Save Modified Phone Number to ContactList at respective index Android -

i retrieved position , phone number contact list. need save number in contactlist modifying orignal number. blocked @ step. please give me hint example type position = 2 , number = 3049393. here complete code.

public class mainactivity extends activity {      public static final int pick_contact    = 1;      textview txt_contacts;      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);          // opens activity. note  intent.action_get_content         // , intent.settype         ((button)findviewbyid(r.id.btn_contacts)).setonclicklistener( new onclicklistener() {             @override             public void onclick(view v) {                 // user bod suggests using intent.action_pick instead of .action_get_content avoid chooser                 intent intent = new intent(intent.action_get_content);                 // bod con't: content_type instead of content_item_type                 intent.settype(contactscontract.commondatakinds.phone.content_item_type);                 startactivityforresult(intent, 1);                   txt_contacts =(textview)findviewbyid(r.id.txt_contacts);             }         });     }      @override     public boolean oncreateoptionsmenu(menu menu) {         // inflate menu; adds items action bar if present.         getmenuinflater().inflate(r.menu.activity_main, menu);         return true;     }      @override     protected void onactivityresult(int requestcode, int resultcode, intent data) {         if (data != null) {             uri uri = data.getdata();              if (uri != null) {                 cursor c = null;                 try {                     c = getcontentresolver().query(uri, new string[]{                                  contactscontract.commondatakinds.phone.number,                                   contactscontract.commondatakinds.phone.type },                             null, null, null);                      if (c != null && c.movetofirst()) {                         string number = c.getstring(0);                         int type = c.getint(1);                         showselectednumber(type, number);                     }                 } {                     if (c != null) {                         c.close();                     }                 }             }         }     }       public void showselectednumber(int type, string number) {          string new_num = 0+number;         txt_contacts.settext(new_num);      }     public void updatecontact() {         try {             arraylist<contentprovideroperation> ops = new arraylist<contentprovideroperation>();              ops.add(contentprovideroperation.newupdate(data.content_uri)                 .withselection(data.raw_contact_id + " = ?", new string[] {mrawcontactid})                 .withselection(data._id + " = ?", new string[] {mdataid})                 .withvalue(data.mimetype, email.content_item_type)                 .withvalue(data.data1, memail)                 .withvalue(email.type, email.type_home)                 .build());             getcontentresolver().applybatch(contactscontract.authority, ops);             mresult.settext("updated");         } catch (exception e) {             // display warning             log.w("updatecontact", e.getmessage());             for(stacktraceelement ste : e.getstacktrace()) {                 log.w("updatecontact", "\t" + ste.tostring());             }             context ctx = getapplicationcontext();             int duration = toast.length_short;             toast toast = toast.maketext(ctx, "update failed", duration);             toast.show();         }     }              } 

update :

public void showselectednumber(int type, string number) {

    string new_num = 0+number;     system.out.println("display name:"+ number);       contentvalues _changed_values=new contentvalues();      _changed_values.put(contactscontract.commondatakinds.phone.number,new_num);             getcontentresolver().update(uri,_changed_values,contactscontract.commondatakinds.phone._id+"=?",     new string[]{integer.tostring(type)});               // if want change number       txt_contacts.settext(new_num);  } 

contentvalues _changed_values=new contentvalues();

// if want change number _changed_values.put(contactscontract.commondatakinds.phone.number,"mention number");

//where have change _id= mention id of particular contact

getcontentresolver().update(uri,_changed_values,contactscontract.commondatakinds.phone.id+"=?",
new string[]{_id} }