【Flutter】图片压缩flutter_image_compress
import 'dart:io';
import 'dart:typed_data';
import 'package:flutter_image_compress/flutter_image_compress.dart';
import 'package:path_provider/path_provider.dart' as path_provider;
class ImageCompressUtil {
/// 图片压缩 File -> File
Future<File> imageCompressAndGetFile(File file) async {
if (file.lengthSync() < 200 * 1024) {
return file;
}
var quality = 100;
if (file.lengthSync() > 4 * 1024 * 1024) {
quality = 50;
} else if (file.lengthSync() > 2 * 1024 * 1024) {
quality = 60;
} else if (file.lengthSync() > 1 * 1024 * 1024) {
quality = 70;
} else if (file.lengthSync() > 0.5 * 1024 * 1024) {
quality = 80;
} else if (file.lengthSync() > 0.25 * 1024 * 1024) {
quality = 90;
}
var dir = await path_provider.getTemporaryDirectory();
var targetPath = dir.absolute.path +"/"+DateTime.now().millisecondsSinceEpoch.toString()+ ".jpg";
var result = await FlutterImageCompress.compressAndGetFile(
file.absolute.path,
targetPath,
minWidth: 600,
quality: quality,
rotate: 0,
);
print("压缩后：${() / 1024}");
print("压缩后：${() / 1024}");
return result;
}
/// 图片压缩 File -> Uint8List
Future<Uint8List> imageCompressFile(File file) async {
var result = await FlutterImageCompress.compressWithFile(
file.absolute.path,
minWidth: 2300,
minHeight: 1500,
quality: 94,
rotate: 90,
);
print(file.lengthSync());
print(result.length);
return result;
}
/// 图片压缩 Asset -> Uint8List
Future<Uint8List> imageCompressAsset(String assetName) async {
var list = await FlutterImageCompress.compressAssetImage(
assetName,
minHeight: 1920,
minWidth: 1080,
quality: 96,
rotate: 180,
);
return list;
}
/// 图片压缩 Uint8List -> Uint8List
Future<Uint8List> testComporessList(Uint8List list) async {
var result = await FlutterImageCompress.compressWithList(
list,
minHeight: 1920,
minWidth: 1080,
quality: 96,
rotate: 135,
);
print(list.length);
print(result.length);
return result;
}
}