media_asset_utils 0.0.3

Compress and save image/video native plugin (Swift/Kotlin).

example/lib/main.dart

import 'dart:io';
import 'dart:math';

import 'package:flutter/material.dart';
import 'dart:async';

import 'package:media_asset_utils/media_asset_utils.dart';
import 'package:path_provider/path_provider.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:wechat_assets_picker/wechat_assets_picker.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  File? outputFile;
  File? file;
  int? outputFileSize;
  int? fileSize;

  @override
  void initState() {
    super.initState();
  }

  Future<void> initThumbnail(BuildContext context) async {
    final PermissionStatus status = await Permission.storage.request();
    if (status.isGranted) {
      final List<AssetEntity>? assets = await AssetPicker.pickAssets(context,
          requestType: RequestType.video, maxAssets: 1);
      if ((assets ?? []).isNotEmpty) {
        file = await assets!.first.file;
        setState(() {
          fileSize = file!.lengthSync();
        });
        Directory? directory;
        if (Platform.isIOS) {
          directory = await getApplicationDocumentsDirectory();
        } else {
          directory = await getExternalStorageDirectory();
        }
        outputFile = File(
            '${directory!.path}/thumbnail_${Random().nextInt(100000)}.jpg');
        return;
      } else {
        throw Exception("No files selected");
      }
    }
    throw Exception("Permission denied");
  }

  Future<void> initCompress(BuildContext context, RequestType type) async {
    final PermissionStatus status = await Permission.storage.request();
    if (status.isGranted) {
      final List<AssetEntity>? assets = await AssetPicker.pickAssets(context,
          requestType: type, maxAssets: 1);
      if ((assets ?? []).isNotEmpty) {
        Directory? directory;
        if (Platform.isIOS) {
          directory = await getApplicationDocumentsDirectory();
          file = await assets!.first.originFile;
        } else {
          directory = await getExternalStorageDirectory();
          file = await assets!.first.file;
        }
        setState(() {
          fileSize = file!.lengthSync();
        });
        if (type == RequestType.video) {
          outputFile =
              File('${directory!.path}/video_${Random().nextInt(100000)}.mp4');
        } else {
          outputFile =
              File('${directory!.path}/image_${Random().nextInt(100000)}.jpg');
        }
        return;
      } else {
        throw Exception("No files selected");
      }
    }
    throw Exception("Permission denied");
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Builder(builder: (_) {
          return Column(
            children: [
              Container(
                width: double.infinity,
                height: 200,
                child: Column(
                  children: [
                    Text(
                        '当前选择: $file, 文件大小: ${fileSize != null ? (fileSize! / 1024 / 1024).toStringAsFixed(2) : 0}'),
                    Text(
                        '处理后: $outputFile, 文件大小: ${outputFileSize != null ? (outputFileSize! / 1024 / 1024).toStringAsFixed(2) : 0}'),
                  ],
                ),
              ),
              TextButton(
                onPressed: () async {
                  await initCompress(_, RequestType.video);
                  outputFile = await MediaAssetUtils.compressVideo(file!,
                      saveToLibrary: true,
                      thumbnailConfig: ThumbnailConfig(
                        file: File(
                            '${file!.parent.path}/thumbnail_${Random().nextInt(100000)}.jpg'),
                      ), onVideoCompressProgress: (double progress) {
                    print(progress);
                  });
                  setState(() {
                    outputFileSize = outputFile!.lengthSync();
                  });
                },
                child: Text('Compress Video'),
              ),
              TextButton(
                onPressed: () async {
                  await initThumbnail(_);
                  outputFile = await MediaAssetUtils.getVideoThumbnail(
                    file!,
                    quality: 50,
                    saveToLibrary: true,
                    thumbnailFile: outputFile!,
                  );
                  setState(() {
                    outputFileSize = outputFile!.lengthSync();
                  });
                },
                child: Text('Get Video Thumbnail'),
              ),
              TextButton(
                onPressed: () async {
                  await initCompress(_, RequestType.video);
                  final result = await MediaAssetUtils.getVideoInfo(file!);
                  print(result.toJson());
                },
                child: Text('Get Video Metadata'),
              ),
              TextButton(
                onPressed: () async {
                  await initCompress(_, RequestType.image);
                  outputFile = await MediaAssetUtils.compressImage(
                    file!,
                    saveToLibrary: true,
                  );
                  setState(() {
                    outputFileSize = outputFile!.lengthSync();
                  });
                },
                child: Text('Compress Image'),
              ),
              TextButton(
                onPressed: () async {
                  await initCompress(_, RequestType.image);
                  await MediaAssetUtils.saveToGallery(file!);
                },
                child: Text('Save To Media Store'),
              ),
            ],
          );
        }),
      ),
    );
  }
}