New post on /r/flutterdev subreddit:

39 Uploading Images to firebase (Flutter e-commerce): final
https://www.youtube.com/attribution_link?a=NcSIMpP7dYs&u=%2Fwatch%3Fv%3D36TIzyuaVFI%26feature%3Dshare

May 04, 2019 at 10:42AM by kibatheseven
http://bit.ly/2V2AqLa

New post on /r/flutterdev subreddit:

A study in Grid
http://bit.ly/2VJ6tEm

May 03, 2019 at 11:54PM by lacronicus
http://bit.ly/2LluJsd

New post on Flutter Dev Google group:

Please help needed am confused with the error am seeing Flutter project can't build or run
Launching lib\main.dart on Android SDK built for x86 in debug mode... Initializing gradle... Resolving dependencies... Running Gradle task 'assembleDebug'... FAILURE: Build failed with an exception. * What went wrong: Execution failed for task ':app:transformClassesWithMultidexlistForDebug'.

May 04, 2019 at 02:42PM by Emmanuel Agu Iroegbulam
http://bit.ly/2J4M7zN

New post on /r/flutterdev subreddit:

Real time stats monitor with Flutter and Firebase
http://bit.ly/2LkjD6Q

May 04, 2019 at 03:10PM by Nash0x7E2
http://bit.ly/2VJn5Me

New post on /r/flutterdev subreddit:

Responsive UI using Flutter SDK | Android & iOS
https://youtu.be/1sQotZtJQQk

May 04, 2019 at 03:56PM by prateeksharma1712
http://bit.ly/2VF259B

New post on /r/flutterdev subreddit:

Flutter, Notifications bubble up and values go down
Learn how to send notifications and values all along the UI widget tree in Flutter, with the following article:https://medium.com/@develodroid/flutter-notifications-bubble-up-and-values-go-down-c1a499d22d5f

May 04, 2019 at 03:39PM by develodroid
http://bit.ly/2VO8qzk

New post on Flutter Dev Google group:




May 04, 2019 at 04:34PM by Igor Samokhin
http://bit.ly/2VcvLLI

New post on Flutter Dev Google group:

Add the colour of structure link to make it more visualised
[image: Screenshot 2019-05-04 at 11.47.57 PM.png] I like the design of the link between structure, it can be improved by designing for different color to make the developer can identify the structure easily by looking at different color of the link. Hope you guys can understand what I mean.

May 04, 2019 at 05:51PM by OK
http://bit.ly/2H1JBGH

New post on /r/flutterdev subreddit:

Animations while switching tabs in BottomNavigationBar
Hey Flutter devs!​I was wondering if it would be possible to add animations or transitions while switching tabs, using a BottomNavigationBar widget.​Thanks!

May 04, 2019 at 05:27PM by jesusrp98
http://bit.ly/2H0BdHP

New post on /r/flutterdev subreddit:

How to add music / audio to your Flutter app
http://bit.ly/2LBFaIz

May 04, 2019 at 05:23PM by MarkOSullivan
http://bit.ly/2VdrCHn

New post on /r/flutterdev subreddit:

flutter app lifecycle
I want to delete the content of shared preferences whenever the app is killed, but I can't find something equivilant to onDestroy() method found in native android, the only thing i found was the dispose() method, if i used it on the root route would it work as onDestroy or not ? if not is there any alternative approach ?*another question: how does route tree work in flutter ? is it just like in android where there would be a stack of activities on top of each other with the first one being the root ?

May 04, 2019 at 08:33PM by byshy
http://bit.ly/2PJ4AST

New post on /r/flutterdev subreddit:

UI-As-Code: Ideas on how to improve Flutter UI coding
Hi,After playing with Flutter for a little while I got some ideas on how UI coding with imperative language (Dart) could be modernized and improved.As a native developer (Kotlin & Swift) , I could present you a large list of features I would like Dart to have. However, since nobody likes to read long boring articles, I'm going to describe just a couple of thoughts that popped into my head while I was trying to construct UI with Flutter.Okay, let's go. Given the following very very basic block of code:

return Container( constraints: BoxConstraints.expand( width: 200.0 ), margin: EdgeInsets.only(left: 50.0, right: 50.0), child: Column( children: [ Text('Hello'), Row( children: [ Text('there'), Text('world!’, style: style), ], ), ], ), ); 

what can we improve here?First of all, what do you think of these child and children parameter names? For me they seem to be redundant. It is already obvious that the nested elements are children, so, in my opinion, these parameters needlessly increase the code size. We could get rid of them if Dart supported optional positional and optional named arguments. However, the following issue is still open (wow, dates back to 2012): https://github.com/dart-lang/sdk/issues/7056Now take a closer look at the square brackets. Wouldn't it be great to be able to just pass the child elements as normal arguments instead of arrays? I think, it would. Surprisingly, this is currently not possible because Dart doesn't support varargs (wow, dates back to 2014): https://github.com/dart-lang/sdk/issues/16253Another amazing feature Dart could borrow from Swift is Visual Format. This could greatly simplify constraints & margins coding. The relevant link: https://developer.apple.com/library/archive/documentation/UserExperience/Conceptual/AutolayoutPG/VisualFormatLanguage.htmlMaybe it's just my personal preference, but I think that extensions in Swift are a piece of art. As a quick example, with extensions it would be possible to write something like this 'my_amazing_text'.withStyle(style). It's sad Dart still doesn't support it: https://github.com/dart-lang/language/issues/41If we stop here, take a deep breath, and apply these suggestions to the above-mentioned code here is the result we will be able to achieve:

return Container( layout: ‘|-50-200-50-|’, Column( 'Hello’, Row('there', 'world!'.withStyle(style) ) ) ); 

I would also remove the trailing semicolon, but that's enough for today. I guess, I already earned a bunch of downvotes for the above little critique of Dart. However, please don't get me wrong - I just felt the urge to share these thoughts with the community for our common benefit.Happy coding!

May 04, 2019 at 11:40PM by stuffokator
http://bit.ly/2GX8S4V

New post on /r/flutterdev subreddit:

Flutter Photo View & Gallery – Resize & Rotate + Image Carousel
http://bit.ly/2Lnypde

May 05, 2019 at 01:49AM by Purple_Pizzazz
http://bit.ly/2VEPQK8

New post on /r/flutterdev subreddit:

New to Dart. What does this line of code mean?
This is the whole line:

Function(String) get changeEmail => _emailController.sink.add; 

I'm trying to learn how BLoC and rxdart works. I'm confused about the left part of this line.

Function(String) get changeEmail => 

I understand that get is a shortcut for creating a getter function. My understanding of Function(String) is that it's a lexical closure and it might be using get changeEmail as part of its lexical scope.I'm confused because I find it strange that a getter is doing something that results in a mutation. My instincts say that it's wrong, but I'm almost sure that I'm wrong. Can anyone break this down for me? Also, is there another way to write this code?

May 05, 2019 at 02:28AM by outtascope
http://bit.ly/2V1r7Lt

New post on Flutter Dev Google group:

How to navigate to the home page after check the valid token from storage.
Hi everybody, I check the user authorization token at the HomePage Constructor, so if token is present and valid, i will call the Navigator pushAndRemoveUntil method to redirect to my dashboard. But pushAndRemoveUntil method needs context parameter, is that mean i just call it on build method?

May 05, 2019 at 04:42AM by favr...@gmail.com
http://bit.ly/2Vgd0qP

New post on /r/flutterdev subreddit:

BLoC vs MobX: Which would you recommend for large and complex Flutter apps?
Thoughts?Bonus: Which state management architecture will likely stick around in the long run and act as the industry standard?There are no right answers.

May 05, 2019 at 05:16AM by SocialMammoth
http://bit.ly/2GWMLvv

New post on /r/flutterdev subreddit:

Particle Animations with Flutter
http://bit.ly/2J0yhOz

May 05, 2019 at 09:06AM by felixlein
http://bit.ly/2JfVvjb

New post on /r/flutterdev subreddit:

FlutterForce — Week 25
http://bit.ly/2V1cTud

May 05, 2019 at 10:47AM by flutterist
http://bit.ly/2DPdKIu

New post on /r/flutterdev subreddit:

Question about app business logic in BLoC pattern
I decided to figure out how to use BLoC pattern for my flutter app. The sources that I used were medium article by Sagar Suri and documentation of BLoC library by Felix Angelov. Both sources suggest the similar architecture:uiScreen <-----> bloc <-----> repository <-----> dataThey say the purpose of the BLoC is to decouple ui and business logic.But I still feel that the whole layer is missing between bloc and repository. Every bloc is mapped to a screen so it is more like controller of ui state and not the business logic of the application because app's business logic is often ui agnostic. So basically if you handle your app's business logic inside bloc you just failed the only task BLoC had. Because now business logic is coupled with particular screen. And what will happen if for example you moved a button that initiated some processing from one screen to another? I guess you would have to move the part of business logic from one bloc to another.So I feel the real need to introduce something like services or interactors layer, where I would do the REAL business logic processing(some calculations, ML stuff, processing data from sensors or system broadcasts or whatever) which I would be able to use in blocs in case I need to show something to user or get input from user.The question is if it ok to do like this? And if yes how would I pass data from services to ui? In native Android ViewModel(some kind of alternative to bloc) could just pass observables from data layer to ui. But in BLoC pattern the stream which is passed to ui is stream of states not of data. And service layer should not know about states of some screen. So do I just await asynchronous services operations inside blocs and then convert this data to streams of states?Any help would be appreciated.

May 05, 2019 at 12:42PM by jeaced
http://bit.ly/2DQU8DW

New post on /r/flutterdev subreddit:

avataaar_image | Flutter Package
http://bit.ly/2Lo9OVG

May 05, 2019 at 01:00PM by tomwyr
http://bit.ly/2VOCaMw

New post on /r/flutterdev subreddit:

how to get gallery screen on my app
Not like an image picker where you pick images from the gallery but an app that opens up to a gallery screen with all images from gallery. From here i need to select the image i want to do some processing on the server side and get it back.

May 05, 2019 at 02:37PM by flutterman98
http://bit.ly/2J2LyGG