引入部分缓存机制

引入封面图信息

正在进入测试阶段

lib/services/audio_player_handler.dart

@@ -1,5 +1,6 @@
 // lib/services/audio_player_handler.dart
-
+import 'dart:io'; // ⭐ 添加
+import 'dart:typed_data'; // ⭐ 添加
 import 'package:flutter/foundation.dart';
 import 'package:audio_service/audio_service.dart' as audio_service;
 import '../audio/player_controller.dart';
@@ -53,22 +54,6 @@ class AudioPlayerHandler extends audio_service.BaseAudioHandler {
     });
   }
 
-  void _updateMediaItemPosition(Duration position) {
-    final currentMediaItem = mediaItem.value;
-    if (currentMediaItem != null) {
-      mediaItem.add(audio_service.MediaItem(
-        id: currentMediaItem.id,
-        title: currentMediaItem.title,
-        artist: currentMediaItem.artist,
-        duration: currentMediaItem.duration,
-        extras: {
-          'position': position.inMilliseconds,
-          ...?currentMediaItem.extras,
-        },
-      ));
-    }
-  }
-
   void _publishState() {
     final state = _state.playbackState;
     playbackState.add(audio_service.PlaybackState(
@@ -111,38 +96,76 @@ class AudioPlayerHandler extends audio_service.BaseAudioHandler {
     );
   }
 
+  void updateNotification({
+    required String id,
+    required String title,
+    required String artist,
+    Uint8List? artwork,
+  }) {
+    _updateMediaItem(
+      id: id,
+      title: title,
+      artist: artist,
+      artwork: artwork,
+    );
+  }
+
   void _updateMediaItem({
     required String id,
     required String title,
     required String artist,
     Duration? duration,
+    Uint8List? artwork,
   }) {
     _currentId = id;
     _currentTitle = title;
     _currentArtist = artist;
     final position = _player.position;
 
-    debugPrint(
-        '📢 [handler] updateMediaItem: $title - $artist (position=${position.inSeconds}s)');
+    debugPrint('📢 [handler] updateMediaItem: $title - $artist');
+
+    // ⭐ 如果有 artwork，保存为临时文件并设置 artUri
+    Uri? artUri;
+    if (artwork != null && artwork.isNotEmpty) {
+      try {
+        final tempDir = Directory.systemTemp;
+        final artPath = '${tempDir.path}/art_${id.hashCode}.jpg';
+        final artFile = File(artPath);
+        artFile.writeAsBytesSync(artwork);
+        artUri = Uri.file(artPath);
+        debugPrint('📢 [handler] artwork saved: $artPath');
+      } catch (e) {
+        debugPrint('⚠️ [handler] save artwork failed: $e');
+      }
+    }
 
     mediaItem.add(audio_service.MediaItem(
       id: id,
       title: title,
       artist: artist,
       duration: duration ?? _player.duration,
+      artUri: artUri,
       extras: {
         'position': position.inMilliseconds,
       },
     ));
   }
 
-  void updateNotification({
-    required String id,
-    required String title,
-    required String artist,
-  }) {
-    _updateMediaItem(id: id, title: title, artist: artist);
-    _publishState();
+  void _updateMediaItemPosition(Duration position) {
+    final currentMediaItem = mediaItem.value;
+    if (currentMediaItem != null) {
+      mediaItem.add(audio_service.MediaItem(
+        id: currentMediaItem.id,
+        title: currentMediaItem.title,
+        artist: currentMediaItem.artist,
+        duration: currentMediaItem.duration,
+        artUri: currentMediaItem.artUri,
+        extras: {
+          'position': position.inMilliseconds,
+          ...?currentMediaItem.extras,
+        },
+      ));
+    }
   }
 
   @override

lib/services/audio_service.dart

@@ -4,6 +4,7 @@ import 'package:flutter/material.dart';
 import 'package:media_kit/media_kit.dart';
 import 'playback_service.dart';
 import '../metadata/metadata_service.dart';
+import 'dart:typed_data';
 
 enum PlayMode {
   sequential,
@@ -16,12 +17,14 @@ class Song {
   final String title;
   final String artist;
   final String? url;
+  final Uint8List? artwork;
 
   Song({
     required this.id,
     required this.title,
     required this.artist,
     this.url,
+    this.artwork,
   });
 }
 
@@ -181,6 +184,8 @@ class AudioService extends ChangeNotifier {
           title: metadata.title.isNotEmpty ? metadata.title : song.title,
           artist: metadata.artist.isNotEmpty ? metadata.artist : song.artist,
           url: song.url,
+          artwork: metadata.artwork,
+          // ⭐ 如果需要传递 artwork，可以在这里添加字段
         );
         _queue[_currentIndex] = updatedSong;
         _currentSong = updatedSong;