flutter_file_manager/lib/Item/Preview/Impl/RealFilePre.dart

import 'dart:io';

import 'package:flutter/cupertino.dart';
import 'package:neofilemanager/Item/Common.dart';
import 'package:neofilemanager/Item/Preview/FilePre.dart';

class RealFilePre extends FilePre {
  Common common;
  FileSystemEntity file;
  String extension;
  double iconHeight = 30.0;
  double iconWidth = 30.0;
  double fileHeight = 50.0;
  double fileWidth = 70.0;

  RealFilePre(
      this.common, this.file, this.extension, this.fileHeight, this.fileWidth);

  Widget build(BuildContext context) {
    print('开始加载'+file.path);
    // 如果是图片类型的文件返回图片,否则返回文件图标
    if (extension == '.png' || extension == '.jpg' || extension == '.jpeg' || extension == '.gif') {
       Image tempImage=Image.file(file, height: fileHeight, width: fileWidth, fit: BoxFit.cover);
    print('加载完毕'+file.path);
      return ClipRRect(
        borderRadius: BorderRadius.circular(10),
        child: tempImage,
      );
    } else {
      return Image.asset( common.selectIcon(extension), height: iconHeight, width: iconWidth,
      );
    }
  }
}