Clean/lib/utils/file_size_calculator_util.dart

import 'package:flutter/cupertino.dart';
import 'package:wechat_assets_picker/wechat_assets_picker.dart';
import 'package:photo_manager/photo_manager.dart';

class FileSizeCalculatorUtil {
  static final Map<String, double> fileSizeCache = {};

  /// 获取文件大小
  static Future<double> getFileSize(String assetId) async {
    if (fileSizeCache.containsKey(assetId)) {

      return fileSizeCache[assetId]!;
    }

    final entity = await AssetEntity.fromId(assetId);
    if (entity == null) return 0;

    final file = await entity.file;
    if (file == null) return 0;


    double size = (await file.length()) / 1024;

    if ( await file.exists()) {
      try {
        await file.delete();
      } catch (e) {
        debugPrint("Delete file error: $e");
      }
    } else {
      debugPrint("File not exists: ${file.path}");
    }

    if (size <= 0) {
      return 0;
    }
    fileSizeCache[assetId] = size;
    return size;
  }
}