dart

Flutter Cloud Firestore Map<String, dynamic> error

由 Deadly 提交于 2020-12-03 04:15:25
问题 I am trying to build an app using Flutter and Firestore. When loading a Collection from Firestore using StreamBuilder to display it in a ListView, I get the following error The following assertion was thrown building StreamBuilder<QuerySnapshot>(dirty, state: I/flutter (26287): _StreamBuilderBaseState<QuerySnapshot, AsyncSnapshot<QuerySnapshot>>#d5638): I/flutter (26287): type '_InternalLinkedHashMap<dynamic, dynamic>' is not a subtype of type 'Map<String, dynamic>' I/flutter (26287): where I

FlutterBoost简单使用介绍

由 大憨熊 提交于 2020-12-02 10:31:57
简介 在使用flutter混合开发中，免不了flutter和原生native页面的相互跳转和通信，flutterboost就是闲鱼团队开发的一个可复用的插件，旨在把Flutter容器做成浏览器的感觉。填写一个页面地址，然后由容器去管理页面的绘制。在Native侧我们只需要关心如果初始化容器，然后设置容器对应的页面标志即可。 准备工作 Flutter项目 在pubspec.yaml中添加以下依赖项： flutter_boost: ^0.0.400 将init代码添加到Dart的app首页面; void main (){ runApp(App()); } class App extends StatefulWidget{ @override _MyAppState createState() => _MyAppState(); } class _MyAppState extends State<App>{ @override void initState() { // TODO: implement initState super.initState(); ///register page widget builders,the key is pageName FlutterBoost.singleton.registerPageBuilders({ 'first':

Update to Android Studio 4.1 ,flutter plugin and dart plugin not Installed

由 橙三吉。 提交于 2020-12-02 07:11:56
问题 I have got a similar question like this. But this problem occurred after updating Android Studio to version 4.1 from version 4.0. using flutter flutter doctor -v 回答1: I solve this problem like this Only for MacOS $ ln -s ~/Library/Application\ Support/Google/AndroidStudio4.1/plugins ~/Library/Application\ Support/AndroidStudio4.1 回答2: It is a flutter issue on 1.22 version, and happens after upgrading to Android Studio 4.1. It was already fixed on 1.23 version (dev channel). You can continue

Flutter - How to draw an Image on Canvas using DrawImage method

由 ぃ、小莉子 提交于 2020-12-02 07:08:32
问题 I'm trying to draw an image file into the canvas to compose my widget in Flutter. I did follow canvas documentation but a did not success. O Image docs, thay say that: To obtain an Image object, use instantiateImageCodec. I did try use instantiateImageCodec method, but i just get a Codec instance, not a Image How is the right way to get an instance of ui.Image to draw on canvas using canvas.drawImage Here is a snnipet of my code: Future<ui.Codec> _loadImage(AssetBundleImageKey key) async {

Update to Android Studio 4.1 ,flutter plugin and dart plugin not Installed

由 风流意气都作罢 提交于 2020-12-02 07:04:23
问题 I have got a similar question like this. But this problem occurred after updating Android Studio to version 4.1 from version 4.0. using flutter flutter doctor -v 回答1: I solve this problem like this Only for MacOS $ ln -s ~/Library/Application\ Support/Google/AndroidStudio4.1/plugins ~/Library/Application\ Support/AndroidStudio4.1 回答2: It is a flutter issue on 1.22 version, and happens after upgrading to Android Studio 4.1. It was already fixed on 1.23 version (dev channel). You can continue

Update to Android Studio 4.1 ,flutter plugin and dart plugin not Installed

由 不打扰是莪最后的温柔 提交于 2020-12-02 07:04:13
问题 I have got a similar question like this. But this problem occurred after updating Android Studio to version 4.1 from version 4.0. using flutter flutter doctor -v 回答1: I solve this problem like this Only for MacOS $ ln -s ~/Library/Application\ Support/Google/AndroidStudio4.1/plugins ~/Library/Application\ Support/AndroidStudio4.1 回答2: It is a flutter issue on 1.22 version, and happens after upgrading to Android Studio 4.1. It was already fixed on 1.23 version (dev channel). You can continue

How to fetch records by comparing with date in flutter cloud firestore plugin?

由 前提是你 提交于 2020-12-02 07:03:55
问题 Working on a flutter application where I'm using firebase cloud firestore for storing all my documents. My document has a startDateTime field having a format like this... I want to fetch all records whose startDateTime is greater than or equal to current date. Here is my flutter code to do this... Firestore.instance.collection("trips") .where("trip.createdByUID", isEqualTo: this.userDetails['id']) .where("trip.startDateTime", isGreaterThanOrEqualTo: new DateTime.now().toString() )

How to fetch records by comparing with date in flutter cloud firestore plugin?

由 依然范特西╮ 提交于 2020-12-02 07:01:05
问题 Working on a flutter application where I'm using firebase cloud firestore for storing all my documents. My document has a startDateTime field having a format like this... I want to fetch all records whose startDateTime is greater than or equal to current date. Here is my flutter code to do this... Firestore.instance.collection("trips") .where("trip.createdByUID", isEqualTo: this.userDetails['id']) .where("trip.startDateTime", isGreaterThanOrEqualTo: new DateTime.now().toString() )

How to fetch records by comparing with date in flutter cloud firestore plugin?

由 混江龙づ霸主 提交于 2020-12-02 07:00:29
问题 Working on a flutter application where I'm using firebase cloud firestore for storing all my documents. My document has a startDateTime field having a format like this... I want to fetch all records whose startDateTime is greater than or equal to current date. Here is my flutter code to do this... Firestore.instance.collection("trips") .where("trip.createdByUID", isEqualTo: this.userDetails['id']) .where("trip.startDateTime", isGreaterThanOrEqualTo: new DateTime.now().toString() )

How to fetch records by comparing with date in flutter cloud firestore plugin?

由 不打扰是莪最后的温柔 提交于 2020-12-02 07:00:03
问题 Working on a flutter application where I'm using firebase cloud firestore for storing all my documents. My document has a startDateTime field having a format like this... I want to fetch all records whose startDateTime is greater than or equal to current date. Here is my flutter code to do this... Firestore.instance.collection("trips") .where("trip.createdByUID", isEqualTo: this.userDetails['id']) .where("trip.startDateTime", isGreaterThanOrEqualTo: new DateTime.now().toString() )
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