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
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@@ -1,11 +1,15 @@
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// lib/services/audio_player_handler.dart
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import 'dart:io'; // ⭐ 添加
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import 'dart:typed_data'; // ⭐ 添加
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import 'dart:io';
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import 'dart:typed_data';
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import 'package:flutter/foundation.dart';
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import 'package:path_provider/path_provider.dart';
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import 'package:audio_service/audio_service.dart' as audio_service;
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import '../audio/player_controller.dart';
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import '../audio/playback_state_manager.dart';
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import '../services/audio_service.dart';
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import '../utils/file_provider_utils.dart';
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import 'dart:convert';
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import 'package:crypto/crypto.dart';
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class AudioPlayerHandler extends audio_service.BaseAudioHandler {
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final PlayerController _player = PlayerController();
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@@ -15,18 +19,19 @@ class AudioPlayerHandler extends audio_service.BaseAudioHandler {
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String? _currentTitle;
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String? _currentArtist;
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// ⭐ 唯一的位置变量
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Duration _currentPosition = Duration.zero;
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DateTime _lastPublishTime = DateTime.now();
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static const Duration _publishInterval = Duration(milliseconds: 500);
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// ⭐ 缓存 artwork 文件路径，避免重复写入
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String? _currentArtworkPath;
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AudioPlayerHandler() {
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_player.playingStream.listen((playing) {
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_state.updatePlaying(playing);
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_publishState();
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});
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// ⭐ 位置更新：直接赋值给 _currentPosition
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_player.positionStream.listen((position) {
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_currentPosition = position;
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_state.updatePosition(position);
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@@ -34,7 +39,7 @@ class AudioPlayerHandler extends audio_service.BaseAudioHandler {
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final now = DateTime.now();
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if (now.difference(_lastPublishTime) >= _publishInterval) {
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_lastPublishTime = now;
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_updateMediaItemPosition(position);
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// ⭐ 只保留 _publishStateOnly()
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_publishStateOnly();
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}
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});
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@@ -54,6 +59,7 @@ class AudioPlayerHandler extends audio_service.BaseAudioHandler {
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});
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}
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// ---- 发布状态 ----
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void _publishState() {
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final state = _state.playbackState;
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playbackState.add(audio_service.PlaybackState(
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@@ -71,31 +77,112 @@ class AudioPlayerHandler extends audio_service.BaseAudioHandler {
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void _publishStateOnly() {
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final current = playbackState.value;
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debugPrint(
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'📡 [publishStateOnly] position=$_currentPosition, playing=${current.playing}',
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);
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'📡 [publishStateOnly] position=$_currentPosition, playing=${current.playing}');
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playbackState.add(
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audio_service.PlaybackState(
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controls: current.controls.isNotEmpty
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? current.controls
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: _state.playbackState.controls,
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processingState: _state.playbackState.processingState,
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playing: current.playing,
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androidCompactActionIndices: current.androidCompactActionIndices,
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// ⭐ 声明支持 seek
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systemActions: const {
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audio_service.MediaAction.seek,
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},
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updatePosition: _currentPosition,
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updateTime: DateTime.now(),
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),
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);
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playbackState.add(audio_service.PlaybackState(
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controls: current.controls.isNotEmpty
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? current.controls
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: _state.playbackState.controls,
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processingState: _state.playbackState.processingState,
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playing: current.playing,
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androidCompactActionIndices: current.androidCompactActionIndices,
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updatePosition: _currentPosition,
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updateTime: DateTime.now(),
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systemActions: const {
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audio_service.MediaAction.seek,
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},
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));
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}
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// ---- 更新媒体信息 ----
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void _updateMediaItem({
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required String id,
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required String title,
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required String artist,
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Duration? duration,
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Uint8List? artwork,
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}) {
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debugPrint(
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'📢 [handler] _updateMediaItem: artwork is ${artwork != null ? 'not null (${artwork.length} bytes)' : 'null'}');
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_currentId = id;
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_currentTitle = title;
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_currentArtist = artist;
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final position = _player.position;
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debugPrint('📢 [handler] updateMediaItem: $title - $artist');
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// ⭐ 异步处理 artwork（不阻塞主流程）
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_handleArtwork(id, artwork).then((artUri) {
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// 如果 artUri 变化，重新推送 MediaItem
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final current = mediaItem.value;
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if (current != null && current.artUri != artUri) {
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debugPrint('📢 [handler] updating artUri: $artUri');
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mediaItem.add(audio_service.MediaItem(
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id: current.id,
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title: current.title,
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artist: current.artist,
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duration: current.duration,
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artUri: artUri,
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extras: current.extras,
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));
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}
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});
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// 先推送不带封面图的 MediaItem（让 UI 尽快显示）
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mediaItem.add(audio_service.MediaItem(
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id: id,
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title: title,
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artist: artist,
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duration: duration ?? _player.duration,
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extras: {'position': position.inMilliseconds},
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));
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}
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/// 处理封面图：保存到本地并生成 content URI
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Future<Uri?> _handleArtwork(String id, Uint8List? artwork) async {
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if (artwork == null || artwork.isEmpty) {
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_currentArtworkPath = null;
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return null;
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}
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try {
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final dir = await getApplicationDocumentsDirectory();
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final artworkDir = Directory('${dir.path}/artworks');
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if (!await artworkDir.exists()) {
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await artworkDir.create(recursive: true);
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}
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// 使用 md5 生成安全的文件名
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final bytes = utf8.encode(id);
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final digest = md5.convert(bytes);
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final fileName = '$digest.jpg';
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final path = '${artworkDir.path}/$fileName';
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final file = File(path);
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// 检查文件是否已存在
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if (await file.exists()) {
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final existingBytes = await file.readAsBytes();
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if (existingBytes.length == artwork.length &&
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existingBytes.hashCode == artwork.hashCode) {
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_currentArtworkPath = path;
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return await FileProviderUtils.getContentUri(file);
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}
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}
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// 写入新文件
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await file.writeAsBytes(artwork);
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_currentArtworkPath = path;
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debugPrint('📢 [handler] artwork saved: $path');
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return await FileProviderUtils.getContentUri(file);
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} catch (e) {
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debugPrint('⚠️ [handler] artwork handling failed: $e');
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return null;
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}
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}
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// ---- 外部接口 ----
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void updateNotification({
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required String id,
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required String title,
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@@ -108,66 +195,10 @@ class AudioPlayerHandler extends audio_service.BaseAudioHandler {
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artist: artist,
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artwork: artwork,
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);
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_publishState();
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}
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void _updateMediaItem({
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required String id,
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required String title,
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required String artist,
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Duration? duration,
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Uint8List? artwork,
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}) {
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_currentId = id;
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_currentTitle = title;
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_currentArtist = artist;
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final position = _player.position;
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debugPrint('📢 [handler] updateMediaItem: $title - $artist');
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// ⭐ 如果有 artwork，保存为临时文件并设置 artUri
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Uri? artUri;
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if (artwork != null && artwork.isNotEmpty) {
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try {
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final tempDir = Directory.systemTemp;
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final artPath = '${tempDir.path}/art_${id.hashCode}.jpg';
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final artFile = File(artPath);
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artFile.writeAsBytesSync(artwork);
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artUri = Uri.file(artPath);
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debugPrint('📢 [handler] artwork saved: $artPath');
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} catch (e) {
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debugPrint('⚠️ [handler] save artwork failed: $e');
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}
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}
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mediaItem.add(audio_service.MediaItem(
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id: id,
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title: title,
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artist: artist,
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duration: duration ?? _player.duration,
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artUri: artUri,
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extras: {
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'position': position.inMilliseconds,
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},
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));
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}
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void _updateMediaItemPosition(Duration position) {
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final currentMediaItem = mediaItem.value;
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if (currentMediaItem != null) {
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mediaItem.add(audio_service.MediaItem(
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id: currentMediaItem.id,
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title: currentMediaItem.title,
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artist: currentMediaItem.artist,
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duration: currentMediaItem.duration,
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artUri: currentMediaItem.artUri,
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extras: {
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'position': position.inMilliseconds,
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...?currentMediaItem.extras,
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},
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));
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}
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}
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// ---- 控制命令 ----
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@override
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Future<void> play() async {
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debugPrint('▶️ [handler] play() called');
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@@ -194,7 +225,6 @@ class AudioPlayerHandler extends audio_service.BaseAudioHandler {
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debugPrint('⏩ [handler] seek() called: $position');
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await _player.seek(position);
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_currentPosition = position;
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_updateMediaItemPosition(position);
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_publishStateOnly();
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}
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