Flutter 动态更改应用程序启动图标

前言

在这篇文章中，我们将讨论如何在运行时在我们的 flutter 应用程序中动态更改多个应用程序启动器图标。

依赖包

一个用于动态更改移动平台上应用程序图标 flutter 插件。

正文

实施

考虑到我们已经准备好了基本的 UI (包含图像和提升的按钮 widget )。

import 'package:flutter/material.dart';

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.title}) : super(key: key);

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int iconIndex = 0;

  List iconName = <String>['icon1', 'icon2', 'icon3'];
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: buildAppBar(appBarTitle: widget.title),
      body: Padding(
          padding: EdgeInsets.all(kSpacing),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              buildIconTile(0, 'red'),
              buildIconTile(1, 'dark'),
              buildIconTile(2, 'blue'),
              HeightSpacer(myHeight: kSpacing),
              PrimaryBtn(
                  btnFun: () => changeAppIcon(), btnText: 'Set as app icon'),
            ],
          )),
    );
  }

  Widget buildIconTile(int index, String themeTxt) => Padding(
        padding: EdgeInsets.all(kSpacing / 2),
        child: GestureDetector(
          onTap: () => setState(() => iconIndex = index),
          child: ListTile(
              contentPadding: const EdgeInsets.only(left: 0.0, right: 0.0),
              leading: Image.asset(
                imagefiles[index],
                width: 45,
                height: 45,
              ),
              title: Text(themeTxt, style: const TextStyle(fontSize: 25)),
              trailing: iconIndex == index
                  ? const Icon(
                      Icons.check_circle_rounded,
                      color: Colors.green,
                      size: 30,
                    )
                  : Icon(
                      Icons.circle_outlined,
                      color: Colors.grey.withOpacity(0.5),
                      size: 30,
                    )),
        ),
      );

  changeAppIcon()  {}

onpress 事件

现在我们需要在提升按钮 widget 的 onpress 事件[ changeAppIcon {}]中编写更改应用程序启动器图标的逻辑。

  changeAppIcon() async {
    try {
      if (await FlutterDynamicIcon.supportsAlternateIcons) {
        await FlutterDynamicIcon.setAlternateIconName(iconName[iconIndex]);
        debugPrint("App icon change successful");
        return;
      }
    } catch (e) {
      debugPrint("Exception: ${e.toString()}");
    }
    debugPrint("Failed to change app icon ");
  }