access .sqlite database on assets folder

I know it's been asked many times in stackoverflow. Those posts have answers too, but none of them works for me.

I have a database file mydb.sqlite placed it on assets folder. But it fails on the .openDatabase line. What am I doing wrong? In other posts I see that the dbpath pointing to /data/data, but I'm having hard time finding that path in my project.

This is my very first android app. I have been an iphone developer for few years now.

Error: android.database.sqlite.SQLiteCantOpenDatabaseException: unknown error (code 14): Could not open database

    try {
        SQLiteDatabase db = SQLiteDatabase.openDatabase("/android_asset/mydb.sqlite", null, SQLiteDatabase.NO_LOCALIZED_COLLATORS|SQLiteDatabase.OPEN_READONLY);
        Cursor cursor = db.rawQuery("SELECT * FROM mytable", null);
        cursor.moveToFirst();
    } catch (Exception e) {
        e.printStackTrace();
    }