I'm trying to store app data of my flutter application in the database, but the complier keeps showing "Future isn't a type" for async func and underlines in red. I've tried removing .analysis-driver as well, but that doesn't help. How can I fix it ?
Code:
import 'package:sqflite/sqflite.dart';
import 'package:path_provider/path_provider.dart';
import 'package:path/path.dart';
import 'dart:io';
class Db_Help{
static final _db_name="Work_tasks.db";
static final _db_version=1;
static final table="Work Table";
static final task_id="ID";
static final task="Task";
static final bool_check="Value";
static Database _database;
Db_Help._private_cons();
static final Db_Help instance=Db_Help._private_cons();
_initDatabase() async{
Directory docu_dir=await getApplicationDocumentsDirectory();
String path=join(docu_dir.path,_db_name);
return await openDatabase(path, version: _db_version, onCreate: _onCreate);
}
Future<Database> get database async{
if(_database!=null)
return _database;
_database=await _initDatabase();
return _database;
}
Future _onCreate(Database db, int version) async{
await db.execute('''
CREATE TABLE $table (
$task_id INTEGER PRIMARY KEY,
$task TEXT NOT NULL,
$bool_check INTEGER)
''');
}
Future<int> insert(Map<String,dynamic> row) async{
Database db= await instance.database;
return await db.insert(table, row);
}
}
I saw this problem last week. Here is what you can do, moving in that order if not fixed:
Make sure you have the dart:async import
Make sure your project level sdk is set correctly
File -> Project Structure In Project, select valid Project SDK. In Modules -> myapp_android -> Dependencies, select a valid Module SDK.
Update the SDK version in your pubspec.yaml
Flush your cache and restart Android Studio.
File -> Invalidate Caches/Restart and select "Invalidate Caches and Restart"