42 lines
1.2 KiB
Dart
42 lines
1.2 KiB
Dart
import 'dart:developer';
|
||
import 'dart:io';
|
||
import 'package:path_provider/path_provider.dart';
|
||
import 'package:http/http.dart' as http;
|
||
|
||
class NotifyImageCache {
|
||
/// ✅ 根据 URL 生成缓存文件名（模仿你的 _getFileNameFromUrl）
|
||
static String _fileNameFromUrl(String url) {
|
||
try {
|
||
Uri uri = Uri.parse(url);
|
||
if (uri.pathSegments.isNotEmpty) {
|
||
return uri.pathSegments.last;
|
||
}
|
||
} catch (_) {}
|
||
return '${url.hashCode}.jpg';
|
||
}
|
||
|
||
/// ✅ 获取本地缓存路径（如果不存在则下载）
|
||
static Future<String?> getCachedImage(String url) async {
|
||
try {
|
||
final dir = await getTemporaryDirectory();
|
||
final fileName = _fileNameFromUrl(url);
|
||
final filePath = '${dir.path}/libCachedImageData/$fileName';
|
||
log(filePath);
|
||
final file = File(filePath);
|
||
|
||
// ✅ 已缓存：直接返回
|
||
if (await file.exists()) return file.path;
|
||
|
||
// ✅ 没缓存：下载
|
||
final resp = await http.get(Uri.parse(url));
|
||
if (resp.statusCode == 200) {
|
||
await file.writeAsBytes(resp.bodyBytes);
|
||
return file.path;
|
||
}
|
||
} catch (e) {
|
||
print('缓存图片出错: $e');
|
||
}
|
||
return null;
|
||
}
|
||
}
|