fl_assets_picker 4.1.0

fl_assets_picker is used to take photos of the device assets selection and camera and record videos

example/lib/main.dart

import 'dart:io';

import 'package:device_info_plus/device_info_plus.dart';
import 'package:example/src/previewed.dart';
import 'package:extended_image/extended_image.dart';
import 'package:fl_assets_picker/fl_assets_picker.dart';
import 'package:fl_extended/fl_extended.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_image_compress/flutter_image_compress.dart';
import 'package:permission_handler/permission_handler.dart';

const url =
    'https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fc-ssl.duitang.com%2Fuploads%2Fitem%2F201612%2F31%2F20161231205134_uVTex.thumb.400_0.jpeg&refer=http%3A%2F%2Fc-ssl.duitang.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1666931842&t=44493a6c92d1ddda89367519c6206491';

bool get isAndroid => defaultTargetPlatform == TargetPlatform.android;

bool get isIOS => defaultTargetPlatform == TargetPlatform.iOS;

bool get isFuchsia => defaultTargetPlatform == TargetPlatform.fuchsia;

bool get isMobile => isAndroid || isIOS;

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  flAssetsPickerInit();
  runApp(MaterialApp(
      navigatorKey: FlExtended().navigatorKey,
      debugShowCheckedModeBanner: false,
      theme: ThemeData.light(useMaterial3: true),
      darkTheme: ThemeData.dark(useMaterial3: true),
      home: Scaffold(
          appBar: AppBar(title: const Text('Fl Assets Picker')),
          body: const _HomePage())));
}

void flAssetsPickerInit() {
  FlAssetsPicker.assetBuilder = (entity, bool isThumbnail) =>
      AssetBuilder(entity, isThumbnail: isThumbnail);
  FlAssetsPicker.checkPermission = (PickerOptionalActions action) async {
    if (!isMobile) return true;
    if (action == PickerOptionalActions.gallery) {
      if (isIOS) {
        return (await Permission.photos.request()).isGranted;
      } else if (isAndroid) {
        final androidInfo = await DeviceInfoPlugin().androidInfo;
        if (androidInfo.version.sdkInt < 33) {
          return (await Permission.storage.request()).isGranted;
        }
        return (await Permission.photos.request()).isGranted &&
            (await Permission.videos.request()).isGranted;
      }
      return false;
    } else if (action == PickerOptionalActions.camera) {
      final permissionState = await Permission.camera.request();
      return permissionState.isGranted;
    }
    return false;
  };
  FlAssetsPicker.previewModalPopup = (_, Widget widget) => widget.popupDialog();
  FlAssetsPicker.previewBuilder = (context, entity, allEntity) {
    return FlPreviewGesturePageView(
        pageView: ExtendedImageGesturePageView.builder(
            itemCount: allEntity.length,
            controller:
                ExtendedPageController(initialPage: allEntity.indexOf(entity)),
            itemBuilder: (_, int index) =>
                FlAssetsPicker.assetBuilder(allEntity[index], false)));
  };
  FlAssetsPicker.errorCallback = (ErrorDes des) {
    switch (des) {
      case ErrorDes.maxBytes:
        showToast('资源过大');
        break;
      case ErrorDes.maxCount:
        showToast('超过最大数量');
        break;
      case ErrorDes.maxVideoCount:
        showToast('超过最大视频数量');
        break;
      case ErrorDes.none:
        showToast('未获取都资源');
        break;
    }
  };
}

class _HomePage extends StatelessWidget {
  const _HomePage();

  @override
  Widget build(BuildContext context) {
    return Universal(
        padding: const EdgeInsets.all(12),
        isScroll: true,
        children: [
          const Text('单资源选择 混选').marginAll(12),
          buildSingleAssetPicker(RequestType.common),
          const Text('单资源选择 仅图片').marginAll(12),
          buildSingleAssetPicker(RequestType.image),
          const Text('单资源选择 仅视频').marginAll(12),
          buildSingleAssetPicker(RequestType.video),
          const Text('多资源选择 混选').marginAll(12),
          buildMultipleAssetPicker(RequestType.common),
          const Text('多资源选择 仅图片').marginAll(12),
          buildMultipleAssetPicker(RequestType.image),
          const Text('多资源选择 仅视频').marginAll(12),
          buildMultipleAssetPicker(RequestType.video),
        ]);
  }

  Widget buildSingleAssetPicker(RequestType requestType) {
    final actions = [
      PickerActions(
          action: PickerOptionalActions.gallery,
          requestType: requestType,
          text: const Text('图库选择')),
      PickerActions(
          action: PickerOptionalActions.camera,
          requestType: requestType,
          text: const Text('相机拍摄')),
      const PickerActions(
          action: PickerOptionalActions.cancel, text: Text('取消'))
    ];
    return Row(mainAxisAlignment: MainAxisAlignment.spaceAround, children: [
      SingleAssetPicker(
          actions: actions,
          renovate: (AssetEntity entity) async {
            final file = await entity.file;
            if (file != null) return await compressImage(file);
            return null;
          },
          initialData: SingleAssetPicker.convertUrl(url),
          itemConfig: AssetsPickerItemConfig(
              borderRadius: BorderRadius.circular(10),
              color: Colors.amberAccent),
          onChanged: (ExtendedAssetEntity value) {
            'onChanged ${value.realValueStr}  realValue Type: ${value.realValue.runtimeType}'
                .log();
          }),
      SingleAssetPicker(
          actions: actions,
          initialData: SingleAssetPicker.convertUrl(url),
          itemConfig: AssetsPickerItemConfig(
              borderRadius: BorderRadius.circular(40),
              color: Colors.amberAccent),
          onChanged: (ExtendedAssetEntity value) {
            'onChanged ${value.realValueStr}  realValue Type: ${value.realValue.runtimeType}'
                .log();
          }),
    ]);
  }

  Widget buildMultipleAssetPicker(RequestType requestType) =>
      MultipleAssetPicker(
          initialData: MultipleAssetPicker.convertUrls(url),
          maxVideoCount: 6,
          actions: [
            PickerActions(
                action: PickerOptionalActions.gallery,
                text: const Text('图库选择'),
                requestType: requestType),
            PickerActions(
                action: PickerOptionalActions.camera,
                text: const Text('相机拍摄'),
                requestType: requestType),
            const PickerActions(
                action: PickerOptionalActions.cancel, text: Text('取消')),
          ],
          itemConfig: AssetsPickerItemConfig(
              delete: const DefaultDeleteIcon(backgroundColor: Colors.blue),
              deletionConfirmation: (_) async {
                final value = await CupertinoAlertDialog(
                    content: Container(
                        padding: const EdgeInsets.symmetric(vertical: 10),
                        constraints: const BoxConstraints(maxHeight: 100),
                        child: const Text('确定要删除么')),
                    actions: [
                      Universal(
                          height: 45,
                          alignment: Alignment.center,
                          onTap: () {
                            pop(false);
                          },
                          child: const BText('取消',
                              fontSize: 14, color: Colors.grey)),
                      Universal(
                          height: 45,
                          alignment: Alignment.center,
                          onTap: () {
                            pop(true);
                          },
                          child: const BText('确定',
                              fontSize: 14, color: Colors.grey)),
                    ]).popupCupertinoModal<bool?>();
                return value ?? false;
              }),
          onChanged: (List<ExtendedAssetEntity> value) {
            'onChanged ${value.builder((item) => item.realValueStr)}'.log();
          });
}

/// 图片压缩
Future<Uint8List?> compressImage(File file) async {
  final fileName = file.path.removePrefix(file.parent.path);
  final suffix = fileName.split('.').last.toLowerCase();
  CompressFormat? format;
  if (suffix == 'jpg' || suffix == 'jpeg') {
    format = CompressFormat.jpeg;
  } else if (suffix == 'png') {
    format = CompressFormat.png;
  } else if (suffix == 'webp') {
    format = CompressFormat.webp;
  } else if (suffix == 'heic') {
    format = CompressFormat.heic;
  }
  if (format != null) {
    return await FlutterImageCompress.compressWithFile(file.path,
        format: format, minWidth: 480, minHeight: 480, quality: 80);
  }
  return null;
}