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How should a SQLiteDatabase connection be handled inside an AsyncTaskLoader?

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By User



I wondering where and when I should open/close my SQLiteDatabase connection in my AsyncTaskLoader. I don't feel like i fully understand the lifecycle of a Loader, so I'm afraid that I might run into some memory leaks/NullPointerExceptions if I don't to this right. I currently open up my SQLiteDatabase in the constructor of my loader:







private class SQLiteCursorLoader extends AsyncTaskLoader<Cursor> {



    private String _queryString;

    private SQLiteDatabase _db;

    ...



    public SQLiteCursorLoader(Context context, String queryString) {

        super(context);

        _queryString = queryString;

        _db = MySQLiteOpenHelper.getWritableDatabase();

    }



    ....



}







But where do I close the connection again?


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Comments

  1. Tips For AllMarch 5, 2012 at 7:12 AM

    The best way would probably be to take a copy of CursorLoader.java and modify the loadInBackground() method to use your SQLiteDatabase

    /* Runs on a worker thread */
    @Override
    public Cursor loadInBackground() {
    Cursor cursor = // Your stuff goes here <..>
    if (cursor != null) {
    // Ensure the cursor window is filled
    cursor.getCount();
    registerContentObserver(cursor, mObserver);
    }
    return cursor;
    }

    ReplyDelete

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