Question

Consider this Method in a DatabaseHelper class:

public Cursor getRules()
{
    SQLiteDatabase db=this.getReadableDatabase();
    Cursor cur=db.rawQuery("SELECT * from Rules",new String [] {}); 
    Log.d("Cursor Size", "" + cur.getCount());
    db.close();
    return cur;
}

It returns a Cursor and on the activity, I consume it like

    Cursor ruleCursor=DatabaseHelper.getInstance(this).getRules();
    if(ruleCursor!=null)
    {
        RuleManager.getInstance(this,null).loadRules(ruleCursor);
        ruleCursor.close();
    }

(I am not moving the entire cursor handling inside the DatabaseHelper class and return just a list of Objects instead of cursor), the problem is that if I don’t Log.d in getRules(), entire program fails. i get an “Invalid Statement in fillWindow()” error, and SQLite doesn’t return any row on a “Select” statement.

Just adding a Log.d for cursor.getCount() solves everything. Also, to mention, this thing was working fine till yesterday and is behaving like this from the last evening.

Am I missing something? Is this behavior expected?

Answer 1

Try using this

//Stop worrying about the DatabaseHelper here.

public Cursor getAllRows() {
    Cursor c=getReadableDatabase().rawQuery("select * from RULES", null);
    return c;
}

//and where ever you use the Cursor(or “Consume” your cursor) just.

c=db.getAllRows();
startManagingCursor(c);

Hope it helps you!!