how to connect to sqlite database in android studio?

I created a sqlite database (mydb.db) using sql browser then I created assets folder in the android application and added the mydb.db file on it.

how to connect to this database ? I use this code but it doesn't work properly with me any help please?

 SQLiteDatabase db;
    db = openOrCreateDatabase("DataBase.db",
            SQLiteDatabase.CREATE_IF_NECESSARY, null);

    Cursor c=db.rawQuery("SELECT * FROM user",null);
    c.moveToFirst();
    while(!c.isAfterLast())
    {
        Toast.makeText(this,c.getString(0)+ " "+c.getString(1),Toast.LENGTH_SHORT).show();
        c.moveToNext();
    }
    db.close();