Flutter custom bottom sheet - flutter

Question

I have a ListView where I want to implement a nice way to delete list items using a bottom sheet with actions on. Initially I went down the path of simply calling showBottomSheet() in the onLongPress event handler for my list items, which would successfully open a bottom sheet with my action buttons on. However, this would automatically add a back button to the AppBar which is not what I want.
I then went down the route of trying out animations, such as SlideTransition and AnimatedPositioned:
class FoldersListWidget extends StatefulWidget {
#override
_FoldersListWidgetState createState() => _FoldersListWidgetState();
}
class _FoldersListWidgetState extends State<FoldersListWidget>
with SingleTickerProviderStateMixin {
double _bottomPosition = -70;
#override
Widget build(BuildContext context) {
return Stack(
children: [
FutureBuilder<List<FolderModel>>(
future: Provider.of<FoldersProvider>(context).getFolders(),
builder: (context, snapshot) {
if (!snapshot.hasData) {
return Center(
child: CircularProgressIndicator(),
);
}
return ListView.builder(
itemCount: snapshot.data.length,
itemBuilder: (context, i) {
final folder = snapshot.data[i];
return Card(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(15),
),
margin: EdgeInsets.symmetric(vertical: 5, horizontal: 10),
elevation: 1,
child: ListTile(
title: Text(folder.folderName),
leading: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Container(
width: 50,
child: Consumer<FoldersProvider>(
builder:
(BuildContext context, value, Widget child) {
return value.deleteFolderMode
? CircularCheckBox(
value: false,
onChanged: (value) {},
)
: Icon(
Icons.folder,
color: Theme.of(context).accentColor,
);
},
),
),
],
),
subtitle: folder.numberOfLists != 1
? Text('${folder.numberOfLists} items')
: Text('${folder.numberOfLists} item'),
onTap: () {},
onLongPress: () {
Provider.of<FoldersProvider>(context, listen: false)
.toggleDeleteFolderMode(true); // removes fab from screen
setState(() {
_bottomPosition = 0;
});
},
),
);
},
);
},
),
AnimatedPositioned(
bottom: _bottomPosition,
duration: Duration(milliseconds: 100),
child: ClipRRect(
borderRadius: BorderRadius.only(
topLeft: Radius.circular(25),
topRight: Radius.circular(25),
),
child: Container(
height: 70,
width: MediaQuery.of(context).size.width,
color: Theme.of(context).colorScheme.surface,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
Expanded(
child: IconAboveTextButton(
icon: Icon(Icons.cancel),
text: 'Cancel',
textColour: Colors.black,
opacity: 0.65,
onTap: () => setState(() {
_bottomPosition = -70;
}),
),
),
VerticalDivider(
color: Colors.black26,
),
Expanded(
child: IconAboveTextButton(
icon: Icon(Icons.delete),
text: 'Delete',
textColour: Colors.black,
opacity: 0.65,
),
),
],
),
),
),
),
],
);
}
}
This slides the bottom Container on and off the screen but my issue is that it covers the last list item:
Could anyone suggest a better way of doing this or simply a way to adjust the height of the ListView so that when the Container slides up, the ListView also slides up.

Answer 1

Wrap ListView.builder inside a container and set its bottom padding as (70+16)
70 (height of bottom sheet), 16 (some default padding to make it look better if you like).
return Container(
padding: EdgetInset.ony(bottom: (70+16)),
child:ListView.builder(
itemCount: snapshot.data.length,
itemBuilder: (context, i) {
.....
.....