Zwróć wyszukane dane z sqlite

W zapytaniu item to ciąg, więc zmień

String strquery="select * from Articles where AS_name= "+item;

do

String strquery="select * from Articles where AS_name='" + item + "'";

Lub to

Cursor cur=null;
cur = db.query("Articles", null, "AS_name" + "=?",
            new String[] { item }, null, null, null, null);

zamiast

Cursor cur=null;
String strquery="select * from Articles where AS_name= "+item;
cur=db.rawQuery(strquery,null); 

I zmień

strvalue=cur.getString(0);

do

strvalue=cur.getString(cur.getColumnIndex("Desc_art"));