Accessing the database from AsyncTask - NullPointerException on GetDatabaseWritable How to fix?

Question

Android

So, I'm on to the community as always with stupid questions. Excuse me for often resorting to this method of solving my problems, but a cursory search in Google did not give certainty, although the description of this problem is quite common.

There is a class:

public  class  AddTTNActivity  extends  ListActivity  implements  OnGesturePerformedListener

In OnCreate of this class, we initialize our database:

        dbHelper =  new  NewPostDbAdapter ( this ) ;
        dbHelper. open ( ) ;

In the same class, we perform some manipulations with the base, but this is essentially not important ...
Next, we have the AsyncTask class, which exists separately:

public  class  DoBackgroundUpdate  extends  AsyncTask < Cursor,  Integer , Void >

How to access the database from AsyncTask with minimal problems?

P.S. Tried to do something like this:

public  NewPostDbAdapter open ( )  throws  SQLException  {
           try  {
dbHelper  =  new  NewPostDatabaseHelper ( context ) ;
database  =  dbHelper. getWritableDatabase ( ) ;
}
           catch  ( SQLiteException e )  {
close ( ) ;
dbHelper  =  new  NewPostDatabaseHelper ( context ) ;
database  =  dbHelper.getWritableDatabase ( ) ;     
                }
return  this ;
}
 

But the result did not work, I will be grateful for the help!

Answer 1

Problem solved, sorry. :)