Got the following error when including the package

[sarcastic-verma]

Compiler message: ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:218:12: Error: Expected an identifier, but got '('. setState(() { ^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:218:15: Error: Expected ')' before this. setState(() { ^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:222:3: Error: A method declaration needs an explicit list of parameters. Try adding a parameter list to the method declaration. _yController.value = 1.0; ^^^^^^^^^^^^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:222:22: Error: Only factory constructor can specify '=' redirection. Try making this a factory constructor, or remove the redirection. _yController.value = 1.0; ^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:222:24: Error: Expected an identifier, but got '1.0'. _yController.value = 1.0; ^^^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:222:24: Error: Expected ';' after this. _yController.value = 1.0; ^^^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:222:3: Error: The name of a constructor must match the name of the enclosing class. _yController.value = 1.0; ^^^^^^^^^^^^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:222:24: Error: Expected a class member, but got '1.0'. _yController.value = 1.0; ^^^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:222:27: Error: Expected a class member, but got ';'. _yController.value = 1.0; ^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:224:27: Error: Expected ')' before this. _indexToPosition(index) / MediaQuery ^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:223:3: Error: The name of a constructor must match the name of the enclosing class. _xController.animateTo( ^^^^^^^^^^^^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:230:24: Error: Non-optional parameters can't have a default value. Try removing the default value or making the parameter optional. Duration(milliseconds: 500) * widget.animationFactor, ^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:230:31: Error: Expected ')' before this. Duration(milliseconds: 500) * widget.animationFactor, ^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:229:3: Error: The name of a constructor must match the name of the enclosing class. Future.delayed( ^^^^^^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:236:26: Error: Expected an identifier, but got '0.0'. _yController.animateTo(0.0, ^^^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:237:11: Error: Non-optional parameters can't have a default value. Try removing the default value or making the parameter optional. duration: Duration(milliseconds: 300) * widget.animationFactor); ^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:236:3: Error: The name of a constructor must match the name of the enclosing class. _yController.animateTo(0.0, ^^^^^^^^^^^^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:236:3: Error: '_FluidNavBarState.animateTo' is already declared in this scope. _yController.animateTo(0.0, ^^^^^^^^^^^^^^^^^^^^^^^^^^^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:223:3: Context: Previous declaration of '_FluidNavBarState.animateTo'. _xController.animateTo( ^^^^^^^^^^^^^^^^^^^^^^^^... ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:239:3: Error: Expected a class member, but got 'if'. if (widget.onChange != null) { ^^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:239:6: Error: Expected an identifier, but got '('. if (widget.onChange != null) { ^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:239:23: Error: Expected an identifier, but got '!='. if (widget.onChange != null) { ^^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:239:26: Error: Expected ')' before this. if (widget.onChange != null) { ^^^^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:239:7: Error: Type 'widget.onChange' not found. if (widget.onChange != null) { ^^^^^^^^^^^^^^^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:218:3: Error: The method '_FluidNavBarState.setState' has fewer positional arguments than those of overridden method 'State.setState'. setState(() { ^ ../../flutter/packages/flutter/lib/src/widgets/framework.dart:1196:8: Context: This is the overridden method ('setState'). void setState(VoidCallback fn) { ^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:74:7: Error: The implementation of 'setState' in the non-abstract class '_FluidNavBarState' does not conform to its interface. class _FluidNavBarState extends State<FluidNavBar> ^^^^^^^^^^^^^^^^^ ../../flutter/packages/flutter/lib/src/widgets/framework.dart:1196:8: Context: The method 'State.setState' has more required arguments than those of overridden method '_FluidNavBarState.setState'. void setState(VoidCallback fn) { ^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:218:3: Context: This is the overridden method ('setState'). setState(() { ^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:69:26: Error: Method not found: '_FluidNavBarState'. State createState() => _FluidNavBarState(); ^^^^^^^^^^^^^^^^^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:91:15: Error: Too many positional arguments: 0 allowed, but 1 found. Try removing the extra positional arguments. setState(() {}); ^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:222:22: Error: Expected a function body or '=>'. Try adding {}. _yController.value = 1.0; ^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:222:24: Error: Constructors can't have a return type. Try removing the return type. _yController.value = 1.0; ^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:237:13: Error: Constant expression expected. Try inserting 'const'. duration: Duration(milliseconds: 300) * widget.animationFactor); ^^^^^^^^ ../../flutter/.pub-cache/hosted/pub.dartlang.org/fluid_bottom_nav_bar-1.0.1/lib/src/fluid_nav_bar.dart:237:43: Error: Getter not found: 'widget'. duration: Duration(milliseconds: 300) * widget.animationFactor); ^^^^^^

[eric-taix-teads]

The stack trace is unreadable... I don't know what happens for you, but clearly this is not an issue of this library. Many people use this version without any issue.

[eric-taix]

Did you solve your issue? If yes can you provide more relevant informations how you solved it to help others in cas they encounter the same issue?

[sarcastic-verma]

Did you solve your issue? If yes can you provide more relevant informations how you solved it to help others in cas they encounter the same issue?

Unfortunately, I couldn't solve the issue.

[eric-taix]

Did you try flutter clean, upgrade to the latest stable version of SDK, flutter and this library? It seems to be a compilation error on the library code itself

[sarcastic-verma]

Yes I did that...it didn't seem to work at that point but I'll do it again just in case.

[eric-taix]

Since there is no additional information, I close this problem. Do not hesitate to reopen it if necessary.