Too many positional argument on ListView
111
It seems you put the ListView.Builder()
and GestureDetector()
into Column()
widget incorrectly.
Here is a correct sample:
Column(
children:[
ListView.Builder(),
GestureDetector(),
],
)
When adding values for Column()
and Row()
you will need to add it into the children:
property.
Author by
Kyuhan Nam
Updated on December 19, 2022Comments
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Kyuhan Nam over 1 year
I'm writing the test code of the ListView. Though I specified the name of parameters explicitly, I got the error message, 'Too many positional arguments: 0 expected, but 2 found'. Any suggestion to solve this?
Thanks in advance.
@override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: const Text('File Example'), ), body: Center( child: Column( ListView.builder( itemCount: (this.ideaCount == null) ? 0 : this.ideaCount, itemBuilder: (BuildContext context, int position) { return Card( color: Colors.white, elevation: 2.0, child: ListTile( title: Text(ideaList[position].name), subtitle: Text(ideaList[position].memo), ) ); }), GestureDetector( onLongPress: () async { print("Long Press"); result = await record.hasPermission(); if (result) { var dir = await getApplicationDocumentsDirectory(); print("############"); print(dir.path); DateTime now = DateTime.now(); recordDate = '$now'; await record.start( path: dir.path + recordDate! + '.aac', encoder: AudioEncoder.AAC, bitRate: 128000, samplingRate: 44100, ); } else { print('##########Not Allowed!!!!!'); } }, onLongPressUp: () async { print("Long Press Stop"); record.stop(); Idea idea = Idea(1, recordDate!, 'test'); helper.insertIdea(idea); setState(() { showData(); }); }, child: ElevatedButton( onPressed: () {}, child: Icon(Icons.mic)))))); }
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Kyuhan Nam about 2 yearsOh... I see. It was not ListView issue, but Column issue. I'll try that. Thank you very much!