Each page showing Favorite button and button to be saved locally to reload whenever the app restarted to see the last status page by page - sqlite

Question

I need help for favorite button; is anyone help me for that?
I have pageViews and favorite buttons. Buttons are working but when I favorited one page all others are also favorited.
I recorded all favorite pages to another page and showing as listView. I can delete them as well from listView item by item.
I am fetching json data from API and recording locally to work on. In addition to that, I need to save each page's favorite status locally to reload them whenever the app restarted.
I checked lost of examples, but found too complicated since I am new. I need brief and simple example to study on it.
If you help me for that it would be appreciated.
'''
body: FutureBuilder(
future: ApiProvider().getData(),
builder: (context, snapshot) {
if (!snapshot.hasData) {
return Center(child: const CircularProgressIndicator());
} else {
_itemLength = snapshot.data.length;
_isFavorited = List<int>.generate(_itemLength, (_) => 0);
return PageView.builder(
itemCount: _itemLength,
itemBuilder: (context, index) {
_currentIndex = index;
/// ========= JSON DATA ==========================
final data = snapshot.data[index];
jsonId = data['id'];
quoteId = data[quoteId];
passTitle = data['title'].toString();
return Container(
margin: EdgeInsets.all(20),
child: ListView(
scrollDirection: Axis.vertical,
shrinkWrap: false,
physics: BouncingScrollPhysics(),
children: <Widget>[
CachedNetworkImage(
width: 80,
height: 80,
fit: BoxFit.scaleDown,
imageUrl: data['image_url'].toString(),
placeholder: (context, url) => Center(child:
CircularProgressIndicator()),
errorWidget: (context, url, error) => Icon(Icons.error),
),
Row(
children: [
Expanded(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Container(
padding: const EdgeInsets.only(bottom: 0),
Container(
padding: EdgeInsets.all(0),
child: IconButton(
key: Key('icon_$index'),
padding: EdgeInsets.all(0),
alignment: Alignment.centerRight,
icon: (_isFav ? Icon(Icons.favorite, size:
35) : Icon(Icons.favorite_border, size: 35)),
color: Colors.red[500],
onPressed: () {
print('_isFavorited onPressed :
$_isFavorited');
{
setState(() {
if (_isFav == true) {
_isFav = false;
print('Favorite changed to: Off');
isFavorite = _isFavorited[index] = 0;
setState(() {
dbHelper.deleteQuote(jsonId);
_showSnackBar(context, "Favorite
Quote deleted");
});
} else {
_isFav = true;
debugPrint('Favorite On');
isFavorite = _isFavorited[index] = 1;
var quote = Quote(quoteId, passTitle,
jsonId, isFavorite);
dbHelper.saveQuote(quote);
}
});
}
}
),
),
],
),
),
],
),
SizedBox(height: 10),
Container(child: Text(data['title'], style:
GoogleFonts.satisfy(fontSize: 25, fontWeight:
FontWeight.bold), key: Key('text_$index'))),
],
),
);
},
);
}
},
),
'''