Flutter Slider

Flutter series overall directory

Attributes	Explanation
value	Position control
onChanged	Callback change
onChangeStart	Once when the slide began to call back
onChangeEnd	Callback once the end of the slide
me	Minimum
max	Maximum
divisions	Divided into pieces, such as setting 5, Slider slides only 5 positions
label	divisions disposed on the node label displayed
activeColor	Color slides over a region
inactiveColor	Color is not slid over the region

example:

import 'package:flutter/material.dart';

class SliderDemo extends StatefulWidget {
  @override
  State<StatefulWidget> createState() => _SliderDemo();
}

class _SliderDemo extends State<SliderDemo> {
  double _value = 0;
  int _dollars = 20;

  @override
  Widget build(BuildContext context) {
    // TODO: implement build
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: <Widget>[
        Slider(
          value: _value,
          onChanged: (newValue) {
            print('onChanged:$newValue');
            setState(() {
              _value = newValue;
            });
          },
          onChangeStart: (startValue) {
            print('onChangeStart:$startValue');
          },
          onChangeEnd: (endValue) {
            print('onChangeEnd:$endValue');
          },
          label: '$_value dollars',
          divisions: 5,
          semanticFormatterCallback: (newValue) {
            return '${newValue.round()} dollars';
          },
        ),
        Slider(
            value: _dollars.toDouble(),
            min: 20.0,
            max: 330.0,
            label: '$_dollars dollars',
            onChanged: (double newValue) {
              setState(() {
                _dollars = newValue.round();
              });
            },
            semanticFormatterCallback: (double newValue) {
              return '${newValue.round()} dollars';
            }),

      ],
    );
  }
}