Flutter对话框管理插件flutter_dialog_plugin的使用

Flutter对话框管理插件flutter_dialog_plugin的使用

在本文中，我们将介绍如何使用flutter_dialog_plugin插件来管理Flutter应用中的对话框。此插件主要用于Android平台，目前只完成了Android部分的实现。

示例代码

以下是一个完整的示例代码，展示了如何在Flutter应用中使用flutter_dialog_plugin插件来显示一个原生对话框。

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

import 'package:flutter/services.dart';
import 'package:flutter_dialog_plugin/flutter_dialog_plugin.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  [@override](/user/override)
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _platformVersion = 'Unknown';
  final _flutterDialogPlugin = FlutterDialogPlugin();

  [@override](/user/override)
  void initState() {
    super.initState();
    initPlatformState();
  }

  // 显示原生对话框
  Future<void> showNativeDialog() async {
    try {
      _flutterDialogPlugin.showDialog();
    } on PlatformException {
      if (kDebugMode) {
        print('Platform Exception');
      }
    }
    if (!mounted) return;
  }

  // 初始化平台状态
  Future<void> initPlatformState() async {
    String platformVersion;
    // 平台消息可能失败，所以我们使用try/catch处理PlatformException。
    // 我们还处理了消息可能返回null的情况。
    try {
      platformVersion = await _flutterDialogPlugin.getPlatformVersion() ?? 'Unknown platform version';
    } on PlatformException {
      platformVersion = 'Failed to get platform version.';
    }

    // 如果在异步平台消息还在飞行时，小部件从树中移除，我们应该丢弃回复而不是调用setState来更新我们的不存在的外观。
    if (!mounted) return;

    setState(() {
      _platformVersion = platformVersion;
    });
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('插件示例应用'),
        ),
        body: Center(
          child: Column(
            children: [
              Text('运行于: $_platformVersion\n'),
              MaterialButton(
                onPressed: () => showNativeDialog(),
                child: const Text('显示原生对话框'),
              ),
            ],
          ),
        ),
      ),
    );
  }
}

步骤说明

1. 导入必要的包：

   import 'package:flutter/foundation.dart';
   import 'package:flutter/material.dart';
   import 'dart:async';
   
   import 'package:flutter/services.dart';
   import 'package:flutter_dialog_plugin/flutter_dialog_plugin.dart';
   

2. 初始化状态：

   void main() {
     runApp(const MyApp());
   }
   
   class MyApp extends StatefulWidget {
     const MyApp({super.key});
   
     [@override](/user/override)
     State<MyApp> createState() => _MyAppState();
   }
   

3. 定义状态类：

   class _MyAppState extends State<MyApp> {
     String _platformVersion = 'Unknown';
     final _flutterDialogPlugin = FlutterDialogPlugin();
   

4. 初始化平台状态：

   [@override](/user/override)
   void initState() {
     super.initState();
     initPlatformState();
   }
   
   Future<void> initPlatformState() async {
     String platformVersion;
     try {
       platformVersion = await _flutterDialogPlugin.getPlatformVersion() ?? 'Unknown platform version';
     } on PlatformException {
       platformVersion = 'Failed to get platform version.';
     }
   
     if (!mounted) return;
   
     setState(() {
       _platformVersion = platformVersion;
     });
   }
   

5. 显示原生对话框：

   Future<void> showNativeDialog() async {
     try {
       _flutterDialogPlugin.showDialog();
     } on PlatformException {
       if (kDebugMode) {
         print('Platform Exception');
       }
     }
     if (!mounted) return;
   }
   

6. 构建界面：

   [@override](/user/override)
   Widget build(BuildContext context) {
     return MaterialApp(
       home: Scaffold(
         appBar: AppBar(
           title: const Text('插件示例应用'),
         ),
         body: Center(
           child: Column(
             children: [
               Text('运行于: $_platformVersion\n'),
               MaterialButton(
                 onPressed: () => showNativeDialog(),
                 child: const Text('显示原生对话框'),
               ),
             ],
           ),
         ),
       ),
     );
   }