tsacdop-podcast-app-android/lib/podcasts/podcastdetail.dart

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'dart:async';
import 'package:fluttertoast/fluttertoast.dart';
import 'package:tsacdop/class/podcastlocal.dart';
import 'package:tsacdop/class/episodebrief.dart';
import 'package:tsacdop/local_storage/sqflite_localpodcast.dart';
import 'package:tsacdop/util/episodegrid.dart';

class PodcastDetail extends StatefulWidget {
  PodcastDetail({Key key, this.podcastLocal}) : super(key: key);
  final PodcastLocal podcastLocal;
  @override
  _PodcastDetailState createState() => _PodcastDetailState();
}

class _PodcastDetailState extends State<PodcastDetail> {
  final GlobalKey<RefreshIndicatorState> _refreshIndicatorKey =
      GlobalKey<RefreshIndicatorState>();

  Future _updateRssItem(PodcastLocal podcastLocal) async {
    var dbHelper = DBHelper();
    final result = await dbHelper.updatePodcastRss(podcastLocal);
    result == 0 ? 
    Fluttertoast.showToast(
      msg: 'No Update',
      gravity: ToastGravity.TOP,
    )
    : Fluttertoast.showToast(
      msg: 'Updated $result Episodes',
      gravity: ToastGravity.TOP,
    );
    if(mounted) setState(() {});
  }

  Future<List<EpisodeBrief>> _getRssItem(PodcastLocal podcastLocal) async {
    print(podcastLocal.id);
    var dbHelper = DBHelper();
    List<EpisodeBrief> episodes = await
        dbHelper.getRssItem(podcastLocal.id);
    return episodes;
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: Text(widget.podcastLocal.title,),
          elevation: 0.0,
          backgroundColor: Colors.grey[100],
          centerTitle: true,
        ),
        body: RefreshIndicator(
            key: _refreshIndicatorKey,
            color: Colors.blue[500],
            onRefresh: () => _updateRssItem(widget.podcastLocal),
            child: FutureBuilder<List<EpisodeBrief>>(
              future: _getRssItem(widget.podcastLocal),
              builder: (context, snapshot) {
                if (snapshot.hasError) print(snapshot.error);
                return (snapshot.hasData)
                    ? EpisodeGrid(podcast: snapshot.data, showDownload: true, showFavorite: true, showNumber: true, heroTag: 'podcast',)
                    : Center(child: CircularProgressIndicator());
              },
            )),
    );
  }
}