The named parameter ' ' isnt defined

November 1, 2022

I’m getting errors in my flutter app after an upgrade to flutter 3.3.6. The named parameters which throws errors as ‘aren’t defined’ : elevation, color, shape

The snippet where i get the errors is listed below :

return ButtonTheme(
  minWidth: 110,
  child: RaisedButton(
      elevation: 0,
      child: isLoading
          ? _buildLoadingIndicatorWithColor(textColor)
          : Text(
              text,
              style: TextStyle(
                  color: textColor,
                  fontWeight: FontWeight.bold,
                  fontSize: 16),
            ),
      color: communityColor,
      onPressed: onPressed,
      shape: new RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(borderRadius))),
);

}

Here is another snippet where a similar error appears and the textColor parameter throws the same error :

return ButtonTheme(
  minWidth: minWidth,
  height: height,
  child: FlatButton(
    textColor: Colors.black87,
    child: this.child,
    onPressed: this.onPressed,
  ),
);

As per the following documentation I read https://docs.flutter.dev/release/breaking-changes/buttons, there are changes that are needed to make it work. Help appreciated as I’m very new to flutter and a beginner to programming

>Solution :

RaisedButton is deprecated. You can use ElevatedButton(). Please check below code.

ButtonTheme(
      minWidth: 110,
      child: ElevatedButton(
        style: ElevatedButton.styleFrom(
          elevation: 0,
          backgroundColor: communityColor,
          shape: new RoundedRectangleBorder(),
        ),
        child: isLoading
            ? _buildLoadingIndicatorWithColor(textColor)
            : Text(
                text,
                style: TextStyle(color: textColor, fontWeight: FontWeight.bold, fontSize: 16),
              ),
        onPressed: onPressed,
      ),
    );