112 lines
3.4 KiB
Dart
112 lines
3.4 KiB
Dart
import 'dart:convert';
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import 'dart:typed_data';
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import 'package:flutter/services.dart' show rootBundle;
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import 'package:flutter_local_notifications/flutter_local_notifications.dart';
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import 'package:http/http.dart' as http;
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class NotificationService {
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factory NotificationService() {
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return _instance;
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}
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NotificationService._internal();
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static final NotificationService _instance = NotificationService._internal();
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final FlutterLocalNotificationsPlugin _flutterLocalNotificationsPlugin =
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FlutterLocalNotificationsPlugin();
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void init() {
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const AndroidInitializationSettings initializationSettingsAndroid =
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AndroidInitializationSettings('@mipmap/ic_launcher');
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const InitializationSettings initializationSettings =
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InitializationSettings(android: initializationSettingsAndroid);
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_flutterLocalNotificationsPlugin.initialize(initializationSettings);
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}
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/// **📌 方法1：显示普通文本通知**
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Future<void> showTextNotification(String title, String body) async {
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const AndroidNotificationDetails androidPlatformChannelSpecifics =
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AndroidNotificationDetails(
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'1',
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'flutter_channel',
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importance: Importance.max,
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priority: Priority.high,
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);
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const NotificationDetails platformChannelSpecifics =
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NotificationDetails(android: androidPlatformChannelSpecifics);
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await _flutterLocalNotificationsPlugin.show(
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1,
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title,
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body,
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platformChannelSpecifics,
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);
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}
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/// **📌 方法2：显示带图片的推送通知**
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Future<void> showImageNotification(
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String title, String body, String imageUrl) async {
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// //读取网络下载图片
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// final ByteArrayAndroidBitmap? bigPicture = await _downloadImage(imageUrl);
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// 读取本地图片
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final ByteData imageData = await rootBundle.load('images/call_me_icon.png');
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final Uint8List imageBytes = imageData.buffer.asUint8List();
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final ByteArrayAndroidBitmap bigPicture =
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ByteArrayAndroidBitmap(imageBytes);
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if (bigPicture == null) {
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showTextNotification(title, body);
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return;
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}
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final BigPictureStyleInformation bigPictureStyleInformation =
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BigPictureStyleInformation(
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bigPicture,
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contentTitle: title,
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summaryText: body,
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);
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final AndroidNotificationDetails androidPlatformChannelSpecifics =
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AndroidNotificationDetails(
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'1',
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'flutter_channel',
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importance: Importance.max,
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priority: Priority.high,
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styleInformation: bigPictureStyleInformation,
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sound: const RawResourceAndroidNotificationSound('ring_wx'), // 自定义铃声
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);
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final NotificationDetails platformChannelSpecifics =
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NotificationDetails(android: androidPlatformChannelSpecifics);
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await _flutterLocalNotificationsPlugin.show(
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1,
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title,
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body,
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platformChannelSpecifics,
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);
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}
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/// **📌 辅助方法：下载网络图片**
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Future<ByteArrayAndroidBitmap?> _downloadImage(String url) async {
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try {
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final http.Response response = await http.get(Uri.parse(url));
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if (response.statusCode == 200) {
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return ByteArrayAndroidBitmap.fromBase64String(
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base64Encode(response.bodyBytes));
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}
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} catch (e) {
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print('❌ 图片下载失败: $e');
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}
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return null;
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}
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/// 取消所有本地通知
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Future<void> cancelAllNotifications() async {
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await _flutterLocalNotificationsPlugin.cancelAll();
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}
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}
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