如何更改flutter中具有多個(gè)文本按鈕的容器的顏色？

Question 1

我有一個(gè)練習(xí)，上面有一個(gè)容器，下面有四個(gè)文本按鈕。當(dāng)我按下4個(gè)文本按鈕中的一個(gè)（每個(gè)按鈕都有另一種顏色）時(shí)，頂部的容器應(yīng)該會(huì)改變顏色。現(xiàn)在我知道這必須通過一個(gè)自定義函數(shù)實(shí)現(xiàn)，該函數(shù)要么采用文本按鈕的顏色，要么采用頂部容器的原始顏色。我可以通過為每種顏色分配一個(gè)數(shù)字作為變量并將其作為參數(shù)輸入到上面的colorwidget中來實(shí)現(xiàn)這一點(diǎn)嗎？

我有點(diǎn)受不了了。

thx.

Question 2

檢查這個(gè)例子

import 'package:flutter/material.dart';

class Home extends StatefulWidget {
  const Home({Key? key}) : super(key: key);

  @override
  _HomeState createState() => _HomeState();
}

class _HomeState extends State<Home> {
  Color color = Colors.amber;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text("Container color")),
      body: Column(
        crossAxisAlignment: CrossAxisAlignment.center,
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Center(
            child: Container(
              decoration: BoxDecoration(
                  color: color,
                  borderRadius: const BorderRadius.all(Radius.circular(10))),
              height: 100,
              width: 100,
            ),
          ),
          const SizedBox(
            height: 20,
          ),
          Column(
            children: [
              Padding(
                padding: const EdgeInsets.all(8.0),
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                  children: [
                    Center(
                      child: InkWell(
                        onTap: () {
                          setState(() {
                            color = Colors.amber;
                          });
                        },
                        child: Container(
                          decoration: const BoxDecoration(
                              color: Colors.amber,
                              borderRadius:
                                  BorderRadius.all(Radius.circular(10))),
                          height: 100,
                          width: 100,
                        ),
                      ),
                    ),
                    Center(
                      child: InkWell(
                        onTap: () {
                          setState(() {
                            color = Colors.blue;
                          });
                        },
                        child: Container(
                          decoration: const BoxDecoration(
                              color: Colors.blue,
                              borderRadius:
                                  BorderRadius.all(Radius.circular(10))),
                          height: 100,
                          width: 100,
                        ),
                      ),
                    )
                  ],
                ),
              ),
              Padding(
                padding: const EdgeInsets.all(8.0),
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                  children: [
                    Center(
                      child: InkWell(
                        onTap: () {
                          setState(() {
                            color = Colors.red;
                          });
                        },
                        child: Container(
                          decoration: const BoxDecoration(
                              color: Colors.red,
                              borderRadius:
                                  BorderRadius.all(Radius.circular(10))),
                          height: 100,
                          width: 100,
                        ),
                      ),
                    ),
                    Center(
                      child: InkWell(
                        onTap: () {
                          setState(() {
                            color = Colors.green;
                          });
                        },
                        child: Container(
                          decoration: const BoxDecoration(
                              color: Colors.green,
                              borderRadius:
                                  BorderRadius.all(Radius.circular(10))),
                          height: 100,
                          width: 100,
                        ),
                      ),
                    )
                  ],
                ),
              )
            ],
          )
        ],
      ),
    );
  }
}

Answer 1

檢查這個(gè)例子

import 'package:flutter/material.dart';

class Home extends StatefulWidget {
  const Home({Key? key}) : super(key: key);

  @override
  _HomeState createState() => _HomeState();
}

class _HomeState extends State<Home> {
  Color color = Colors.amber;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text("Container color")),
      body: Column(
        crossAxisAlignment: CrossAxisAlignment.center,
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Center(
            child: Container(
              decoration: BoxDecoration(
                  color: color,
                  borderRadius: const BorderRadius.all(Radius.circular(10))),
              height: 100,
              width: 100,
            ),
          ),
          const SizedBox(
            height: 20,
          ),
          Column(
            children: [
              Padding(
                padding: const EdgeInsets.all(8.0),
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                  children: [
                    Center(
                      child: InkWell(
                        onTap: () {
                          setState(() {
                            color = Colors.amber;
                          });
                        },
                        child: Container(
                          decoration: const BoxDecoration(
                              color: Colors.amber,
                              borderRadius:
                                  BorderRadius.all(Radius.circular(10))),
                          height: 100,
                          width: 100,
                        ),
                      ),
                    ),
                    Center(
                      child: InkWell(
                        onTap: () {
                          setState(() {
                            color = Colors.blue;
                          });
                        },
                        child: Container(
                          decoration: const BoxDecoration(
                              color: Colors.blue,
                              borderRadius:
                                  BorderRadius.all(Radius.circular(10))),
                          height: 100,
                          width: 100,
                        ),
                      ),
                    )
                  ],
                ),
              ),
              Padding(
                padding: const EdgeInsets.all(8.0),
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                  children: [
                    Center(
                      child: InkWell(
                        onTap: () {
                          setState(() {
                            color = Colors.red;
                          });
                        },
                        child: Container(
                          decoration: const BoxDecoration(
                              color: Colors.red,
                              borderRadius:
                                  BorderRadius.all(Radius.circular(10))),
                          height: 100,
                          width: 100,
                        ),
                      ),
                    ),
                    Center(
                      child: InkWell(
                        onTap: () {
                          setState(() {
                            color = Colors.green;
                          });
                        },
                        child: Container(
                          decoration: const BoxDecoration(
                              color: Colors.green,
                              borderRadius:
                                  BorderRadius.all(Radius.circular(10))),
                          height: 100,
                          width: 100,
                        ),
                      ),
                    )
                  ],
                ),
              )
            ],
          )
        ],
      ),
    );
  }
}

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如何更改flutter中具有多個(gè)文本按鈕的容器的顏色？

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