“Flatternbild” Code-Antworten

Flatternbild -Asset

// pubspec.yaml
flutter:
  assets:
    - graphics/

// Inside your widget
Image(image: AssetImage('graphics/background.png'))
Glamorous Gibbon

Flatternbild

import 'package:flutter/material.dart';

  void main() => runApp(MyApp());

  class MyApp extends StatelessWidget {
    @override
    Widget build(BuildContext context) {
      return MaterialApp(
        home: Scaffold(
          appBar: AppBar(
            title: Text("Image from assets"),
          ),
          body: Image.asset('assets/images/lake.jpg'), //   <--- image
        ),
      );
    }
  }
Lucky Lion

Flatternbildlast

Image.asset(name) is essentially Image(image: AssetImage(name)),
Image.file(path) is essentially Image(image: FileImage(File(path))),
Image.network(url) is essentially Image(image: NetworkImage(url)),
Image.memory(list) is essentially Image(image: MemoryImage(list))
Elated Eland

Bild -Widget in Flattern

Image(
  image: AssetImage("location/of/image"),
)
Manav Sarkar

flattern Bilder

// Update the pubspec.yaml file.
assets:  
    - assets/tablet.png  
    - assets/background.png  
    
Image.asset('assets/tablet.png'),  

// Display images from the internet
Image.network(  
  'https://picsum.photos/250?image=9',  
)
Tiny Coders

IMC flattern

import 'package:flutter/material.dart';

void main() {
  runApp(MaterialApp(
    debugShowCheckedModeBanner: false,
    home: Home(),
  ));
}

class Home extends StatefulWidget {
  @override
  _HomeState createState() => _HomeState();
}

class _HomeState extends State<Home> {

  String _info = "Informe seus dados.";

  GlobalKey<FormState> _formKey = GlobalKey<FormState>();

  TextEditingController pesoController = TextEditingController();
  TextEditingController alturaController = TextEditingController();

  void _resetFields()
  {
      pesoController.text = '';
      alturaController.text = '';
      setState(() {
        _info = "Informe seus dados.";
        _formKey = GlobalKey<FormState>();
      });
  }

  void _calcular(){
    setState(()
    {
      double peso = double.parse(pesoController.text);
      double altura = double.parse(alturaController.text) / 100;
      double imc = peso / ( altura * altura);
      print(imc);
      if(imc < 18.6){
        _info = 'Abaixo do Peso (${imc.toStringAsPrecision(3)})';
      } else if(imc >= 18.6 && imc < 24.9){
        _info = 'Peso Ideal (${imc.toStringAsPrecision(3)})';
      } else if(imc >= 24.9 && imc < 29.9){
        _info = 'Levemente Acima do Peso (${imc.toStringAsPrecision(3)})';
      } else if(imc >= 29.9 && imc < 34.9){
        _info = 'Obesidade Grau I (${imc.toStringAsPrecision(3)})';
      } else if(imc >= 34.9 && imc < 39.9){
        _info = 'Obesidade Grau II (${imc.toStringAsPrecision(3)})';
      } else if(imc >= 40){
        _info = 'Obesidade Grau III (${imc.toStringAsPrecision(3)})';
      }

    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Calcula IMC"),
        centerTitle: true,
        backgroundColor: Colors.green,
        actions: <Widget>[
          IconButton(icon: Icon(Icons.refresh), onPressed: _resetFields)
        ],
      ),
      backgroundColor: Colors.white,
      body: SingleChildScrollView(
        padding: EdgeInsets.fromLTRB(10, 0, 10, 0),
        child: Form(
          key: _formKey,
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: <Widget>[
              Icon(Icons.person_outline, size: 120.0, color: Colors.green),
              TextFormField(
                keyboardType: TextInputType.number,
                decoration: InputDecoration(
                    labelText: "Peso (kg)",
                    labelStyle: TextStyle(color: Colors.green)),
                textAlign: TextAlign.center,
                style: TextStyle(color: Colors.green, fontSize: 25.0),
                controller: pesoController,
                validator: (value){
                  if(value.isEmpty){
                    return "Insira seu Peso!";
                  }
                },
              ),
              TextFormField(
                keyboardType: TextInputType.number,
                decoration: InputDecoration(
                    labelText: "Altura (CM)",
                    labelStyle: TextStyle(color: Colors.green)),
                textAlign: TextAlign.center,
                style: TextStyle(color: Colors.green, fontSize: 25.0),
                controller: alturaController,
                validator: (value){
                  if(value.isEmpty){
                    return "Insira sua Altura!";
                  }
                },
              ),
              Padding(
                padding: EdgeInsets.only(top: 10.0, bottom: 10.0),
                child: Container(
                  height: 50,
                  child: RaisedButton(
                    onPressed: (){
                      if(_formKey.currentState.validate()){
                        _calcular();
                      }
                    },
                    child: Text('Calcular',style: TextStyle(color: Colors.white, fontSize: 25.0),),
                    color: Colors.green,
                  ),
                ),
              ),
              Text(_info,
                textAlign: TextAlign.center,
                style: TextStyle(color: Colors.green, fontSize: 25),
              )
            ],
          ),
        )
      )
    );
  }
}
Defeated Dingo

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