java - Getting an error while creating new instance SQLITE -

i have error while making creating new instance writing data database sqllite

this code of database class

    package com.example.tttt;  import android.content.contentvalues; import android.content.context; import android.database.cursor; import android.database.sqlexception; import android.database.sqlite.sqlitedatabase; import android.database.sqlite.sqliteopenhelper;   public class info {      public static final string key_nom = "nom_personne";     public static final string key_id = "id_personne";     public static final string key_prenom = "prenom_personne";     private static final string database_name = "infodb";     private static final string database_table = "infotable";     private static final int database_version = 1 ;     private dbhelper ourhelper;     private context ourcontext ;     private sqlitedatabase ourdatabase ;      private static class dbhelper extends sqliteopenhelper {          public dbhelper(context context) {             super(context, database_name,null , database_version );             // todo auto-generated constructor stub         }          @override         public void oncreate(sqlitedatabase db) {             // todo auto-generated method stub             db.execsql( "create table " + database_table + " (" +         key_id  + " integer primary key autoincrement, " +         key_nom + " text not null, " +         key_prenom + " text not null);"                      );          }          @override         public void onupgrade(sqlitedatabase db, int arg1, int arg2) {             // todo auto-generated method stub             db.execsql("drop table if exists " + database_table);             oncreate(db);         }   } public info open() throws sqlexception{     ourhelper = new dbhelper(ourcontext);     ourdatabase = ourhelper.getwritabledatabase();     return this; }     public void close(){     ourhelper.close(); }     public long createentry(string name, string prenom) {         // todo auto-generated method stub         contentvalues cv = new contentvalues();         cv.put(key_nom, name);         cv.put(key_prenom, prenom);         return ourdatabase.insert(database_table, null, cv);      } 

in class activity wrote

 info entry = new info(this);             entry.open();             entry.createentry(name , prenom );             entry.close(); 

i had error on info entry = new info(this); message error : " constructor info(new view.onclicklistener(){}) undefined "

when change info entry = new info(intro.this);

i got: "the constructor info(intro) undefined"

the full intro activity try information user , send them database

package com.example.tttt;  import com.example.tttt.r.layout;  import android.app.activity; import android.app.dialog; import android.content.intent; import android.os.bundle; import android.os.dropboxmanager.entry; import android.view.view; import android.view.view.onclicklistener; import android.view.viewgroup.layoutparams; import android.widget.button; import android.widget.edittext; import android.widget.textview;  public class intro extends activity  { button sqlupdate,sqlview,sqlsearch; edittext sqlnom, sqlprenom,sqltextsearch ;      @override     protected void oncreate(bundle savedinstancestate) {         // todo auto-generated method stub         super.oncreate(savedinstancestate);       setcontentview(r.layout.intro);       sqlnom = (edittext)findviewbyid(r.id.nomenter);       sqlprenom = (edittext)findviewbyid(r.id.prenomenter);       sqlupdate =        (button) findviewbyid(r.id.button1);       sqlview =        (button) findviewbyid(r.id.button2);     //  sqlsearch =        (button) findviewbyid(r.id.button3);    //   sqltextsearch = (edittext)findviewbyid(r.id.edittext1);         sqlupdate.setonclicklistener(new view.onclicklistener() {          @override         public void onclick(view arg0) {             // todo auto-generated method stub             boolean diditwork = true ;              try{             string name = sqlnom.gettext().tostring();             string prenom = sqlprenom.gettext().tostring();               entry = new info();         entry.open();         entry.createentry(name , prenom );         entry.close();              }catch (exception e ){            diditwork = false ;           string error = e.tostring();           dialog d = new dialog(intro.this);              d.settitle(" merde ");             textview tv = new textview(intro.this);             tv.settext(error);             d.setcontentview(tv);             d.show();             }finally{          if (diditwork){             dialog d = new dialog(intro.this);              d.settitle(" okkk ");             textview tv = new textview(intro.this);             tv.settext(" ok yes ");             d.setcontentview(tv);             d.show();          }              }         }       });       sqlview.setonclicklistener(new view.onclicklistener() {          @override         public void onclick(view arg0) {             // todo auto-generated method stub             intent open = new intent("android.intent.action.sqlview");             startactivity(open);         }        });       sqlsearch.setonclicklistener(new view.onclicklistener() {          @override         public void onclick(view arg0) {             // todo auto-generated method stub      /*string s = sqltextsearch.gettext().tostring();              info se = new info();             se.open();             string returne = se.search();        */                  }     });       }   } 

you have initialize info class without parameters:

info entry = new info(); 

btw. common in class names write first letter uppercase: info

furthermore. if dont have more code in info application throw nullpointerexception here ourdatabase.insert(database_table, null, cv);