android - How to insert data from edittext -

i try insert db.insert(inputfname, inputlname, inputnickname); it's error .it tell me "the method insertdata(edittext, edittext, edittext) undefined type friendsdb insertactivity.java" can tell me please

this code (mainactivity) package com.example.sqlite;

import java.security.publickey;  import com.example.sqlite.db.friendsdb;  import android.app.activity; import android.content.context; import android.content.intent; import android.os.bundle; import android.view.view; import android.widget.button; import android.widget.edittext;  public class insertactivity extends activity { private context context; private friendsdb db; edittext inputfname; edittext inputlname; edittext inputnickname; button save; button cancle;  @override protected void oncreate(bundle savedinstancestate) {     // todo auto-generated method stub     super.oncreate(savedinstancestate);     setcontentview(r.layout.insert_layout);      //view matching     inputfname = (edittext)findviewbyid(r.id.fname);     inputlname = (edittext)findviewbyid(r.id.lname);     inputnickname = (edittext)findviewbyid(r.id.nickname);     save = (button)findviewbyid(r.id.save);     cancle = (button)findviewbyid(r.id.cancle);      //context             context = this;             db = new friendsdb(context);      //button event     save.setonclicklistener(new view.onclicklistener() {          @override         public void onclick(view arg0) {             intent insertdata = new intent(insertactivity.this,friendslistactivity.class);             insertdata.putextra("fname", inputfname.gettext().tostring());             insertdata.putextra("lname", inputlname.gettext().tostring());             insertdata.putextra("nickname", inputnickname.gettext().tostring());             if(insertdata!=null){                   db.insert(inputfname, inputlname, inputnickname); <<<<<< error             }         }     } ); 

this friendsdb code

package com.example.sqlite.db;  import java.util.arraylist;  import com.example.sqlite.entry.friendentry;  import android.content.contentvalues; import android.content.context; import android.database.cursor; import android.database.sqlite.sqlitedatabase;  //ใช้ในการ inert update delete public class friendsdb {     private friendsdbhelper helper; private sqlitedatabase db;  public friendsdb(context context){     helper = new friendsdbhelper(context);     db = helper.getwritabledatabase(); } //insert     public long insert(string fname,string lname,string nickname){         contentvalues values = new contentvalues();         values.put(friendsdbhelper.table_key_fname, fname);         values.put(friendsdbhelper.table_key_lname, lname);         values.put(friendsdbhelper.table_key_nickname, nickname);         return db.insert(friendsdbhelper.table_name, null ,values);      } //select     public arraylist<friendentry> selectall(){         arraylist<friendentry> friends = new arraylist<friendentry>();         //   cursor คือ ชุดข้อมูล         cursor cursor = db.rawquery("select*from"+friendsdbhelper.table_name+"where    id != ?",new string[]{integer.tostring(0)});         cursor.movetofirst();         if(cursor.getcount()!=0){             do{                 friendentry friend = new friendentry();                   friend.setid(cursor.getint(cursor.getcolumnindex(friendsdbhelper.table_key_id)));                 friend.setfname(cursor.getstring(cursor.getcolumnindex(friendsdbhelper.table_key_fname)));                 friend.setlname(cursor.getstring(cursor.getcolumnindex(friendsdbhelper.table_key_lname)));                 friend.setnickname(cursor.getstring(cursor.getcolumnindex(friendsdbhelper.table_key_nickname)));                 friends.add(friend);              }while(cursor.movetonext());          }          return friends;     } 

change this

db.insert(inputfname, inputlname, inputnickname);  

to

db.insert(inputfname.gettext().tostring(), inputlname.gettext().tostring(), inputnickname.gettext().tostring());  

your database insert method takes strings arguments.

insert(string fname,string lname,string nickname)// arguments strings