what is the use of SQLiteDatabase.CursorFactory in Android?
android, sqlite
Solution
The reason of passing null is you want the standard `SQLiteCursor` behaviour. If you want to implement a `specialized Cursor` you can get it by by extending the `Cursor class`( this is for doing additional operations on the query results). And in these cases, you can use the `CursorFactory` class to return an instance of your Cursor implementation. Here is the document for that
SQLiteDatabase.CursorFactory DOC
Used to allow returning sub-classes of Cursor when calling query.
Problem
I have created a database by extending `SQLiteOpenHelper` class. And its created also. This is code I am pasting ``` public Imagehelper(Context context) { super(context, DATABASE_NAME, null, SCHEMA_VERSION); cntxt = context; filename = Environment.getExternalStorageDirectory(); DATABASE_FILE_PATH_EXTERNAL = filename.getAbsolutePath()+File.separator+DATABASE_NAME; Log.i("Log", ":"+DATABASE_FILE_PATH_EXTERNAL); } ``` Here everything is working fine. But if you focus on the parameters pass in super super(context, DATABASE_NAME, null, SCHEMA_VERSION); . I am not able to understand the null parameter. I know here we have to pass the SQLiteDatabase.CursorFactory object. But how?? And what is the use of that??