通知中心封面图显示

部分界面的信息更新
缓存系统初步引入
即将进入播放列表更新

lib/utils/artwork_helper.dart

@@ -2,11 +2,11 @@
 import 'dart:io';
 import 'dart:typed_data';
 import 'package:path_provider/path_provider.dart';
+import 'package:flutter/foundation.dart';
 
 class ArtworkHelper {
   static const String _artworkDir = 'artworks';
 
-  /// 保存封面图到本地
   static Future<String?> saveArtwork(Uint8List data, String songKey) async {
     try {
       final dir = await getApplicationDocumentsDirectory();
@@ -24,7 +24,6 @@ class ArtworkHelper {
     }
   }
 
-  /// 获取封面图文件
   static Future<File?> getArtwork(String songKey) async {
     try {
       final dir = await getApplicationDocumentsDirectory();
@@ -39,7 +38,6 @@ class ArtworkHelper {
     }
   }
 
-  /// 删除封面图
   static Future<void> deleteArtwork(String songKey) async {
     try {
       final dir = await getApplicationDocumentsDirectory();
@@ -47,6 +45,7 @@ class ArtworkHelper {
       final file = File(path);
       if (await file.exists()) {
         await file.delete();
+        debugPrint('🗑️ [ArtworkHelper] deleted artwork: $songKey');
       }
     } catch (e) {
       // ignore

lib/utils/file_provider_utils.dart

@@ -0,0 +1,55 @@
+// lib/utils/file_provider_utils.dart
+import 'dart:io';
+import 'package:flutter/services.dart';
+import 'package:flutter/foundation.dart';
+
+class FileProviderUtils {
+  static const MethodChannel _channel =
+      MethodChannel('com.lxh.qingting_player/file_provider');
+
+  /// 生成 content:// URI（Android only）
+  static Future<Uri?> getContentUri(File file) async {
+    if (!Platform.isAndroid) {
+      // 非 Android 平台直接返回 file:// URI
+      return Uri.file(file.path);
+    }
+
+    try {
+      final uriString = await _channel.invokeMethod('getContentUri', {
+        'path': file.path,
+      });
+      if (uriString is String && uriString.isNotEmpty) {
+        return Uri.parse(uriString);
+      }
+      return Uri.file(file.path);
+    } on PlatformException catch (e) {
+      debugPrint('⚠️ [FileProviderUtils] PlatformException: ${e.message}');
+      return Uri.file(file.path);
+    } catch (e) {
+      debugPrint('⚠️ [FileProviderUtils] Error: $e');
+      return Uri.file(file.path);
+    }
+  }
+
+  /// 检查文件是否存在
+  static Future<bool> fileExists(String path) async {
+    try {
+      final file = File(path);
+      return await file.exists();
+    } catch (e) {
+      return false;
+    }
+  }
+
+  /// 删除文件
+  static Future<void> deleteFile(String path) async {
+    try {
+      final file = File(path);
+      if (await file.exists()) {
+        await file.delete();
+      }
+    } catch (e) {
+      // ignore
+    }
+  }
+}