FloatButton | 浮动按钮，可用于活动悬浮按钮。

Getting error while posting something:- Invalid attempt to spread non-inerrable instance. In order to be inerrable, non-array objects must have a Symbol. Iterator method.

I think it's occur in add Post but don't why it's occur. Can someone please tell me why? I don't know what cause error or why

here is my code

I need help opening dialog with press float button in activity fragment.

The application does not mark any error, but pressing the floatbutton does not mark anything and does not take any action, they could help me.

The button has the following style:

Trying to implement a alternate color for every other widget I add.... Like a dark and light approach to better separate each widget.

If I add a new widget I want color (1, 0, 0, 1) and when I add another one it should be (0, 1, 0, 1)

This code replicates a really simple version of my app. I'd love some help please in understanding how to implementing this.

Thanks

Main.py

Version:
Flutter-Version: 1.12.14 channel dev
Dart-Version: 2.7.0

Question:
I wan write a Todo App. when i click floatbutton add a new Todo, but in some cases its not work well.

The problem in Scaffold.body, detials in code.

it work well when i use TodoPage(todoList: _todoList).

_pageList.elementAt(_activeIndex) is not work when i submit textfield .

I found the print('Build Home')print after submit but print('Build TodoPage') not print.

why???

My Code:

I am trying to create a Floating Action button in swift programmatically. I used this video I found on youtube to create one, and it worked, despite some faults. The other problem is that the video is in Hindi so there are some parts that I don't understand completely. https://www.youtube.com/watch?v=xArCnGGzZEE

While it is a good video, there are some faults that I am trying to solve for my own use. The first was that when the floating button is pressed the blur view appears, but it only worked for portrait orientation. I managed to fix this problem, but the other problem has me lost.

So the floating action button works, and a clear view that holds a few buttons appears. The problem is that when the orientation changes with the buttons out, and I change the orientation the buttons disappear. If I change the orientation back to the orientation I pressed the floating action button on, the view with the buttons appear again. That means that the view is going somewhere, and I tried to find it, but I couldn't figure out how to do it without the constraints causing an error.

To help prove my point, this is what the view looks like.

this is what it looks like when i press the floating action button, and it works well

this is where the problem comes. I left the camera and photo button out as I change the device orientation.

If I change the orientation back to portrait, the camera and photo buttons come back, so that means that the placement of the buttons are moving out of view.

this is weird too because if i press the floating action button while to device is in landscape orientation it works well.

and i change the orientation to portrait and the camera and photo button vanish too. I know that it should still be there, because the blur view is still working.

This is the view for the button.

I noticed a bug in my app where variables were being reset to their initial value after text messages and phone calls - This error doesn't occur every time.

It is almost as if onCreate had been called again as the onResume and onStart methods only hold functions to bind to services and save co-ordinates for a floating button.

Is there any explanation for this? Has anyone else had this issue?

My app lifecycle methods as below

I have a webform and the user needs to click on 'save' often. So I'm trying to float the Save Button.

I have a layout XML and when I click on a floatbutton, I create a layout programmatically, so that the data of this layout is passed to this new one.

Here's my XML: