Flutter核心平台接口插件vital_core_platform_interface的使用

Flutter核心平台接口插件vital_core_platform_interface的使用

vital_core_platform_interface 是一个用于 vital_core 插件的通用平台接口。该接口允许平台特定实现和插件本身确保它们支持相同的接口。

使用示例

下面是一个完整的示例，展示如何在 Flutter 应用中使用 vital_core_platform_interface。

步骤 1: 添加依赖

首先，在你的 pubspec.yaml 文件中添加 vital_core 和 vital_core_platform_interface 依赖：

dependencies:
  flutter:
    sdk: flutter
  vital_core: ^x.x.x  # 请替换为最新版本号

步骤 2: 创建平台接口

创建一个名为 vital_core.dart 的文件，并定义平台接口：

import 'package:vital_core_platform_interface/vital_core_platform_interface.dart';

class VitalCore {
  static VitalCorePlatform get instance => VitalCorePlatform.instance;

  Future<String> getPlatformVersion() {
    return instance.getPlatformVersion();
  }
}

步骤 3: 平台特定实现

对于 Android 平台，创建一个名为 vital_core_android.dart 的文件，并实现平台接口：

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

class VitalCoreAndroid extends VitalCorePlatform {
  static VitalCoreAndroid _instance = VitalCoreAndroid();

  factory VitalCoreAndroid() {
    return _instance;
  }

  [@override](/user/override)
  Future<String> getPlatformVersion() async {
    final version = await MethodChannel('vital_core').invokeMethod<String>('getPlatformVersion');
    return 'Android $version';
  }
}

对于 iOS 平台，创建一个名为 vital_core_ios.dart 的文件，并实现平台接口：

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

class VitalCoreIOS extends VitalCorePlatform {
  static VitalCoreIOS _instance = VitalCoreIOS();

  factory VitalCoreIOS() {
    return _instance;
  }

  [@override](/user/override)
  Future<String> getPlatformVersion() async {
    final version = await MethodChannel('vital_core').invokeMethod<String>('getPlatformVersion');
    return 'iOS $version';
  }
}

步骤 4: 初始化平台接口

在 main.dart 中初始化平台接口，并调用 getPlatformVersion 方法：

import 'package:flutter/material.dart';
import 'package:vital_core/vital_core.dart';

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

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: Text('Vital Core Example')),
        body: Center(child: Text('Loading...')),
      ),
    );
  }
}

class MyHomePage extends StatefulWidget {
  [@override](/user/override)
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  String _platformVersion = 'Unknown';

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

  Future<void> initPlatformState() async {
    String platformVersion;
    try {
      platformVersion = await VitalCore.instance.getPlatformVersion();
    } catch (e) {
      platformVersion = 'Failed to get platform version: $e';
    }

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

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Vital Core Example')),
      body: Center(child: Text('Platform Version: $_platformVersion')),
    );
  }
}