Related
when I am debug this its shown a error on search bar when I try to text on emulator here is the code please resolve this thanks
LateInitializationError: Field 'name' has not been initialized.
import 'dart:async';
import 'dart:convert';
import 'package:http/http.dart' as http;
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
const MyApp({super.key});
#override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
home: HomePage(),
);
}
}
class HomePage extends StatefulWidget {
#override
State<HomePage> createState() => _HomePageState();
}
class _HomePageState extends State<HomePage> {
String url = "https://owlbot.info/api/v4/dictionary/";
String token = "7ba05536bd11ff8e22800cbda80951376c59ed84";
TextEditingController textEditingController = TextEditingController();
late StreamController _streamController;
late Stream _stream;
late Timer _debounce;
searchText() async {
if (textEditingController.text == null ||
textEditingController.text.isEmpty) {
_streamController.add(null);
return;
}
_streamController.add("waiting");
Uri uri = Uri.parse(url+textEditingController.text.trim());
http.Response response = await http.get (uri, headers: {"Authorization": "Token " + token});
_streamController.add(json.decode(response.body));
}
#override
void initState() {
super.initState();
_streamController = StreamController();
_stream=_streamController.stream;
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Colors.green,
title: Text(
"Dictionery",
style: TextStyle(color: Colors.white),
),
centerTitle: true,
bottom: PreferredSize(
preferredSize: Size.fromHeight(45),
child: Row(
children: [
Expanded(
child: Container(
margin: const EdgeInsets.only(left: 12, bottom: 11),
decoration:
BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.circular(24),
),
child: TextFormField(
onChanged: (String text) {
if (_debounce.isActive) _debounce.cancel();
_debounce = Timer(const Duration(milliseconds: 1000), () {
searchText();
},
);
},
controller: textEditingController,
decoration: InputDecoration(
hintText: "Search for Word",
contentPadding: const EdgeInsets.only(left: 24),
border: InputBorder.none,
),
),
),
),
IconButton(
icon:Icon(
Icons.search,
color: Colors.white,
),
onPressed: (){
searchText();
},
),
],
),
),
),
body: Container(
margin: EdgeInsets.all(8.0),
child: StreamBuilder(
builder:(BuildContext context, AsyncSnapshot snapshot){
if(snapshot.data== null)
{
return Center(
child: Text('Enter A Search Word'),
);
}
if(snapshot.data == "waiting"){
return Center(
child: CircularProgressIndicator(),
);
}
return ListView.builder(
itemCount: snapshot.data["defination"].length,
itemBuilder: (BuildContext context , int index)
{
return ListBody(
children: [
Container(
color: Colors.grey[300],
child: ListTile(
leading:snapshot.data["definations"][index]["image_url"] == null
? null:
CircleAvatar(
backgroundImage: NetworkImage(snapshot.data["definations"][index]["image_url"]),
),
title: Text(textEditingController.text.trim()
+"(" + snapshot.data["definations"][index]["type"]+")"),
),
),
Padding(
padding: const EdgeInsets.all(8.0),
child: Text(
snapshot.data["defination"][index]["defination"]),
)
],
);
},
);
},
stream: _stream,
),
),
);
}
}
when i debug this and touch on screen for text its give me error late initialization
Current issue is _debounce has not been initialized. Instead of late, make it nullable Timer? _debounce;.
And changes will be
child: TextFormField(
onChanged: (String text) async {
if (_debounce != null && _debounce!.isActive) {
_debounce!.cancel();
_debounce = Timer(
const Duration(milliseconds: 1000),
() async {
await searchText();
},
);
}
},
Full snippet
import 'dart:async';
import 'dart:convert';
import 'package:http/http.dart' as http;
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
const MyApp({super.key});
#override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
home: HomePage(),
);
}
}
class HomePage extends StatefulWidget {
#override
State<HomePage> createState() => _HomePageState();
}
class _HomePageState extends State<HomePage> {
String url = "https://owlbot.info/api/v4/dictionary/";
String token = "7ba05536bd11ff8e22800cbda80951376c59ed84";
TextEditingController textEditingController = TextEditingController();
late StreamController _streamController;
late Stream _stream;
Timer? _debounce;
Future<void> searchText() async {
if (textEditingController.text.isEmpty) {
_streamController.add(null);
return;
}
_streamController.add("waiting");
Uri uri = Uri.parse(url + textEditingController.text.trim());
http.Response response =
await http.get(uri, headers: {"Authorization": "Token " + token});
_streamController.add(json.decode(response.body));
}
#override
void initState() {
super.initState();
_streamController = StreamController();
_stream = _streamController.stream;
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Colors.green,
title: Text(
"Dictionery",
style: TextStyle(color: Colors.white),
),
centerTitle: true,
bottom: PreferredSize(
preferredSize: Size.fromHeight(45),
child: Row(
children: [
Expanded(
child: Container(
margin: const EdgeInsets.only(left: 12, bottom: 11),
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.circular(24),
),
child: TextFormField(
onChanged: (String text) async {
if (_debounce != null && _debounce!.isActive) {
_debounce!.cancel();
_debounce = Timer(
const Duration(milliseconds: 1000),
() async {
await searchText();
},
);
}
},
controller: textEditingController,
decoration: InputDecoration(
hintText: "Search for Word",
contentPadding: const EdgeInsets.only(left: 24),
border: InputBorder.none,
),
),
),
),
IconButton(
icon: Icon(
Icons.search,
color: Colors.white,
),
onPressed: () {
searchText();
},
),
],
),
),
),
body: Container(
margin: EdgeInsets.all(8.0),
child: StreamBuilder(
builder: (BuildContext context, AsyncSnapshot snapshot) {
if (snapshot.data == null) {
return Center(
child: Text('Enter A Search Word'),
);
}
if (snapshot.data == "waiting") {
return Center(
child: CircularProgressIndicator(),
);
}
return ListView.builder(
itemCount: snapshot.data["defination"].length,
itemBuilder: (BuildContext context, int index) {
return ListBody(
children: [
Container(
color: Colors.grey[300],
child: ListTile(
leading: snapshot.data["definations"][index]
["image_url"] ==
null
? null
: CircleAvatar(
backgroundImage: NetworkImage(snapshot
.data["definations"][index]["image_url"]),
),
title: Text(textEditingController.text.trim() +
"(" +
snapshot.data["definations"][index]["type"] +
")"),
),
),
Padding(
padding: const EdgeInsets.all(8.0),
child: Text(
snapshot.data["defination"][index]["defination"]),
)
],
);
},
);
},
stream: _stream,
),
),
);
}
}
I have a Stateful widget that i pass a list to (for example 2 items).
After I delete an item, the widget should rebuild itself.
Unfortunately, the deleted item is still displayed and the other one is not.
When I re-enter the widget, the correct item is loaded.
There is a similar problem List not updating on deleting item
but maybe someone can explain me what i did wrong and why provider is helping me here instead of setState?
My code is:
import 'package:firebase_database/firebase_database.dart';
import 'package:flutter/material.dart';
import 'package:trip_planner/util/dialog_box.dart';
import 'package:trip_planner/util/previewUrl.dart';
class BookingPage extends StatefulWidget {
final List toDoList;
BookingPage({
super.key,
required this.toDoList,
});
#override
State<BookingPage> createState() => _BookingPageState();
}
class _BookingPageState extends State<BookingPage> {
//text controller
final _controller = TextEditingController();
final _database = FirebaseDatabase.instance.ref();
//Liste is an example what i have in my list
List toDoList2 = [
["https://www.booking.com/Share-Rnv2Kf", true],
["https://www.booking.com/Share-3hKQ0r", true],
];
void initState(){
super.initState();
}
void deleteTask(int index){
setState(() {
widget.toDoList.removeAt(index);
});
//DatabaseReference _testRef = _database.child("Hotel:");
//_testRef.set(widget.toDoList.toString());
}
//save new Item
void saveNewItem(){
setState(() {
widget.toDoList.add([_controller.text, false]);
//DatabaseReference _testRef = _database.child("Hotel:");
//_testRef.set(widget.toDoList.toString());
_controller.clear();
});
Navigator.of(context).pop();
}
void createNewItem(){
showDialog(
context: context,
builder: (context){
return DialogBox(
controller: _controller,
onSave: saveNewItem,
onCancel: () => Navigator.of(context).pop(),
);
},
);
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Booking Seiten'),
elevation: 0,
),
floatingActionButton: FloatingActionButton(
onPressed: createNewItem,
child: Icon(Icons.add),
),
body: ListView.builder(
itemCount: widget.toDoList.length,
itemBuilder: (context, index){
return PreviewUrl(
url2: widget.toDoList[index][0],
deleteFunction: (context) => setState(() => deleteTask(index)),
);
},
),
);
}
}
i thought setState does the same thing as when i re-enter the widget, but it doesn't.
import 'package:any_link_preview/any_link_preview.dart';
import 'package:flutter/material.dart';
import 'package:flutter_slidable/flutter_slidable.dart';
import 'package:url_launcher/url_launcher.dart';
class PreviewUrl extends StatelessWidget {
final String url2;
//Function(bool?)? onChanged;
Function(BuildContext)? deleteFunction;
PreviewUrl({
super.key,
required this.url2,
required this.deleteFunction,
//required this.onChanged,
});
Future openBrowserURL({
required String url,
bool inApp = false,
}) async {
if(await canLaunch(url)){
await launch(
url,
forceSafariVC: inApp, //iOS
forceWebView: inApp, //Android
enableJavaScript: true, //Android
);
}
}
#override
Widget build(BuildContext context) {
return Padding(
padding: const EdgeInsets.all(1.0),
child: Slidable(
endActionPane: ActionPane(
motion: StretchMotion(),
children: [
SlidableAction(
onPressed: deleteFunction,
icon: Icons.delete,
backgroundColor: Colors.red.shade300,
borderRadius: BorderRadius.circular(12),
)
],
),
child: Container(
child: AnyLinkPreview.builder(
link: url2,
itemBuilder: (context, metadata, imageProvider) => Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
if (imageProvider != null)
GestureDetector(
onTap: () async {
final url = url2;
openBrowserURL(url: url, inApp: true);
},
child: Container(
constraints: BoxConstraints(
maxHeight: MediaQuery.of(context).size.width *0.25,
),
decoration: BoxDecoration(
borderRadius: BorderRadius.only(
topLeft: Radius.circular(12),
topRight: Radius.circular(12)),
image: DecorationImage(
image: imageProvider,
fit: BoxFit.cover,
),
),
),
),
Container(
width: double.infinity,
color: Theme.of(context).primaryColor.withOpacity(0.6),
padding: const EdgeInsets.symmetric(
vertical: 10, horizontal: 15),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
if (metadata.title != null)
Text(
metadata.title!,
maxLines: 1,
style:
const TextStyle(fontWeight: FontWeight.w500),
),
const SizedBox(height: 5),
if (metadata.desc != null)
Text(
metadata.desc!,
maxLines: 1,
style: Theme.of(context).textTheme.bodySmall,
),
Text(
metadata.url ?? url2,
maxLines: 1,
style: Theme.of(context).textTheme.bodySmall,
),
],
),
),
],
),
),
),
),
);
}
}
If you run the simplified version of your code in DartPad - it will work:
import 'package:flutter/material.dart';
const Color darkBlue = Color.fromARGB(255, 18, 32, 47);
List toDoList = [
["Button 1", true],
["Button 2", true],
];
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
theme: ThemeData.dark().copyWith(
scaffoldBackgroundColor: darkBlue,
),
debugShowCheckedModeBanner: false,
home: Scaffold(
body: Center(
child: BookingPage(toDoList: toDoList),
),
),
);
}
}
class BookingPage extends StatefulWidget {
final List toDoList;
const BookingPage({
super.key,
required this.toDoList,
});
#override
State<BookingPage> createState() => _BookingPageState();
}
class _BookingPageState extends State<BookingPage> {
//Liste is an example what i have in my list
List toDoList2 = [
["Button 1", true],
["Button 2", true],
];
#override
void initState() {
super.initState();
}
void deleteTask(int index) {
setState(() {
widget.toDoList.removeAt(index);
});
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('Booking Seiten'),
elevation: 0,
),
body: ListView.builder(
itemCount: widget.toDoList.length,
itemBuilder: (context, index) {
return ElevatedButton(
style: ElevatedButton.styleFrom(
backgroundColor: Colors.lightBlue,
padding: const EdgeInsets.all(12),
textStyle: const TextStyle(fontSize: 22),
),
child: Text(widget.toDoList[index][0]!),
onPressed: () => setState(() => deleteTask(index)),
);
},
),
);
}
}
Which tells me that the problem is your PreviewUrl. My guess is - it is a statful widget, and when the tree rebuilds - it will link the old State object to the first item.
Using Keys might help, something like:
return PreviewUrl(
key: ObjectKey(widget.toDoList[index]),
url2: widget.toDoList[index][0],
deleteFunction: (context) => setState(() => deleteTask(index)),
);
I am getting The following error while Run my app default page (Homepage) .
════════ Exception caught by widgets library ═══════════
The following ArgumentError was thrown building MyHomePage(dirty, dependencies: [MediaQuery, _EffectiveTickerMode], state: _MyHomePageState#7da5f(ticker inactive)):
Invalid argument(s)
**The Tracker showing the following reasons:**
The relevant error-causing widget was:
MyHomePage file:///F:/Orangebd/app/GoogleDriveClone-Flutter/lib/Screen/Home.dart:37:15
When the exception was thrown, this was the stack:
#0 _StringBase.+ (dart:core-patch/string_patch.dart:272:57)
#1 _MyHomePageState.build (package:googledriveclone_flutter/Screen/Home.dart:133:45)
#2 StatefulElement.build (package:flutter/src/widgets/framework.dart:4716:27)
#3 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4599:15)
#4 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4772:11)
...
══════════════════════════════════════════
During that error, the screen appears something like that
Here is my Home page code
import 'package:fab_circular_menu/fab_circular_menu.dart';
//import 'package:file_picker/file_picker.dart';
import 'package:floating_action_bubble/floating_action_bubble.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:get/get.dart';
import 'package:googledriveclone_flutter/Screen/Files.dart';
import 'package:googledriveclone_flutter/Screen/HomeScreen.dart';
import 'package:googledriveclone_flutter/Screen/LoginPage.dart';
import 'package:googledriveclone_flutter/Screen/Profile.dart';
import 'package:googledriveclone_flutter/Widget/constants.dart';
import 'package:prompt_dialog/prompt_dialog.dart';
import 'package:sk_alert_dialog/sk_alert_dialog.dart';
import 'package:storage_capacity/storage_capacity.dart';
import 'IssudFile.dart';
void main() {
runApp(HomePage());
}
class HomePage extends StatelessWidget {
// This widget is the root of your application.
#override
Widget build(BuildContext context) {
try {
return MaterialApp(
debugShowCheckedModeBanner: false,
title: 'Digilocker',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(title: 'Digilocker'),
);
}
catch(e){
print('Loading expception of page'+e.toString());
}
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> with SingleTickerProviderStateMixin {
Widget _widgetBody = HomeScreen();
int _currrentIndex = 0;
Animation<double> _animation;
AnimationController _animationController;
TextEditingController _foldername = TextEditingController();
String _fileName;
var scaffoldKey = GlobalKey<ScaffoldState>();
bool isFolder;
double _diskSpace = 0;
var _freespace ;
var _freespacemb;
var _occupiedSpace ;
var _totalSpace;
#override
void initState() {
// TODO: implement initState
// _controller.addListener(() => _extension = _controller.text);
_getStorgeInfo();
_animationController = AnimationController(
vsync: this,
duration: Duration(milliseconds: 300),
);
final curvedAnimation = CurvedAnimation(curve: Curves.easeInOut, parent: _animationController);
_animation = Tween<double>(begin: 0, end: 1).animate(curvedAnimation);
// initDiskSpace();
super.initState();
}
#override
void dispose() {
_animationController.dispose();
super.dispose();
}
void _onItemTapped(int index) async{
setState(() {
if(index == 0){
_currrentIndex = index;
_widgetBody = HomeScreen();
}
else if(index == 1){
_currrentIndex = index;
_widgetBody = MyIssuedDocScreen();
}
else if(index == 2){
_currrentIndex = index;
_widgetBody = Center(child: Text('Shared documents'),);
}
else if(index == 3){
_currrentIndex = index;
_widgetBody = MyDriveScreen();
}
});
}
#override
Widget build(BuildContext context) {
return Scaffold(
key: scaffoldKey,
endDrawerEnableOpenDragGesture: false, // This way it will not open
// endDrawer: Drawer(),
drawer: new Drawer(
elevation: 10,
child: new ListView(
padding: EdgeInsets.all(0),
children: <Widget>[
DrawerHeader(
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceAround,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Image.asset('assets/digi_locker.png', width: MediaQuery.of(context).size.width*0.30,),
SizedBox(height: 10,),
Text('Available space: '+_freespace+'\t (MB)'),
]
),
decoration: BoxDecoration(
color: kPrimaryLightColor,
),
),
ListTile(
leading: Icon(Icons.person),
title: Text('My profile'),
onTap: () {
// Get.back();
Get.to(profilePage());
},
),
Divider(),
ListTile(
leading: Icon(Icons.create_new_folder),
title: Text('Create folder'),
onTap: () {
// Get.back();
_showMyDialog();
},
),
ListTile(
leading: Icon(Icons.cloud_upload_rounded),
title: Text('File upload'),
onTap: () {
// Get.back();
},
),
ListTile(
leading: Icon(Icons.six_ft_apart_outlined),
title: Text('Issued documents'),
onTap: () {
// Get.back();
},
),
Divider(),
ListTile(
leading: Icon(Icons.translate_rounded),
title: Text('Change lagnuage'),
onTap: () {
// Get.back();
//Get.offAll(LoginPage());
//Do some stuff here
//Closing programmatically - very less practical use
scaffoldKey.currentState.openEndDrawer();
},
),
ListTile(
leading: Icon(Icons.logout),
title: Text('Logout'),
onTap: () {
// Get.back();
Get.offAll(LoginPage());
//Do some stuff here
//Closing programmatically - very less practical use
scaffoldKey.currentState.openEndDrawer();
},
)
],
),
),
appBar: AppBar(
elevation: 0,
backgroundColor: Colors.white,
brightness: Theme.of(context).brightness,
title: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
crossAxisAlignment: CrossAxisAlignment.center,
children:
[
Expanded(
child: Container(
decoration: BoxDecoration(
borderRadius: BorderRadius.all(Radius.circular(35)),
color: Colors.grey.shade50,
),
child: TextFormField(
decoration: InputDecoration(
hintText: "Search in locker",
border: InputBorder.none,
icon: Container(
margin: EdgeInsets.only(left: 10),
child: Icon(Icons.search, color: kPrimaryColor,)
),
),
),
),
),
]
),
iconTheme: IconThemeData(color: kPrimaryColor),
actions: <Widget>[
IconButton(
onPressed: (){
print("Sync started");
showSnackMessage(context,"Sync Started please wait...", scaffoldKey,'');
},
icon: Icon(
Icons.sync,
color:kPrimaryColor,
),
),
IconButton(
icon: Container(
height: 50,
width: 50,
margin: EdgeInsets.all(5),
child: CircleAvatar(
radius: 14.0,
backgroundColor: Colors.white,
child: CircleAvatar(
radius: 14.0,
backgroundColor: Colors.grey[200],
backgroundImage: NetworkImage("https://qph.fs.quoracdn.net/main-qimg-11ef692748351829b4629683eff21100.webp"),
),
),
),
onPressed: () {
// do something
},
)
],
),
body: SafeArea(
child: Container(
padding: EdgeInsets.all(15.0),
child: _widgetBody
),
),
floatingActionButtonLocation: FloatingActionButtonLocation.endFloat,
//Init Floating Action Bubble
floatingActionButton: FloatingActionBubble(
// Menu items
items: <Bubble>[
// Floating action menu item
Bubble(
title:"Upload",
iconColor :kPrimaryColor,
bubbleColor : Colors.white.withOpacity(0.9),
titleStyle:TextStyle(fontSize: 16 , color: kPrimaryColor),
icon:Icons.cloud_upload,
onPress: () {
// OpenFilePicker();
_animationController.reverse();
_openFileType(context);
},
),
// Floating action menu item
Bubble(
title:"Folder",
icon:Icons.create_new_folder,
iconColor :kPrimaryColor,
bubbleColor : Colors.white.withOpacity(0.9),
titleStyle:TextStyle(fontSize: 16 , color: kPrimaryColor),
onPress: () {
_animationController.reverse();
print('creating folder');
_showMyDialog();
},
),
//Floating action menu item
],
// animation controller
animation: _animation,
// On pressed change animation state
onPress: _animationController.isCompleted
? _animationController.reverse
: _animationController.forward,
// Floating Action button Icon color
iconColor: kPrimaryColor,
// Flaoting Action button Icon
icon: AnimatedIcons.menu_close,
),
bottomNavigationBar: BottomNavigationBar(
currentIndex: _currrentIndex,
type: BottomNavigationBarType.fixed,
showSelectedLabels: true,
showUnselectedLabels: true,
selectedItemColor: kPrimaryColor,
onTap: _onItemTapped,
items: [
BottomNavigationBarItem(
icon: _currrentIndex==0?Icon(Icons.home,size: 25,):Icon(Icons.home_outlined,size: 25),
title: Text("Home")
),
BottomNavigationBarItem(
icon: _currrentIndex==1?Icon(Icons.file_download_done,size: 25,):Icon(Icons.file_download_done_outlined,size: 25),
title: Text("Issued")
),
BottomNavigationBarItem(
icon: _currrentIndex==2?Icon(Icons.supervised_user_circle,size: 25,):Icon(Icons.supervised_user_circle,size: 25),
title: Text("Shared")
),
BottomNavigationBarItem(
icon: _currrentIndex==3?Icon(Icons.folder,size: 25,):Icon(Icons.folder_open,size: 25),
title: Text("My locker")
),
],
), );
}
Future<void> _showMyDialog() async {
return showDialog<void>(
context: context,
barrierDismissible: false, // user must tap button!
builder: (BuildContext context) {
return AlertDialog(
backgroundColor: Colors.white,
elevation: 13,
title: Text('Create folder'),
content: TextField(
onChanged: (value) { },
controller: _foldername,
decoration: InputDecoration(hintText: "your folder/directory name",
suffixIcon: IconButton(
onPressed: () => _foldername.clear(),
icon: Icon(Icons.clear),
),
),
),
actions: <Widget>[
TextButton(
child: Text('Cancel', style: TextStyle(color: Colors.red),),
onPressed: () {
//Navigator.pop(_);
Navigator.of(context).pop();
// _animationController.reverse();
},
),
TextButton(
child: Text('Create', style: TextStyle(color: kPrimaryColor),),
onPressed: () {
createFolder(context, scaffoldKey, _foldername.text.toString()) ;
Get.back();
//Navigator.of(context).pop();
// _animationController.reverse();
},
),
],
);
},
);
}
void _openFileType(BuildContext context) {
SKAlertDialog.show(
context: context,
type: SKAlertType.radiobutton,
radioButtonAry: {'Certificate': 1, 'Signature': 2, 'NID': 3, 'Passport': 4, 'Driving licence': 5},
title: 'Choose File category',
onCancelBtnTap: (value) {
print('Cancel Button Tapped');
Navigator.of(context).pop(false);
},
onRadioButtonSelection: (value) {
print('onRadioButtonSelection $value');
},
);
}
/* Future<void> initDiskSpace() async {
double diskSpace = 0;
diskSpace = await DiskSpace.getFreeDiskSpace;
if (!mounted) return;
setState(() {
_diskSpace = diskSpace;
});
}
*/
Future<void> _getStorgeInfo() async{
_freespace = await StorageCapacity.getFreeSpace;
//_freespacemb = await StorageCapacity.toMegaBytes(double.parse(_freespace.toString()));
_occupiedSpace = await StorageCapacity.getOccupiedSpace;
_totalSpace = await StorageCapacity.getTotalSpace;
}
}
NOTE: if I Hot Reload this page, it's working okay again
Please help.
the problem is, you are getting your data in the initState method, but your widget's build is being completed before initializing the data to _freespace, and that's why the error is appearing.
as a solution, I suggest removing _getStorgeInfo() call from initState, and implementing the following structure:
#override
Widget build(BuildContext context) {
return Scaffold(
key: scaffoldKey,
endDrawerEnableOpenDragGesture: false, // This way it will not open
// endDrawer: Drawer(),
drawer: new Drawer(
...
),
appBar: AppBar(
...
),
body: SafeArea(
child: Container(
padding: EdgeInsets.all(15.0),
child: FutureBuilder(
future: _getStorgeInfo(),
builder: (context, snapshot) {
if(snapshot.connectionState!=ConnectionState.Done) return CircularProgressIndicator();
return _widgetBody;
},
),
),
));
}
I'm developing an application with flutter. But I cannot fix the buttons in the project. On my chat page, the button goes up. I'm new to the Flutter language, can you help me?
Hello, I'm developing an application with flutter. But I cannot fix the buttons in the project. On my chat page, the button goes up. I'm new to the Flutter language, can you help me?
Screenshot:
My Button Code :
class HomePage extends StatefulWidget {
#override
_HomeState createState() => _HomeState();
}
class _HomeState extends State<HomePage> {
final _scrollController = ScrollController();
List<TabItem> tabItems = List.of([
new TabItem(Icons.home, "Anasayfa", Colors.blue),
new TabItem(Icons.message, "Sohbet Odası", Colors.orange),
new TabItem(Icons.person, "Profil", Colors.red),
]);
int seciliPozisyon = 0;
CircularBottomNavigationController _navigationController;
#override
void initState() {
super.initState();
_navigationController =
new CircularBottomNavigationController(seciliPozisyon);
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Colors.black,
centerTitle: true,
title: Text("Crypto App"),
),
body: Stack(
children: <Widget>[
Padding(
child: bodyContainer(),
padding: EdgeInsets.only(bottom: 60),
),
Align(alignment: Alignment.bottomCenter, child: bottomNav())
],
),
);
}
Widget bodyContainer() {
String activeUserId =
Provider.of<AuthorizationService>(context, listen: false).activeUserId;
Color selectedColor = tabItems[seciliPozisyon].color;
switch (seciliPozisyon) {
case 0:
return HomeScreen();
break;
case 1:
return FriendlyChatApp();
break;
case 2:
return Profile(
profileId: activeUserId,
);
break;
}
}
Widget bottomNav() {
return CircularBottomNavigation(
tabItems,
controller: _navigationController,
barHeight: 60,
barBackgroundColor: Colors.white,
animationDuration: Duration(milliseconds: 300),
selectedCallback: (int selectedPos) {
setState(() {
seciliPozisyon = selectedPos;
});
},
);
}
}
ChatApp Code :
void main() {
runApp(
FriendlyChatApp(),
);
}
final ThemeData kIOSTheme = ThemeData(
primarySwatch: Colors.blue,
primaryColor: Colors.grey[100],
primaryColorBrightness: Brightness.light,
);
final ThemeData kDefaultTheme = ThemeData(
primarySwatch: Colors.orange,
accentColor: Colors.orangeAccent,
);
String _name = '';
class FriendlyChatApp extends StatelessWidget {
const FriendlyChatApp({
Key key,
}) : super(key: key);
#override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
home: ChatScreen(),
);
}
}
class ChatMessage extends StatelessWidget {
ChatMessage({this.text, this.animationController});
final String text;
final AnimationController animationController;
#override
Widget build(BuildContext context) {
return SizeTransition(
sizeFactor:
CurvedAnimation(parent: animationController, curve: Curves.easeOut),
axisAlignment: 0.0,
child: Container(
margin: EdgeInsets.symmetric(vertical: 10.0),
child: Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Container(
margin: const EdgeInsets.only(right: 16.0),
child: CircleAvatar(child: Text(_name[0])),
),
Expanded(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(_name, style: Theme.of(context).textTheme.headline4),
Container(
margin: EdgeInsets.only(top: 5.0),
child: Text(text),
),
],
),
),
],
),
),
);
}
}
class ChatScreen extends StatefulWidget {
#override
_ChatScreenState createState() => _ChatScreenState();
}
class _ChatScreenState extends State<ChatScreen> with TickerProviderStateMixin {
final List<ChatMessage> _messages = [];
final _textController = TextEditingController();
final FocusNode _focusNode = FocusNode();
bool _isComposing = false;
#override
Widget build(BuildContext context) {
return Scaffold(
body: Container(
decoration: Theme.of(context).platform == TargetPlatform.iOS //new
? BoxDecoration(
border: Border(
top: BorderSide(color: Colors.grey[200]),
),
)
: null,
child: Column(
children: [
Flexible(
child: ListView.builder(
padding: EdgeInsets.all(8.0),
reverse: true,
itemBuilder: (_, int index) => _messages[index],
itemCount: _messages.length,
),
),
Divider(height: 1.0),
Container(
decoration: BoxDecoration(color: Theme.of(context).cardColor),
child: _buildTextComposer(),
),
],
),
),
);
}
Widget _buildTextComposer() {
return IconTheme(
data: IconThemeData(color: Theme.of(context).accentColor),
child: Container(
margin: EdgeInsets.symmetric(horizontal: 8.0),
child: Row(
children: [
Flexible(
child: TextField(
controller: _textController,
onChanged: (String text) {
setState(() {
_isComposing = text.isNotEmpty;
});
},
onSubmitted: _isComposing ? _handleSubmitted : null,
decoration: InputDecoration.collapsed(
hintText: 'Mesajınızı Buraya Yazınız:'),
focusNode: _focusNode,
),
),
Container(
margin: EdgeInsets.symmetric(horizontal: 4.0),
child: Theme.of(context).platform == TargetPlatform.iOS
? CupertinoButton(
onPressed: _isComposing
? () => _handleSubmitted(_textController.text)
: null,
child: Text('Gönder'),
)
: IconButton(
icon: const Icon(Icons.send),
onPressed: _isComposing
? () => _handleSubmitted(_textController.text)
: null,
))
],
),
),
);
}
void _handleSubmitted(String text) {
_textController.clear();
setState(() {
_isComposing = false;
});
var message = ChatMessage(
text: text,
animationController: AnimationController(
duration: const Duration(milliseconds: 700),
vsync: this,
),
);
setState(() {
_messages.insert(0, message);
});
_focusNode.requestFocus();
message.animationController.forward();
}
#override
void dispose() {
for (var message in _messages) {
message.animationController.dispose();
}
super.dispose();
}
}
You need to add :
resizeToAvoidBottomInset: false,
Here as shown:
Scaffold(
//here
resizeToAvoidBottomInset: false,
appBar: AppBar(
backgroundColor: Colors.black,
centerTitle: true,
title: Text("Crypto App"),
),
body: Stack(
children: <Widget>[
Padding(
child: bodyContainer(),
padding: EdgeInsets.only(bottom: 60),
),
Align(alignment: Alignment.bottomCenter, child: bottomNav())
],
),
);
}
Here using this whenever user will type something setting value to false will make keyboard overlap the bottom navigation bar.
Hope this is what you wanted to achieve.
I'm using the Chewie Video player in my Flutter app. How to check when playback has completed, so that I can close the screen and dispose?
You can copy paste run full code below
You can check position and duration
full code is official example set loop to false and add the following code snippet
code snippet
_videoPlayerController1.addListener(() {
if (_videoPlayerController1.value.position ==
_videoPlayerController1.value.duration) {
print('video Ended');
}
});
Output
I/flutter ( 4881): video Ended
full code
import 'package:chewie/chewie.dart';
import 'package:chewie/src/chewie_player.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:video_player/video_player.dart';
void main() {
runApp(
ChewieDemo(),
);
}
class ChewieDemo extends StatefulWidget {
ChewieDemo({this.title = 'Chewie Demo'});
final String title;
#override
State<StatefulWidget> createState() {
return _ChewieDemoState();
}
}
class _ChewieDemoState extends State<ChewieDemo> {
TargetPlatform _platform;
VideoPlayerController _videoPlayerController1;
VideoPlayerController _videoPlayerController2;
ChewieController _chewieController;
#override
void initState() {
super.initState();
_videoPlayerController1 = VideoPlayerController.network(
'https://flutter.github.io/assets-for-api-docs/assets/videos/butterfly.mp4');
_videoPlayerController2 = VideoPlayerController.network(
'https://www.sample-videos.com/video123/mp4/480/asdasdas.mp4');
_chewieController = ChewieController(
videoPlayerController: _videoPlayerController1,
aspectRatio: 3 / 2,
autoPlay: true,
looping: false,
// Try playing around with some of these other options:
// showControls: false,
// materialProgressColors: ChewieProgressColors(
// playedColor: Colors.red,
// handleColor: Colors.blue,
// backgroundColor: Colors.grey,
// bufferedColor: Colors.lightGreen,
// ),
// placeholder: Container(
// color: Colors.grey,
// ),
// autoInitialize: true,
);
_videoPlayerController1.addListener(() {
if (_videoPlayerController1.value.position ==
_videoPlayerController1.value.duration) {
print('video Ended');
}
});
}
#override
void dispose() {
_videoPlayerController1.dispose();
_videoPlayerController2.dispose();
_chewieController.dispose();
super.dispose();
}
#override
Widget build(BuildContext context) {
return MaterialApp(
title: widget.title,
theme: ThemeData.light().copyWith(
platform: _platform ?? Theme.of(context).platform,
),
home: Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Column(
children: <Widget>[
Expanded(
child: Center(
child: Chewie(
controller: _chewieController,
),
),
),
FlatButton(
onPressed: () {
_chewieController.enterFullScreen();
},
child: Text('Fullscreen'),
),
Row(
children: <Widget>[
Expanded(
child: FlatButton(
onPressed: () {
setState(() {
_chewieController.dispose();
_videoPlayerController2.pause();
_videoPlayerController2.seekTo(Duration(seconds: 0));
_chewieController = ChewieController(
videoPlayerController: _videoPlayerController1,
aspectRatio: 3 / 2,
autoPlay: true,
looping: true,
);
});
},
child: Padding(
child: Text("Video 1"),
padding: EdgeInsets.symmetric(vertical: 16.0),
),
),
),
Expanded(
child: FlatButton(
onPressed: () {
setState(() {
_chewieController.dispose();
_videoPlayerController1.pause();
_videoPlayerController1.seekTo(Duration(seconds: 0));
_chewieController = ChewieController(
videoPlayerController: _videoPlayerController2,
aspectRatio: 3 / 2,
autoPlay: true,
looping: true,
);
});
},
child: Padding(
padding: EdgeInsets.symmetric(vertical: 16.0),
child: Text("Error Video"),
),
),
)
],
),
Row(
children: <Widget>[
Expanded(
child: FlatButton(
onPressed: () {
setState(() {
_platform = TargetPlatform.android;
});
},
child: Padding(
child: Text("Android controls"),
padding: EdgeInsets.symmetric(vertical: 16.0),
),
),
),
Expanded(
child: FlatButton(
onPressed: () {
setState(() {
_platform = TargetPlatform.iOS;
});
},
child: Padding(
padding: EdgeInsets.symmetric(vertical: 16.0),
child: Text("iOS controls"),
),
),
)
],
)
],
),
),
);
}
}