android - Error Code : 1 (SQLITE_ERROR) Caused By : SQL(query) error or missing database -

by click on snackbar want add page favourite list face error when click snackbar:

error code : 1 (sqlite_error) caused : sql(query) error or missing database. (no such table: ghavaed (code 1): , while compiling: insert ghavaed(saal,title) values (?,?))

this first project please help

here page class want add favourite lists:

public class styleghaede extends appcompatactivity {  string title, tozih, sarfasl, saal; textview style_ghaede_content; @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);      bundle extras = getintent().getextras();     title = extras.getstring("title");     tozih = extras.getstring("tozih");     sarfasl = extras.getstring("sarfasl");     saal = extras.getstring("saal");     setcontentview(r.layout.activity_style_ghaede);      getcomponent();     style_ghaede_content.settext(tozih); }  private void getcomponent(){     toolbar toolbar = (toolbar) findviewbyid(r.id.toolbar);     setsupportactionbar(toolbar);     getsupportactionbar().settitle(title);      final database db=new database(this);     final ghavaed fq=new ghavaed();      floatingactionbutton fab = (floatingactionbutton) findviewbyid(r.id.fab);     fab.setonclicklistener(new view.onclicklistener() {         @override         public void onclick(view view) {             snackbar.make(view, "", snackbar.length_long)                     .setaction("برای اضافه کردن به لیست علاقه مندی کلیک کنید", new view.onclicklistener() {                         @override                         public void onclick(view v) {                             db.addtofavourite(fq.getsaal(),fq.gettitle());                         }                     }).show();         }     });      style_ghaede_content = (textview) findviewbyid(r.id.style_ghaede_content); } } 

my favouritelist class:

public class favourite_list extends appcompatactivity {  list<ghavaed> favouritelist; database db=new database(this);  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_favourite__list);     favouritelist=db.getfavouriteqavaed();     listview listview = (listview) findviewbyid(r.id.list_view_fav);     final adapter_favourite adapter_fav = new adapter_favourite(getapplicationcontext(),favouritelist);     listview.setadapter(adapter_fav);     ghavaed fq = new ghavaed();      //swipelist     swipelayout swipelayout =  (swipelayout)findviewbyid(r.id.fav_item);     swipelayout.setshowmode(swipelayout.showmode.laydown);     swipelayout.adddrag(swipelayout.dragedge.left, findviewbyid(r.id.bottom_wrapper));     swipelayout.addswipelistener(new swipelayout.swipelistener() {         @override         public void onclose(swipelayout layout) {             //when surfaceview totally cover bottomview.         }          @override         public void onupdate(swipelayout layout, int leftoffset, int topoffset) {             //you swiping.         }          @override         public void onstartopen(swipelayout layout) {         }          @override         public void onopen(swipelayout layout) {             //when bottomview totally show.         }          @override         public void onstartclose(swipelayout layout) {         }          @override         public void onhandrelease(swipelayout layout, float xvel, float yvel) {             //when user's hand released.         }     }); } } 

my database:

public class database extends sqliteopenhelper {  private static final int database_version = 1; // database name private static final string database_name = "database"; private static final string table_favourite_ghavaed = "ghavaed";  private static final string tozih = "tozih"; private static final string saal = "saal"; private static final string title = "title"; private static final string tag = "database";  public database(context context) {     super(context, database_name, null, database_version); }  @override public void oncreate(sqlitedatabase db) {      string create_favourite_ghavaed_table = "create table " + table_favourite_ghavaed + "("             + saal + " text,"             + title + " text" + ")";     db.execsql(create_favourite_ghavaed_table); }  @override public void onupgrade(sqlitedatabase db, int oldversion, int newversion) {     db.execsql("drop table if exists " + table_favourite_ghavaed);     // create tables again     oncreate(db); }  public void addtofavourite(string saal, string title) {     sqlitedatabase db = this.getwritabledatabase();     contentvalues values = new contentvalues();     values.put(saal, saal); // product name     values.put(title, title); // product number     // inserting row     db.insert(table_favourite_ghavaed, null, values);     db.close(); // closing database connection     // log.i("setuserexam", "addtofavourite : done!!"); }  public void removefavourite(string saal, string title) {     sqlitedatabase db = this.getwritabledatabase();     db.execsql("delete  " + table_favourite_ghavaed + " saal ='" + saal + "' , title = '" + title + "' ");     db.close(); }  public list<ghavaed> getfavouriteqavaed() {     list<ghavaed> favouriteqavaedlist = new arraylist<>();      sqlitedatabase db = this.getreadabledatabase();     cursor cursor = db.rawquery("select * ghavaed", null);     if (cursor.movetofirst()) {         {             ghavaed favouriteqavaed = new ghavaed();             favouriteqavaed.setsaal(cursor.getstring(0));             favouriteqavaed.settitle(cursor.getstring(3));            // favouriteqavaed.settozih(cursor.getstring(2));              // adding contact list             favouriteqavaedlist.add(favouriteqavaed);         } while (cursor.movetonext());     }     db.close();     return favouriteqavaedlist; }  public integer getfavouritesnumber() {     sqlitedatabase db = this.getreadabledatabase();     cursor cursor = db.rawquery("select * ghavaed", null);     return cursor.getcount(); }  public boolean checkisfavourite(string saal, string title) {     sqlitedatabase db = this.getreadabledatabase();     cursor cursor = db.rawquery("select * ghavaed saal = '" + saal + "'" +             "and title = '" + title + "' ", null);     if (cursor != null && cursor.getcount() > 0) {         cursor.movetofirst();         db.close();         return true;     } else {         db.close();         return false;     } } }  public class ghavaed { string saal, sarfasl, tozih, title;  public string getsaal() {     return saal; }  public void setsaal(string saal) {     this.saal = saal; }  public string getsarfasl() {     return sarfasl; }  public void setsarfasl(string sarfasl) {     this.sarfasl = sarfasl; }  public string gettozih() {     return tozih; }  public void settozih(string tozih) {     this.tozih = tozih; }  public string gettitle() {     return title; }  public void settitle(string title) {     this.title = title; } }