java - Got this error : This class should provide a default constructor for dbHelper -

    package com.mytelco.ahliang125.mytelco;  import android.content.context; import android.database.sqlite.sqlitedatabase; import android.database.sqlite.sqliteopenhelper;  /**  * created ahliang125 on 4/29/2015.  */  public class dbhelper extends sqliteopenhelper {     //databaserecord     public static final string database_create_record = "create table " +             databaserecord.database_table_record + " ("             + databaserecord.key_id +             " integer primary key autoincrement, " +             databaserecord.name + " text not null, " +             databaserecord.title + " text not null, " +             databaserecord.link + " text not null," +             databaserecord.remark + " text not null, " +             databaserecord.priority + " text not null, " +             databaserecord.username + " text not null);";      //databaserecord     public static final string database_create_user = "create table " +             databaseuser.database_table_user + " ("             + databaseuser.key_id +             " integer primary key autoincrement, " +             databaseuser.username + " text not null, " +             databaseuser.password + " text not null);";      //version number upgrade database version     //each time if add, edit table, need change     //version number.     public static final int database_version = 3;      //databaserecord table     public static final string database_table_record = "mytelco_databaserecord";      // databaserecord name     public static final string database_name_record = "mytelco_databaserecord";      //databaseuser table     public static final string database_table_user = "mytelco_databaseuser";      // databaseuser name     public static final string database_name_user = "mytelco_databaseuser";      //databaserecord path     public static final string database_path = "/data/data/com.example.ahliang125.mytelco/databases/";      public static final string key_id = "_id";     public static final string name = "name";     public static final string title = "title";     public static final string link = "link";     public static final string remark = "remark";     public static final string priority = "priority";     public static final string username = "username";     public static final string password = "password";      /*public dbhelper(context context, string name, sqlitedatabase.cursorfactory factory, int version) {         super(context, name, factory, version);     }*/      @override     public void oncreate(sqlitedatabase sqlitedatabase) {          //all necessary tables create  create here         sqlitedatabase.execsql(database_create_record);         sqlitedatabase.execsql(database_create_user);     }      @override     public void onupgrade(sqlitedatabase sqlitedatabase, int i, int i2) {          sqlitedatabase.execsql("drop table if exists "                 + databaserecord.database_table_record);         oncreate(sqlitedatabase);     }      public dbhelper(context context) {         super(context, "mytelco_database.db", null, database_version);     }       /* //---opens database---     public dbhelper open() {         db = dbhelper.getwritabledatabase();         return this;     }      //---closes database---     public void close() {         dbhelper.close();     }*/  } 

this happens when try sign apk upload google play store. google few hours , tried solutions still same error. help!i know there no default constructor sqliteopenhelper , need call explicit constructor.

i think happened because don't have constructor super class http://developer.android.com/reference/android/database/sqlite/sqliteopenhelper.html

try add sqliteopenhelper(context context, string name, sqlitedatabase.cursorfactory factory, int version) , sqliteopenhelper(context context, string name, sqlitedatabase.cursorfactory factory, int version, databaseerrorhandler errorhandler)

public dbhelper(context context, string name, sqlitedatabase.cursorfactory factory, int version) {     super(context, name, factory, version); } 

and same other constructor