SQLite .query() method, WHERE clause is only taking double quotes strings

Question

I have variable:

String owner=\"Mike\";
String[] columns ={\"quantity\", \"price\",\"owner\"}

My cursor is trying to get
Curso

Answer 1

 public Cursor show_vol(String  vol,String bk,String hadnu)
           { 
              SQLiteDatabase db = this.getReadableDatabase();
              String[] columns ={"hadith"};//colums name that you select

              Cursor res = db.query("volume2", columns, "hadithno=?", new String[] { hadnu }, null, null, null);

 //volume2 is table name  and hadithno is colume name  l
//select hadith from volume2 where hadithno=hadnu  //working like s

 1. List item

              return res;
           }