android - The method onFetchComplete(List<Application>) of type MainActivity must override a superclass method error -

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i trying show content mysql database in listview below listactivity implementing interface fetchdatalistener.but giving errors 1.the method onfetchcomplete(list) of type mainactivity must override superclass method error 2.the method onfetchfailure(list) of type mainactivity must override superclass method error

please see below class , interface files

class

/*package com.example.androidhive; import java.util.list;  import android.app.listactivity; import android.app.progressdialog; import android.os.bundle; import android.widget.toast;  public class mainactivity extends listactivity implements fetchdatalistener{ private progressdialog dialog;  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);            setcontentview(r.layout.activity_main);            initview();   }  private void initview() {     // show progress dialog     dialog = progressdialog.show(this, "", "loading...");      string url = "http://192.168.0.2/android_login_api/include/apps.php";     fetchdatatask task = new fetchdatatask(this);     task.execute(url); }  @override public void onfetchcomplete(list<application> data) {     // dismiss progress dialog     if(dialog != null)  dialog.dismiss();     // create new adapter     applicationadapter adapter = new applicationadapter(this, data);     // set adapter list     setlistadapter(adapter);        }  @override public void onfetchfailure(string msg) {     // dismiss progress dialog     if(dialog != null)  dialog.dismiss();     // show failure message     toast.maketext(this, msg, toast.length_long).show();        } } */

interface

/*package com.example.androidhive;  import java.util.list;  public interface fetchdatalistener { public void onfetchcomplete(list<application> data);  public void onfetchfailure(string msg); } */

please me, in advance

use sqlitedatabase class this

 sqlitedatabase db = openorcreatedatabase("database_name", mode_private, null);   //create table   string  strsql = "create table if not exists tablename(name  varchar(30),id    int(15)  unique) "; db.execsql(strsql);

you can fire query in mysql(insert,update,delete) using db.execsql()

to retrive data can use this

 strsql = "select * tablename ";   cursor c = db.rawquery(strsql, null);      int count = c.getcount();     c.movetofirst();      while (k >= 0) {               listviewcontent.add(c.getstring(c.getcolumnindex("name")));         setlistadapter(new listviewadapter(this));         c.movetonext();         k--;      }   //you can set retrived data list view shown above.

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