BottomNavigationBar | Material design 更新的BottomNavigationbar的开源实现 | Frontend Framework library

As the title above, I want the page I've scrolled down to scroll back up when the BottomNavigationBar is pressed (double-pressed). I've managed to make it, no problem. But there is a problem if on the page there is contain a TabBar.

For Example I have a bottom navigation bar, that contains two pages:

HomePage and ProfilePage

On the HomePage I have a TabBar, and that contains two pages also:

FirstTabBarView and SecondTabBarView

The problem is when I've scrolled those two pages down (HomePage & ProfilePage at a different) I just want the FirstTabBarView view page to scroll to the top if I'm currently opening the FirstTabBarView page. But from my code, if I press the BottomNavigationBar button twice, both FirstTabBarView and SecondTabBarView both scroll up.

This is just a simple code sample, you can copy-paste and test it on the dart pad directly

I am currently localizing my app, I have translates all the webpages to be opened and added the url to my arb files.

But when i call the AppLocalizations.of(context)!.actionaid on initialUrl i get a red underline saying Invalid constant value

Is there any way I could make this work?

Thanks guys

I have something like this:

i am new to flutter, i'm trying to invisible button when there is no data in Firebase.

To get data i'm using StreamBuilder, if snapshot.data!.docs is null i want to invisible CustomButton which is outside of StreamBuilder.

StreamBuilder:

Imagine I have a parent widget and a child widget. In the parent widget, there is a variable: 'page index'. And the child widget needs to change that variable in a set state method (because it has to be refreshed). How can I do this?

The body of the scaffold renders content based on the pageindex.

everyone! I'm begging for help. I have a StatefulWidget in which I call AlertDialog, created initState and setState, but button colour changes only if I close and reopen AlertDialog, not immediately when clicked. I need to figure out how to redraw this window or some other way. There's another problem, if I put the FloatingActionButton in a separate file and therefore in a separate StatefulWidget, the list itself doesn't update when I click Add, but if I put the FloatingActionButton back in the homepage, everything works. But that's an additional question) A big request for help with the ElevatedButton "Work" inside the AlertDialog.

I'm making a bottom navigation bar using Inkwell, but as much as I tried solutions, I couldn't separate each icon in its respective space, I don't know what is failing me.

I tried with materialbuttom but the result was almost the same, although if there is any other alternative or suggestion I would like to know! Thankyou

I added the code

I am able to navigate to multiple different pages with visible bottom navigation bar on all pages but not able to switch between all of them so how can I switch between tabs with bottom bar being there in all pages

I got till here using this Answer but not able to make it work i.e to switch between bottom navigation tabs...

in short I want to add view for my message tab i.e second tab and move to it also without losing my bottom navigation bar for every page i navigate to...

so far my code,

I'm using image picker to get the image , and once it's uploaded , I'd like to pass and display it on a different screen. now I'm getting this error

type 'String' is not a subtype of type 'File'

First screen :

As the title mentions, I'm currently creating a guitar application that is to include some information on basic notes and chords, a chord generator, and of course a guitar tuner. I've decided to start with what I believe is the hardest part and unfortunately making little to no progress.

I'd like to include a BottomNavigationBar to navigate between these three tools, each taking up one page. I can get the navigation to work while using StatelessWidget, but once I start using _TunerState for recording purposes I start receiving errors.

I've managed to get this tool working in a separate application using just the main.dart but integrating that solution into my project is proving difficult.

What I intend to do is use the _TunerState class to initialize and start the flutter_fft recorder, which will listen for changes in the mic input and output information such as frequency, note, etc.

Below is my home_widget.dart, in charge of the navigation, or at least that's what I'm trying to do with it