NoSuchMethodError: The getter 'value' was called on null.

[mehrdad-shokri]

════════ Exception caught by widgets library ════════════════
The following NoSuchMethodError was thrown building AnimatedBottomNavigationBar(dirty, dependencies: [_ScaffoldScope, _EffectiveTickerMode], state: _AnimatedBottomNavigationBarState#a9a1c):
The getter 'value' was called on null.
Receiver: null
Tried calling: value

pubsepc.yaml
animated_bottom_navigation_bar: 0.1.2+2

home.dart:

Scaffload(
   ...
    bottomNavigationBar: AnimatedBottomNavigationBar(
        icons: [Icons.brightness_5, Icons.brightness_4],
        activeIndex: _bottomNavigationIndex,
        gapLocation: GapLocation.center,
        notchSmoothness: NotchSmoothness.verySmoothEdge,
        leftCornerRadius: 32,
        rightCornerRadius: 32,
        onTap: (index) => setState(() => _bottomNavigationIndex = index),
        //other params
      )
);

It's this line:
width: widget.gapWidth * widget.notchAndCornersAnimation.value, line 212 animated_bottom_navigation_bar.dart

[nkenna]

ANy solution to this?

[mehrdad-shokri]

@nkenna refer to the example you need to provide notchAndCornersAnimation argument to the AnimatedBottomNavigationBar

[TimilehinEmmanuelOJO]

@nkenna refer to the example you need to provide notchAndCornersAnimation argument to the AnimatedBottomNavigationBar

i have done this but still experiencing the same error

[doppio]

The README doesn't mention this parameter and the internal documentation describes it as optional. Does the documentation need to be updated or should it actually be optional?

[mehrdad-shokri]

@doppio previously I read the source code it calls this member value and does not initialize anywhere by itself so I guess README should be updated

[LuizFmdr]

Esse problema esta corrigido no meu fork.
Add to pubspec.yaml:
animated_bottom_navigation_bar:
git:
url: https://github.com/LuizFilipeMedeira/animated-bottom-navigation-bar-flutter
ref: master

[dxganta]

Add this bit of code in your initState and the error will go away:

final systemTheme = SystemUiOverlayStyle.light.copyWith(
systemNavigationBarColor: Colors.black,
systemNavigationBarIconBrightness: Brightness.light,
);
SystemChrome.setSystemUIOverlayStyle(systemTheme);

[yash-dxt]

I'm getting the same issue but on line 236.
This happens when I put:
gapLocation: GapLocation.end
Also, I'm using a floating action button here.

[is10vmust]

Same here , any one have a solution

[is10vmust]

Esse problema esta corrigido no meu fork.
Add to pubspec.yaml:
animated_bottom_navigation_bar:
git:
url: https://github.com/LuizFilipeMedeira/animated-bottom-navigation-bar-flutter
ref: master

Thats worked with me @LuizFilipeMedeira Thanks