRING, custPhoto STRING, showOnCall bool,'
'remindOn STRING,location STRING)');
await db.execute(
'CREATE TABLE noteDetails (noteId INTEGER PRIMARY KEY AUTOINCREMENT, '
'custId STRING, '
'custName STRING, date STRING, note STRING, remindOn STRING,'
'priority STRING,status STRING,attachment STRING)');
await db.execute(
'CREATE TABLE languagesKnown(custId INTEGER REFERENCES customerDetails(custId),'
' languages STRING,PRIMARY KEY(custId))');
}
static Future<List<Map<String, dynamic>>> query(String table) async =>
_db.query(table);
static Future<int> insert(String table, Model model) async =>
await _db.insert(table, model.toMap());
static Future<int> update(String table, Model model) async => await _db
.update(table, model.toMap(), where: 'id = ?', whereArgs: [model.id]);
static Future<int> delete(String table, Model model) async =>
await _db.delete(table, where: 'id = ?', whereArgs: [model.id]);
static Future<int> deleteCustomer(String table, Model model) async =>
await _db.delete(table, where: 'custId = ?', whereArgs: [model.custId]);
static Future<Batch> batch() async => _db.batch();
static Future<List<Map<String, dynamic>>> rawQuery(String table) async =>
_db.query(table);
}
people_list.dart // 这是显示客户列表的地方，点击列表块即客户，Note_info 打开
import 'package:customer/models/addCustomer.dart';
import 'package:customer/screens/Note_info.dart';
import 'package:customer/screens/User_Settings.dart';
import 'package:customer/screens/add_person.dart';
import 'package:customer/services/db_service.dart';
import 'package:customer/utils/database_helper.dart';
import 'package:customer/utils/form_helper.dart';
import 'package:flutter/material.dart';
import 'dart:io';
import 'package:sqflite/sqflite.dart';
class People_List extends StatefulWidget{
@override
State<StatefulWidget> createState() {
return People_ListState();
}
}
class People_ListState extends State<People_List> with SingleTickerProviderStateMixin{
DBService dbService = DBService();
List<AddCustomer> customerList;
int count = 0;
static final GlobalKey<ScaffoldState> scaffoldKey = new GlobalKey<ScaffoldState>();
var _isSelectedItemIndex;
@override
void initState() {
super.initState();
_searchQuery = new TextEditingController();
}
Widget _buildTitle(BuildContext context) {
var horizontalTitleAlignment =
Platform.isIOS ? CrossAxisAlignment.center : CrossAxisAlignment.start;
return new InkWell(
onTap: () => scaffoldKey.currentState.openDrawer(),
child: new Padding(
padding: const EdgeInsets.symmetric(horizontal: 12.0),
child: new Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: horizontalTitleAlignment,
children: <Widget>[
const Text(''),
],
),
),
);
}
@override
Widget build(BuildContext context) {
var height = MediaQuery.of(context).size.height;
var width = MediaQuery.of(context).size.width;
if (customerList == null) {
customerList = List<AddCustomer>();
updateListView();
}
return Scaffold(
appBar: new AppBar(
),
body:getCustomerListView(),
floatingActionButton: FloatingActionButton(
onPressed: () {
navigateToCustomer(AddCustomer(), 'Add Person');
},
child: const Icon(Icons.add),
),
}
ListView getCustomerListView() {
TextStyle titleStyle = Theme.of(context).textTheme.subhead;
return ListView.builder(
itemCount: count,
itemBuilder: (BuildContext context, int position) {
var _imageFile=customerList[position].custPhoto;
return Card(
color: Colors.white,
elevation: 2.0,
child: ListTile(
leading: CircleAvatar(
backgroundImage: _imageFile==null?AssetImage('images/person_icon.jpg')
:FileImage(File(_imageFile.toString()))),
title: Text(this.customerList[position].custName, style: titleStyle,),
trailing: Icon(Icons.keyboard_arrow_right),
onTap: () {
navigateToDetail(this.customerList[position],'Edit ');
},
),
);
},
);
}
void navigateToDetail(AddCustomer customer, String title) async {
bool result = await Navigator.push(context, MaterialPageRoute(builder: (context) {
return Note_Info(customer, title);
}));
if (result == true) {
updateListView();
}
}
void updateListView() {
final Future<Database> dbFuture = DB.init();
dbFuture.then((database) {
Future<List<AddCustomer>> customerListFuture = dbService.getCustomerList();
customerListFuture.then((customerList) {
setState(() {
this.customerList = customerList;
this.count = customerList.length;
});
});
});
}
}
最后只好自己解决了。问题是我创建笔记并将其保存在“笔记”table cust_id 中的地方没有保存在 table 中。所以我将 CustomerModel 对象和 NoteModel 对象传递给 New_Note()。现在工作正常
new_note.dart
class NewNote extends StatefulWidget{
final NoteModel note;
final CustomerModel customer;
NewNote(this.customer,this. note);
@override
State<StatefulWidget> createState() {
//return New_NoteState(this.customer);
return New_NoteState(this.customer,this.note);
}
class New_NoteState extends State<NewNote> with SingleTickerProviderStateMixin{
New_NoteState(this.customer,this.note);
NoteModel note=new NoteModel();
CustomerModel customer=new CustomerModel();
}
void _save() async {
note.cust_id=customer.cust_id;
...
}
我有一个使用列表视图显示客户列表的屏幕。接下来，当我单击一个客户时，我只想在列表视图的下一个屏幕中显示该特定客户（customerId）的注释（记录）。这是我的代码，应该可以正常工作但不显示任何内容。我已经检查过 noteDetails table 是否包含数据并且它有。谁能告诉我哪里错了或者我应该添加什么代码。
main.dart
import 'package:flutter/material.dart';
import 'package:vers2cts/screens/user_login.dart';
void main() {
runApp(MyApp());
}
Map<int, Color> color ={50:Color.fromRGBO(170, 0, 95, .1),
100:Color.fromRGBO(170, 0, 95, .2),
200:Color.fromRGBO(170, 0, 95, .3),
300:Color.fromRGBO(170, 0, 95, .4),
400:Color.fromRGBO(170, 0, 95, .5),
500:Color.fromRGBO(170, 0, 95, .6),
600:Color.fromRGBO(170, 0, 95, .7),
700:Color.fromRGBO(170, 0, 95, .8),
800:Color.fromRGBO(170, 0, 95, .9),
900:Color.fromRGBO(170,0,95, 1),};
MaterialColor colorCustom = MaterialColor(0xFF880E4F, color);
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'NoteKeeper',
debugShowCheckedModeBanner: false,
theme: ThemeData(
primarySwatch:colorCustom,
primaryColor:colorCustom//primarySwatch: Colors.purple
),
home: UserLogin(),
);
}
}
Note_info.dart //这是我要显示特定客户注释的文件。
import 'dart:io';
import 'package:customer/models/CustomerNote.dart';
import 'package:customer/models/addCustomer.dart';
import 'package:customer/services/db_service.dart';
import 'package:customer/utils/database_helper.dart';
import 'package:flutter/material.dart';
import 'package:sqflite/sqflite.dart';
import 'New_Note.dart';
class Note_Info extends StatefulWidget{
final String appBarTitle;
final AddCustomer customer;
Note_Info(this. customer, this.appBarTitle);
@override
State<StatefulWidget> createState() {
return Note_InfoState(this. customer,this.appBarTitle);
}
}
class Note_InfoState extends State<Note_Info> {
DBService dbService = DBService();
List<CustomerNote> noteList;
int count = 0;
static final GlobalKey<ScaffoldState> scaffoldKey = new GlobalKey<ScaffoldState>();
CustomerNote note=CustomerNote();
String appBarTitle;
AddCustomer customer;
Note_InfoState(this.customer, this.appBarTitle);
DateTime _date = DateTime.now();
TextEditingController custNameController = TextEditingController();
@override
void initState() {
super.initState();
}
@override
Widget build(BuildContext context) {
int customerId=customer.custId;
if (noteList == null) {
noteList = List<CustomerNote>();
updateListView();
}
TextStyle titleStyle = Theme.of(context).textTheme.subhead;
var height = MediaQuery.of(context).size.height;
custNameController.text = customer.custName;
return DefaultTabController(
length: 4,
child: Scaffold(
appBar: AppBar(
actions: [
IconButton(
icon: Icon(
Icons.add,
),
onPressed: () {
Navigator.of(context).push(MaterialPageRoute(
builder: (BuildContext context) => NewNote(note)));
},
)
],
),
body: Container(
child: Column(
children: <Widget>[
TextField(controller: custNameController,
style: TextStyle(
fontSize: 20.0, fontWeight: FontWeight.bold),
textAlign: TextAlign.center),
Padding(
padding: const EdgeInsets.all(15.0),
child: Row(children: [
ImageProfile(customer.custPhoto),
Padding(
padding: const EdgeInsets.only(left: 30.0),
child: IconButton(
icon: Icon(
Icons.call,
color: Colors.green,
size: 45,
),
onPressed: () {
},
),
),
],),
),
SizedBox(
height: 50,
child: AppBar(
bottom: TabBar(
tabs: [
Tab(
text: "All",
),
Tab(
text: "Pending",
),
Tab(
text: "Cancelled",
),
Tab(
text: "Completed",
),
],
),
),
),
// create widgets for each tab bar here
Expanded(
child: TabBarView(
children: [
// first tab bar view widget
Container(
child: getNoteListView()
),
// second tab bar viiew widget
Container(
),
Container(
child: Center(
child: Text(
'Cancelled',
),
),
),
Container(
child: Center(
child: Text(
'Completed',
),
),
),
],
),
),
Padding(
padding: const EdgeInsets.all(8.0),
child: Container(
height: 55.0,
width: 200,
child: RaisedButton(
elevation: 2,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(20)),
color: Theme
.of(context)
.primaryColorDark,
textColor: Colors.white,
child: Text('Save', textScaleFactor: 1.5,),
onPressed: () {
setState(() {
//_reset();
});
},
),
),
),
]
),
)
));
}
Widget ImageProfile(String fileName) {
return Center(
child: CircleAvatar(
radius: 80.0,
backgroundImage: fileName == null
?AssetImage('images/person_icon.jpg')
:FileImage(File(customer.custPhoto))),
);
}
ListView getNoteListView() {
TextStyle titleStyle = Theme.of(context).textTheme.subhead;
return ListView.builder(
itemCount: count,
itemBuilder: (BuildContext context, int position) {
return Card(
color: Colors.white,
elevation: 2.0,
child: ListTile(
title: Text(this.noteList[position].note, style: titleStyle,),
trailing: GestureDetector(
child: Icon(Icons.delete, color: Colors.grey,),
onTap: () {
},
),
onTap: () {
},
),
);
},
);
}
void updateListView() {
final Future<Database> dbFuture = DB.init();
dbFuture.then((database) {
int cid=customer.custId;
Future<List<CustomerNote>> noteListFuture = dbService.getCustomerNotes(cid);
noteListFuture.then((noteList) {
setState(() {
this.noteList = noteList;
this.count = noteList.length;
});
});
});
}
}
New_Note.dart //这是在数据库中成功添加新笔记的地方
import 'package:customer/models/CustomerNote.dart';
import 'package:customer/models/addCustomer.dart';
import 'package:customer/screens/Note_info.dart';
import 'package:customer/services/db_service.dart';
import 'package:customer/utils/form_helper.dart';
import 'package:flutter/material.dart';
import 'package:flutter/painting.dart';
import 'package:table_calendar/table_calendar.dart';
import 'package:flutter_speed_dial/flutter_speed_dial.dart';
import 'package:smooth_star_rating/smooth_star_rating.dart';
import 'package:intl/intl.dart';
class NewNote extends StatefulWidget{
final CustomerNote note;
NewNote(this. note);
final Function(Color) onChanged;
final double height;
final double width;
NewNote({
Key key,
this.onChanged,
this.height = 25,
this.width = 150,
this.label,
}) : super(key: key);*/
@override
State<StatefulWidget> createState() {
return New_NoteState(this.note);
}
}
class New_NoteState extends State<NewNote> with SingleTickerProviderStateMixin{
New_NoteState(this.note);
CustomerNote note=new CustomerNote();
AddCustomer customer=new AddCustomer();
TextEditingController NoteController=TextEditingController();
TextEditingController custNameController = TextEditingController();
DateTime _reminderDate = DateTime.now();
DBService dbService=new DBService();
SpeedDial _speedDial(){
return SpeedDial(
animatedIcon: AnimatedIcons.add_event,
animatedIconTheme: IconThemeData(size: 24.0),
backgroundColor: Colors.yellow,
curve: Curves.easeInCirc,
children: [
SpeedDialChild(
child: Icon(Icons.location_on,color: Colors.yellow,),
label: 'Add Location',
),
SpeedDialChild(
child: Icon(Icons.keyboard_voice),
//backgroundColor: Colors.yellow,
label: 'Add voice',
//labelBackgroundColor: Colors.yellow
),
SpeedDialChild(
child: Icon(Icons.attachment_outlined,color :Colors.redAccent),
label: 'Add File',
),
SpeedDialChild(
child: Icon(Icons.image,color: Colors.lightBlue,),
label: 'Add Image',
),
],
);
}
//for DropDownMenu
Color value=Colors.red;
final List<Color> colors = [
Colors.red,
Colors.blue,
Colors.green,
Colors.yellow,
Colors.pink,
Colors.purple,
Colors.brown,
];
bool isSwitched = false;
var textValue = 'Switch is OFF';
void toggleSwitch(bool value) {
if(isSwitched == false)
{
setState(() {
isSwitched = true;
this.note.remindOn = _reminderDate.toString();
});
}
else
{
setState(() {
isSwitched = false;
});
}
}
@override
Widget build(BuildContext context) {
var height = MediaQuery.of(context).size.height;
var width = MediaQuery.of(context).size.width;
custNameController.text = customer.custName;
return WillPopScope(
onWillPop: () {
moveToLastScreen();
},
child: Scaffold(
appBar:AppBar(),
body:ListView(
children: <Widget>[
SizedBox(
height: 2.0,
),
TextField(controller: custNameController,
style: TextStyle(
fontSize: 20.0, fontWeight: FontWeight.bold),
textAlign: TextAlign.center),
Align(
alignment: Alignment.centerLeft,
child: Text("Add New",textAlign: TextAlign.left,
style: TextStyle(fontSize: 22,fontWeight: FontWeight.bold),),
),
SizedBox(
height: 2.0,
),
Divider(),
SizedBox(
height: 2.0,
),
Padding(
padding: const EdgeInsets.all(8.0),
child: TextField(
controller: NoteController,
decoration: InputDecoration(
border: OutlineInputBorder(
borderSide: const BorderSide(width: 2.0),)),
keyboardType: TextInputType.multiline,
minLines: 5,
maxLines: 5,
onChanged: (value) {
this.note.note = value;
},
),
),
TableCalendar(
selectedDayPredicate: (day) {
return isSameDay(_reminderDate, day);
},
onDaySelected: (selectedDay, focusedDay) {
setState(() {
_reminderDate = selectedDay;
});
},
focusedDay: DateTime.now(),
firstDay: DateTime.utc(2010, 10, 16),
lastDay: DateTime.utc(2030, 3, 14),),
SizedBox(
height: height*0.03,
),
Padding(
padding: const EdgeInsets.all(10.0),
child: Row(//mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
Text("Remind me",style: TextStyle(fontSize: 20),),
Padding(
padding: const EdgeInsets.only(left:80.0),
child: Container(
child: Switch(
onChanged: toggleSwitch,
value: isSwitched,
),
),
],),
),
Padding(
padding: const EdgeInsets.all(10.0),
child: Row(mainAxisAlignment: MainAxisAlignment.start,
children:<Widget>[
Text("Priority",style: TextStyle(fontSize: 20.0),),
Padding(
padding: const EdgeInsets.only(left:20.0),
child: Container(
child: SmoothStarRating(
size: height=50.0,
allowHalfRating: false,
onRated: (value) {
this.note.priority=value;
print("rating value -> $value");
},
),
),
)]),
),
Padding(
padding: const EdgeInsets.all(10.0),
child: Row(mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
Text("Color",style: TextStyle(fontSize: 20),),
Padding(
padding: const EdgeInsets.only(left:80.0),
child: Container(
child: DropdownButton<Color>(
value: value,
onChanged: (color) {
setState(() => value = color);
},
items: colors.map((e) => DropdownMenuItem(
value: e,
child: Container(
width: 60.0,
color: e,
),
),
)
.toList(),
),
),
),
],),
),
SizedBox(
height: height*0.08,
),
Padding(
padding: const EdgeInsets.all(8.0),
child: Container(
height: 55.0,
width: 200,
child: RaisedButton(
elevation: 2,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(20)),
color: Theme.of(context).primaryColorDark,
textColor: Colors.white,
child: Text('Save',textScaleFactor: 1.5,),
onPressed: (){
setState(() {
_save();
});
},
),
),
),
],
),
floatingActionButton:_speedDial(),
));
}
void moveToLastScreen() {
Navigator.pop(context, true);
}
void _save() async {
moveToLastScreen();
note.custId=customer.custId;
note.date = DateFormat.yMMMd().format(DateTime.now());
int result;
if (note.id != null) { // Case 1: Update operation
result = await dbService.updateNote(note);
} else { // Case 2: Insert Operation
result = await dbService.insertNote(note);
}
if (result != 0) { // Success
FormHelper.showAlertDialog(context,'Status', 'Note Saved Successfully');
} else { // Failure
FormHelper.showAlertDialog(context,'Status', 'Problem Saving Note');
}
}
}
db_service.dart
Future<bool> insertCustomer(AddCustomer model) async {
await DB.init();
bool isSaved = false;
if (model != null) {
int inserted = await DB.insert(AddCustomer.table, model);
isSaved = inserted == 1 ? true : false;
}
return isSaved;
}
Future<List<Map<String, dynamic>>> getCustomerMapList() async {
await DB.init();
var result = await DB.query(AddCustomer.table);
return result;
}
Future<List<AddCustomer>> getCustomerList() async {
var CustomerMapList = await getCustomerMapList();
int count = CustomerMapList.length;
List<AddCustomer> customerList = List<AddCustomer>();
for (int i = 0; i < count; i++) {
customerList.add(AddCustomer.fromMap(CustomerMapList[i]));
}
return customerList;
}
Future<int> insertNote(CustomerNote note) async {
await DB.init();
var result = await DB.insert(CustomerNote.table, note);
return result;
}
Future<List<CustomerNote>> getCustomerNotes(int customer) async {
await DB.init();
var res = await DB.rawQuery("noteDetails WHERE custId = '$customer'");
int count = res.length;
List<CustomerNote> notelist = List<CustomerNote>();
for (int i = 0; i < count; i++) {
notelist.add(CustomerNote.fromMap(res[i]));
}
return notelist;
}
database_helper.dart
import 'dart:async';
import 'package:customer/models/model.dart';
import 'package:path/path.dart' as p;
import 'package:sqflite/sqflite.dart';
abstract class DB {
static Database _db;
static int get _version => 1;
static Future<Database> init() async {
if (_db != null) {
return _db;
}
try {
var databasesPath = await getDatabasesPath();
String _path = p.join(databasesPath, 'Customer.db');
_db = await openDatabase(_path, version: _version, onCreate: onCreate);
print('db location:'+_path);
} catch (ex) {
print(ex);
}
}
static void onCreate(Database db, int version) async {
await db.execute(
'CREATE TABLE userDetails (id INTEGER PRIMARY KEY AUTOINCREMENT, '
'firstName STRING, '
'lastName STRING, mobileNum STRING, emailId STRING, address String,'
'userType STRING,password STRING)');
await db.execute(
'CREATE TABLE customerDetails (custId INTEGER PRIMARY KEY AUTOINCREMENT, '
'custName STRING, '
'mobileNum STRING, company STRING, custPhoto STRING, showOnCall bool,'
'remindOn STRING,location STRING)');
await db.execute(
'CREATE TABLE noteDetails (noteId INTEGER PRIMARY KEY AUTOINCREMENT, '
'custId STRING, '
'custName STRING, date STRING, note STRING, remindOn STRING,'
'priority STRING,status STRING,attachment STRING)');
await db.execute(
'CREATE TABLE languagesKnown(custId INTEGER REFERENCES customerDetails(custId),'
' languages STRING,PRIMARY KEY(custId))');
}
static Future<List<Map<String, dynamic>>> query(String table) async =>
_db.query(table);
static Future<int> insert(String table, Model model) async =>
await _db.insert(table, model.toMap());
static Future<int> update(String table, Model model) async => await _db
.update(table, model.toMap(), where: 'id = ?', whereArgs: [model.id]);
static Future<int> delete(String table, Model model) async =>
await _db.delete(table, where: 'id = ?', whereArgs: [model.id]);
static Future<int> deleteCustomer(String table, Model model) async =>
await _db.delete(table, where: 'custId = ?', whereArgs: [model.custId]);
static Future<Batch> batch() async => _db.batch();
static Future<List<Map<String, dynamic>>> rawQuery(String table) async =>
_db.query(table);
}
people_list.dart // 这是显示客户列表的地方，点击列表块即客户，Note_info 打开
import 'package:customer/models/addCustomer.dart';
import 'package:customer/screens/Note_info.dart';
import 'package:customer/screens/User_Settings.dart';
import 'package:customer/screens/add_person.dart';
import 'package:customer/services/db_service.dart';
import 'package:customer/utils/database_helper.dart';
import 'package:customer/utils/form_helper.dart';
import 'package:flutter/material.dart';
import 'dart:io';
import 'package:sqflite/sqflite.dart';
class People_List extends StatefulWidget{
@override
State<StatefulWidget> createState() {
return People_ListState();
}
}
class People_ListState extends State<People_List> with SingleTickerProviderStateMixin{
DBService dbService = DBService();
List<AddCustomer> customerList;
int count = 0;
static final GlobalKey<ScaffoldState> scaffoldKey = new GlobalKey<ScaffoldState>();
var _isSelectedItemIndex;
@override
void initState() {
super.initState();
_searchQuery = new TextEditingController();
}
Widget _buildTitle(BuildContext context) {
var horizontalTitleAlignment =
Platform.isIOS ? CrossAxisAlignment.center : CrossAxisAlignment.start;
return new InkWell(
onTap: () => scaffoldKey.currentState.openDrawer(),
child: new Padding(
padding: const EdgeInsets.symmetric(horizontal: 12.0),
child: new Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: horizontalTitleAlignment,
children: <Widget>[
const Text(''),
],
),
),
);
}
@override
Widget build(BuildContext context) {
var height = MediaQuery.of(context).size.height;
var width = MediaQuery.of(context).size.width;
if (customerList == null) {
customerList = List<AddCustomer>();
updateListView();
}
return Scaffold(
appBar: new AppBar(
),
body:getCustomerListView(),
floatingActionButton: FloatingActionButton(
onPressed: () {
navigateToCustomer(AddCustomer(), 'Add Person');
},
child: const Icon(Icons.add),
),
}
ListView getCustomerListView() {
TextStyle titleStyle = Theme.of(context).textTheme.subhead;
return ListView.builder(
itemCount: count,
itemBuilder: (BuildContext context, int position) {
var _imageFile=customerList[position].custPhoto;
return Card(
color: Colors.white,
elevation: 2.0,
child: ListTile(
leading: CircleAvatar(
backgroundImage: _imageFile==null?AssetImage('images/person_icon.jpg')
:FileImage(File(_imageFile.toString()))),
title: Text(this.customerList[position].custName, style: titleStyle,),
trailing: Icon(Icons.keyboard_arrow_right),
onTap: () {
navigateToDetail(this.customerList[position],'Edit ');
},
),
);
},
);
}
void navigateToDetail(AddCustomer customer, String title) async {
bool result = await Navigator.push(context, MaterialPageRoute(builder: (context) {
return Note_Info(customer, title);
}));
if (result == true) {
updateListView();
}
}
void updateListView() {
final Future<Database> dbFuture = DB.init();
dbFuture.then((database) {
Future<List<AddCustomer>> customerListFuture = dbService.getCustomerList();
customerListFuture.then((customerList) {
setState(() {
this.customerList = customerList;
this.count = customerList.length;
});
});
});
}
}
最后只好自己解决了。问题是我创建笔记并将其保存在“笔记”table cust_id 中的地方没有保存在 table 中。所以我将 CustomerModel 对象和 NoteModel 对象传递给 New_Note()。现在工作正常
new_note.dart
class NewNote extends StatefulWidget{
final NoteModel note;
final CustomerModel customer;
NewNote(this.customer,this. note);
@override
State<StatefulWidget> createState() {
//return New_NoteState(this.customer);
return New_NoteState(this.customer,this.note);
}
class New_NoteState extends State<NewNote> with SingleTickerProviderStateMixin{
New_NoteState(this.customer,this.note);
NoteModel note=new NoteModel();
CustomerModel customer=new CustomerModel();
}
void _save() async {
note.cust_id=customer.cust_id;
...
}