Flutter

问题 I just made a Flutter app following the instructions of this page, and I googled how to change the name of the application, and found this answer. But I can't change the name of the application from the manifest file. Initially android:name is io.flutter.app.FlutterApplication . I changed that to Startup Namer , and it gave the error error: attribute 'android:name' in <application> tag must be a valid Java class name. How to reslove this error and change the name? 回答1: The displayed name of

问题 I just made a Flutter app following the instructions of this page, and I googled how to change the name of the application, and found this answer. But I can't change the name of the application from the manifest file. Initially android:name is io.flutter.app.FlutterApplication . I changed that to Startup Namer , and it gave the error error: attribute 'android:name' in <application> tag must be a valid Java class name. How to reslove this error and change the name? 回答1: The displayed name of

问题 I just made a Flutter app following the instructions of this page, and I googled how to change the name of the application, and found this answer. But I can't change the name of the application from the manifest file. Initially android:name is io.flutter.app.FlutterApplication . I changed that to Startup Namer , and it gave the error error: attribute 'android:name' in <application> tag must be a valid Java class name. How to reslove this error and change the name? 回答1: The displayed name of

问题 I've been building layout with both horizontal and vertical scrolling. Vertical scrollable Column is for main content and is populated by different views, including horizontal ListView which shows promo banners. I wanted to show scrollbar for vertical scrolling, but not for horizontal. I've wrapped the SingleChildScrollView which makes Column scrollable in ScrollBar , but the bar appeared on both vertical on horizontal scrolls. Is there any fine-tuning for these kinds of things? Sample to

问题 Using Flutter 1.20.2. My Flutter app uses Firestore as it's backend database. For the current version I am using and throughout the development of this mobile app I have noticed that if my app is in the background for a period of time (could be a few mins) then when I bring the app back into the foreground the queries are very slow to return data. This does not happen on iOS. It only happens on Android. I use CircularProgressIndicators when my app is busy retrieving data from Firestore. I am

问题 Using Flutter 1.20.2. My Flutter app uses Firestore as it's backend database. For the current version I am using and throughout the development of this mobile app I have noticed that if my app is in the background for a period of time (could be a few mins) then when I bring the app back into the foreground the queries are very slow to return data. This does not happen on iOS. It only happens on Android. I use CircularProgressIndicators when my app is busy retrieving data from Firestore. I am

问题 I have a program that I get a list of users from Firebase's cloud Firestore, and display them in a Listview using a StreamBuilder in Flutter. The number of users will be large, and I want to implement a search field in my streambuilder that will query results that match my search field. I want it to look like this: --photo credit: https://blog.usejournal.com/flutter-search-in-listview-1ffa40956685 My Streambuilder that looks like the following: StreamBuilder<QuerySnapshot>( stream: Firestore

问题 Currently working on a little app that allows users to view a database stored on Heroku, however I am running into the aforementioned issue when using the database's URL: ".herokuapp.com/api/". var client = createHttpClient(); var response = await client.read('<example>.herokuapp.com/api/<data>'); List data = JSON.decode(response); Heroku doesn't seem to use HTTP(S) nor www, the latter of which I believe to be the issue. Does anyone know how I can bypass or resolve this issue? 回答1: I know

问题 Currently working on a little app that allows users to view a database stored on Heroku, however I am running into the aforementioned issue when using the database's URL: ".herokuapp.com/api/". var client = createHttpClient(); var response = await client.read('<example>.herokuapp.com/api/<data>'); List data = JSON.decode(response); Heroku doesn't seem to use HTTP(S) nor www, the latter of which I believe to be the issue. Does anyone know how I can bypass or resolve this issue? 回答1: I know

问题 I am trying to make stack layout scrollable using SingleChildScrollView but it's not scrolling. Is SingleChildScrollView should be used here? I think I have given enough description to make anyone understand my question. More text here to satisfy StackOverflow's requirement to ask a question. Sorry about this. Here's example code. @override Widget build(BuildContext context) { return Scaffold( body: SafeArea( child: Container( child: Center( child: LayoutBuilder( builder: (BuildContext