图片列表预览：

///预览图片列表
                List<String> images = [];

                ///添加5个图片
                for (var i = 1; i <= 5; i++) {
                  print(i);
                  images.add(
                      'https://pic.3gbizhi.com/uploadmark/20230428/9e5a68f3912d822995626619d478be49.jpg');
                }

                ///调用预览图片Api
                UniversalMiniProgramApi.uni
                  ..previewImage(PreviewImageOption()
                    ..setValues(
                      urls: images,
                    ));

视频列表预览：

///视频列表
                List<MediaSource> mediaSources = [];

                ///添加视频
                for (var i = 1; i <= 5; i++) {
                  mediaSources.add(MediaSource()
                    ..setValues(
                      url:
                          'https://sample-videos.com/video123/mp4/720/big_buck_bunny_720p_1mb.mp4',
                      type: 'video',
                    ));
                }

                /// 预览视频
                UniversalMiniProgramApi.uni.previewMedia(
                  PreviewMediaOption()..setValues(sources: mediaSources),
                );

视频图片混合预览：

///视频列表
                List<MediaSource> mediaSources = [];

                ///添加视频
                for (var i = 1; i <= 5; i++) {
                  //添加图片
                  if (i == 1 || i == 3) {
                    mediaSources.add(MediaSource()
                      ..setValues(
                        url:
                            'https://pic.3gbizhi.com/uploadmark/20230428/9e5a68f3912d822995626619d478be49.jpg',
                        type: 'image',
                      ));
                    continue;
                  }

                  //添加视频
                  mediaSources.add(MediaSource()
                    ..setValues(
                      url:
                          'https://sample-videos.com/video123/mp4/720/big_buck_bunny_720p_1mb.mp4',
                      type: 'video',
                    ));
                }


                /// 预览图片和视频
                UniversalMiniProgramApi.uni.previewMedia(
                  PreviewMediaOption()..setValues(sources: mediaSources),
                );