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void initState() { |
super.initState(); |
loadData(); |
} |
widget getBody() { |
bool showLoadingDialog = widgets.isEmpty; |
if (showloadingdialog) { |
return getProgressDialog(); |
} else { |
return getListView(); |
} |
} |
widget getProgressDialog() { |
return const center(child: CircularProgressIndicator()); |
} |
@override |
widget build(BuildContext context) { |
return scaffold( |
appBar: AppBar( |
title: const Text('Sample app'), |
), |
body: getBody(), |
); |
} |
ListView getListView() { |
return ListView.builder( |
itemCount: widgets.length, |
itemBuilder: (context, position) { |
return getRow(position); |
}, |
); |
} |
widget getRow(int i) { |
return padding( |
padding: const EdgeInsets.all(10), |
child: Text("Row ${widgets[i]["title"]}"), |
); |
} |
future<void> loadData() async { |
var dataURL = uri.parse('https://jsonplaceholder.typicode.com/posts'); |
http.Response response = await http.get(dataURL); |
setState(() { |
widgets = jsonDecode(response.body); |
}); |
} |
} |
<code_end> |
<topic_end> |