Values doesn't match between picker and onchanged

[MauserTom]

That's my code snippet. When I change the value due scrolling, the first number does only the change and when i use the decimal Value it alway jumps back to the inital value( first digit).

` NumberPicker.decimal(

            decoration: BoxDecoration(
              backgroundBlendMode: BlendMode.modulate,
              color: shinyColor,
            ),
            highlightSelectedValue: false,
            initialValue: fieldData.amount,
            minValue: 0,
            maxValue: 6,
            onChanged: (newValue) {
              print(newValue);
              _controllerAmount.sink.add(newValue);
              fieldData.amount = newValue;
            },
          ),
          Padding(
            padding: EdgeInsets.only(top: 10),
            child: StreamBuilder(
              stream: streamAmount,
              initialData: fieldData.amount,
              builder: (context, snapshot) => Text(
                '${snapshot.requireData} to/ha',
                style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold),
              ),
            ),
          ),
        ],
      ),
    ),`

[amittel]

Hi,
I have a similar problem. I made a gif.

And here is the dart file:

import 'dart:async';
import 'package:flutter/material.dart';
import 'package:numberpicker/numberpicker.dart';

class Circle extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Circle"),
      ),
      body: new Home(title: 'NumberPicker'),
    );
  }
}

//Our Home stateful widget class
class Home extends StatefulWidget {
  //Our `Home` constructor
  //Receives a Key and title
  //A Key is an identifier for Widget
  Home({Key key, this.title}) : super(key: key);

  final String title;

  //Creates the mutable state for this widget at a given location in the tree.
  @override
  _HomeState createState() => new _HomeState();
}

//Our Home state. State is the logic and internal state for a StatefulWidget
class _HomeState extends State<Home> {
  int _rounds = 0;
  int stations = 0;
  int loadMin = 0;
  int loadSec = 0;
  double _load = 0.0;

  NumberPicker decimalNumberPicker;

  _handleValueChanged(num value) {
    if (value != null) {
      if (value is int) {
        setState(() => _rounds = value);
        //integerNumberPicker.animateInt(value);
      } else {
        setState(() => _load = value);
        //decimalNumberPicker.animateDecimalAndInteger(value);
      }
    }
  }

  Widget build(BuildContext context) {
    decimalNumberPicker = new NumberPicker.decimal(
        initialValue: _load,
        minValue: 0,
        maxValue: 60,
        decimalPlaces: 2,
        onChanged: _handleValueChanged);

    return new Scaffold(
        body: ListView(
      children: <Widget>[
        ListTile(
          leading: Icon(Icons.cached),
          title: Text('Rounds'),
          //subtitle: Text('A strong animal'),
          trailing: (new Text("$_rounds")),
          onTap: () {
            print('Rounds tapped');
          },
          selected: true,
        ),
        ListTile(
          leading: Icon(Icons.fitness_center),
          title: Text('Stations'),
          //subtitle: Text('A strong animal'),
          trailing: (new Text("$stations")),
          onTap: () {
            print('horse');
          },
          selected: true,
        ),
        ListTile(
          leading: Icon(Icons.directions_run),
          title: Text('Load'),
          //subtitle: Text('A strong animal'),
          trailing: (new Text("$_load")),
          onTap: () {
            print('horse');
            showModalBottomSheet(
                context: context,
                builder: (BuildContext bc) {
                  return Container(
                    child: new Wrap(
                      children: <Widget>[
                        decimalNumberPicker,
                      ],
                    ),
                  );
                });
          },
          selected: true,
        ),
        ListTile(
          leading: Icon(Icons.pause),
          title: Text('Pause'),
          //subtitle: Text('A strong animal'),
          trailing: (new Text("00:00")),
          onTap: () {
            print('horse');
          },
          selected: true,
        ),
        ListTile(
          leading: Icon(Icons.local_drink),
          title: Text('Pause Rounds'),
          //subtitle: Text('A strong animal'),
          trailing: (new Text("00:00")),
          onTap: () {
            print('horse');
          },
          selected: true,
        ),
        FlatButton(
          child: Text('Start'),
          color: Colors.deepOrangeAccent,
          textColor: Colors.white,
          onPressed: () {},
        ),
      ],
    ));
  }
}

[MauserTom]

Hello, maybe because you are creating everytime a new decimalPicker when you call setState() in your build() tree.

Here:

` Widget build(BuildContext context) {
    decimalNumberPicker = new NumberPicker.decimal(
        initialValue: _load,
        minValue: 0,
        maxValue: 60,
        decimalPlaces: 2,
        onChanged: _handleValueChanged);

    return new Scaffold`

Try to implement directly in the Wrap widget.

[rafaelsetragni]

Ive find the same problem.

Future<int> pickBadgeCount(BuildContext context) async {
    int amount ;

    AlertDialog alert = AlertDialog(
      title: Text("Choose the new badge amount"),
      content: NumberPicker.integer(
          initialValue: 50,
          minValue: 0,
          maxValue: 999,
          onChanged: (newValue) => amount = newValue
      ),
      actions: [
        FlatButton(
          child: Text("Cancel"),
          onPressed: (){
            amount = null;
            Navigator.of(context).pop();
          },
        ),
        FlatButton(
          child: Text("OK"),
          onPressed: () {
            Navigator.of(context).pop();
          },
        ),
      ],
    );

    // show the dialog
    await showDialog(
      context: context,
      builder: (BuildContext context) => alert
    );

    return amount;
  }

[MarcinusX]

Is it still a problem?