Breaking News: Grepper is joining You.com. Read the official announcement!

how to preload pageviews data fluter

Drab Dunlin answered on November 26, 2020 Popularity 7/10 Helpfulness 2/10

answer how to preload pageviews data fluter

how to preload pageviews data fluter

Comment

PageController _controller;
ZoomableImage currPage, nextPage;

Future<List<CachedNetworkImageProvider>> _loadAllImages(Book book) async {
  List<CachedNetworkImageProvider> cachedImages = [];
  for(int i=0;i<book.numPages;i++) {
    var configuration = createLocalImageConfiguration(context);
    cachedImages.add(new CachedNetworkImageProvider("https://example.com/${bookId}/${index+1}.jpg}")..resolve(configuration));
  }
  return cachedImages;
}

FutureBuilder<List<CachedNetworkImageProvider>> _futurePages(Book book) {
  return new FutureBuilder(
    future: _loadAllImages(book),
    builder: (BuildContext context, AsyncSnapshot snapshot){
      if(snapshot.hasData) {
        return new Container(
          child: PageView.builder(
            physics: new AlwaysScrollableScrollPhysics(),
            controller: _controller,
            itemCount: snapshot.data.length,
            itemBuilder: (BuildContext context, int index) {
              ImageProvider image = snapshot.data[index];
              return new ZoomableImage(
                image, 
                placeholder: new Center(
                  child: CupertinoActivityIndicator(),
                ),
              );
            },
            onPageChanged: (int index) {},
          ),
        );
      } else if(!snapshot.hasData) return new Center(child: CupertinoActivityIndicator());
    },
  );
}

@override
Widget build(BuildContext context) {
  return new Scaffold(
    body: _futurePages(widget.book),
  );
}

Popularity 7/10 Helpfulness 2/10 Language whatever

Source: stackoverflow.com

Tags: pageviews preload whatever

Link to this answer
Share Copy Link

Contributed on Nov 26 2020

Drab Dunlin

0 Answers Avg Quality 2/10

how to preload pageviews data fluter

Contents

More Related Answers

how to preload pageviews data fluter

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.