Question

我正在构建此Flutter应用。我的问题是我无法在一个屏幕上放置所有小部件。尽管它们的含义是相同的，但所有字体大小和图标似乎都不同。在ReusableCard中，当“容器高度”和“宽度”属性分别设置为200和250时，整个应用程序会调整大小，但它们并不统一，如图所示。有人有建议吗？

import 'results_page.dart';
import 'package:flutter/material.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';
import 'icon_content_widget.dart';
import 'reusable_card.dart';
import 'bottom_button.dart';
import 'calculator_brain.dart';

import 'constants.dart';

enum GenderType {
  male,
  female,
}

class InputPage extends StatefulWidget {
  @override
  _InputPageState createState() => _InputPageState();
}

class _InputPageState extends State<InputPage> {
  GenderType selectedGender;
  int height = 180;
  int weight = 60;
  int age = 20;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('CALCULATE BMI'), centerTitle: true),
      body: ListView(
        scrollDirection: Axis.vertical,
        children: <Widget>[
          Padding(
            padding: const EdgeInsets.all(5.0),
            child: Container(
              child: FittedBox(
                child: Material(
                  color: Color(0xFF00053C),
                  child: Row(
                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                    children: <Widget>[
                      Container(
                        child: ReusableCard(
                          onPress: () {
                            setState(() {
                              selectedGender = GenderType.male;
                            });
                          },
                          colour: selectedGender == GenderType.male
                              ? kActiveCardColor
                              : kInactiveCardColor,
                          cardChild:
                              IconContentWidget('MALE', FontAwesomeIcons.mars),
                        ),
                      ),
                      Container(
                        child: ReusableCard(
                          onPress: () {
                            setState(() {
                              selectedGender = GenderType.female;
                            });
                          },
                          colour: selectedGender == GenderType.female
                              ? kActiveCardColor
                              : kInactiveCardColor,
                          cardChild: IconContentWidget(
                              'FEMALE', FontAwesomeIcons.venus),
                        ),
                      ),
                    ],
                  ),
                ),
              ),
            ),
          ),
          Padding(
            padding: const EdgeInsets.all(1.0),
            child: Container(
              child: FittedBox(
                child: Material(
                  color: Color(0xFF00053C),
                  child: Row(

                    children: <Widget>[
                      Container(
                        child: ReusableCard(
                          colour: kActiveCardColor,
                          cardChild: Column(
                            mainAxisAlignment: MainAxisAlignment.center,
                            children: <Widget>[
                              Text('HEIGHT', style: kLabelTextStyle),
                              Row(
                                mainAxisAlignment: MainAxisAlignment.center,
                                crossAxisAlignment: CrossAxisAlignment.baseline,
                                textBaseline: TextBaseline.alphabetic,
                                children: <Widget>[
                                  Text(height.toString(),
                                      style: kNumberTextStyle),
                                  Text('cm', style: kLabelTextStyle),
                                ],
                              ),
                              SliderTheme(
                                data: SliderTheme.of(context).copyWith(
                                  activeTrackColor: Colors.white,
                                  inactiveTrackColor: Color(0xFF8D8E98),
                                  thumbColor: Color(0xFFEB1555),
                                  overlayColor: Color(0x29EB1555),
                                  thumbShape: RoundSliderThumbShape(
                                      enabledThumbRadius: 15.0),
                                  overlayShape: RoundSliderOverlayShape(
                                      overlayRadius: 30.0),
                                ),
                                child: Slider(
                                  value: height.toDouble(),
                                  min: 120.0,
                                  max: 220.0,
                                  onChanged: (double newValue) {
                                    setState(() {
                                      height = newValue.round();
                                    });
                                  },
                                ),
                              ),
                            ],
                          ),
                        ),
                      ),
                    ],
                  ),
                ),
              ),
            ),
          ),
          Padding(
            padding: const EdgeInsets.all(5.0),
            child: Container(
              child: FittedBox(
                child: Material(
                  color: Color(0xFF00053C),
                  child: Row(
                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                    children: <Widget>[
                      Container(
                        child: ReusableCard(
                          colour: kActiveCardColor,
                          cardChild: Column(
                            mainAxisAlignment: MainAxisAlignment.center,
                            children: <Widget>[
                              Text(
                                'WEIGHT(Kg)',
                                style: kLabelTextStyle,
                              ),
                              Text(
                                weight.toString(),
                                style: kNumberTextStyle,
                              ),
                              Row(
                                mainAxisAlignment: MainAxisAlignment.center,
                                children: <Widget>[
                                  RoundIconButton(
                                    iconName: FontAwesomeIcons.minus,
                                    onPressed: () {
                                      setState(() {
                                        weight--;
                                      });
                                    },
                                  ),
                                  SizedBox(
                                    width: 15.0,
                                  ),
                                  RoundIconButton(
                                    iconName: FontAwesomeIcons.plus,
                                    onPressed: () {
                                      setState(() {
                                        weight++;
                                      });
                                    },
                                  ),
                                ],
                              ),
                            ],
                          ),
                        ),
                      ),
                      Container(
                        child: ReusableCard(
                          colour: kActiveCardColor,
                          cardChild: Column(
                            mainAxisAlignment: MainAxisAlignment.center,
                            children: <Widget>[
                              Text(
                                'AGE',
                                style: kLabelTextStyle,
                              ),
                              Text(age.toString(), style: kNumberTextStyle),
                              Row(
                                mainAxisAlignment: MainAxisAlignment.center,
                                children: <Widget>[
                                  RoundIconButton(
                                    iconName: FontAwesomeIcons.minus,
                                    onPressed: () {
                                      setState(() {
                                        age--;
                                      });
                                    },
                                  ),
                                  SizedBox(
                                    width: 15.0,
                                  ),
                                  RoundIconButton(
                                    iconName: FontAwesomeIcons.plus,
                                    onPressed: () {
                                      setState(() {
                                        age++;
                                      });
                                    },
                                  )
                                ],
                              ),
                            ],
                          ),
                        ),
                      ),
                    ],
                  ),
                ),
              ),
            ),
          ),
          BottomButton(
            buttonTitle: 'CALCULATE',
            onTap: () {
              CalculatorBrain calc =
                  CalculatorBrain(height: height, weight: weight);
              print(calc);
              Navigator.push(
                context,
                MaterialPageRoute(
                  builder: (context) {
                    return ResultsPage(
                        bmiResult: calc.calculateBMI(),
                        interpretation: calc.getInterpretation(),
                        resultText: calc.getResult());
                  },
                ),
              );
            },
          ),
        ],
      ),
    );
  }
}

class RoundIconButton extends StatelessWidget {
  final Function onPressed;
  final IconData iconName;

  RoundIconButton({@required this.iconName, this.onPressed});
  @override
  Widget build(BuildContext context) {
    return RawMaterialButton(
      shape: CircleBorder(),
      fillColor: Color(0xFF4C4F5E),
      constraints: BoxConstraints.tightFor(width: 56.0, height: 56.0),
      elevation: 0.0,
      onPressed: onPressed,
      child: Icon(iconName),
    );
  }
}


class ReusableCard extends StatelessWidget {
  ReusableCard({@required this.colour, this.cardChild, this.onPress});
  final Color colour;
  final Widget cardChild;
  final Function onPress;

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onTap:  onPress,
      child: Container(
        height: 200,
        width: 250,
        child: cardChild,
        margin: EdgeInsets.all(5.0),
        decoration: BoxDecoration(
          color: colour,
          borderRadius: BorderRadius.circular(10.0),
        ),
      ),
    );
  }
}[![enter image description here][1]][1]

如何将所有这些flutter小部件放在一个屏幕中？

0 个答案: