CircularButton | Circular button for Android | Android library

1. I am pulling Quiz data from API, and using StreamBuilder
2. Using PageView.builder to show each Question & Options in separate page
3. RadioListTile for Options and using maps to iterate answers from List

The Issue is --> whenever I select any Option in any of the question, the question changes automatically but Index does not, and I am unable to select any Option on any Question.

I hope I was able to explain my issue well.

Attaching JSON, PageView.Builder code.

PageView Controller

This is my dart file where I want to create a Expandable floating button which is wrapped in Stack widget and I have created a custom IconButton named as CircularButton for Expandable FAB when I try to provide onTap/onPressed gesture in GestureDetector widget or my CircularButton custom widget it does nothing no error and on press of icon it doesnt open to respective app. I tried chaning the return type of customLaunch but that didnt worked too. You Can also check this for better understanding Expandable Fab Using stack Any help is appreciated. thank you,

Using the following code, I am able to retrieve the username of the currently logged in user but when I try to display it, it displays as null.

I have a flutter project with a FloatingSearchBar from this library (pub.dev). I have four buttons, one of which is a GestureDetector (which is not really important but explains some behind scenes info).

This all looks like this:

or this:

or one other variation.

These buttons all work fine, although I've spent a lot of time getting them that way. They are toggleable, and their Icons are decided by a variable that can be updated using setState.

There's also, however, this layout:

which should be able to be toggled on and off by this switch/button inside the menu:

It too just updates the offlineMode variable inside a setState. But this setState doesn't update the search bar until I force the bar to update by clicking any of the buttons.

Why is setState not working in this particular circumstance?

I have the following javascript to get some information back that should be displayed on the page

I am using the following code in which I am unable to detect button click on subButtons. The click on main button works just fine as it displays and hides and subButtons. There are three sub-buttons behind the main button and they come out when main button is pressed. I got this code from : https://www.youtube.com/watch?v=S7KG4prI7A4 I never really understood animations in flutter but this was a good starting point. My knowledge in animation is limited to the to something basic such as Hero Widget.

I have followed a couple of tutorials on creating a custom floating action button and have successfully recreated it and customized to my liking. BUT, I am experiencing a beginner issue, whereas I cannot figure out how to/where start building the main body of content.

To be more specific, I want to build a video feed (like an instagram/youtube style), but have the FAB (floating action button) as the menu which will be available on this and a few other screens.

How do I/where in the code do I start to build my main body of content?

Please find my current code below for the custom action button and animation. Thanks for your time.