android - runtime error about FriendsDBHelper -

this logcat error

08-20 10:37:52.463: e/database(1361): failure 1 (near "create_tablefriends": syntax error) on 0x9f418b8 when preparing 'create_tablefriends(id integer primary key autoincremaent,fname text(20), lname text(30), nickanme text(20))'. 08-20 10:37:52.481: d/androidruntime(1361): shutting down vm 08-20 10:37:52.481: w/dalvikvm(1361): threadid=1: thread exiting uncaught exception (group=0xb60084f0) 08-20 10:37:52.527: e/androidruntime(1361): fatal exception: main 08-20 10:37:52.527: e/androidruntime(1361): java.lang.runtimeexception: unable start activity componentinfo{com.example.sqlite/com.example.sqlite.insertactivity}: android.database.sqlite.sqliteexception: near "create_tablefriends": syntax error: create_tablefriends(id integer primary key autoincremaent,fname text(20), lname text(30), nickanme text(20)) 08-20 10:37:52.527: e/androidruntime(1361):     @ android.app.activitythread.performlaunchactivity(activitythread.java:1647) 08-20 10:37:52.527: e/androidruntime(1361):     @ android.app.activitythread.handlelaunchactivity(activitythread.java:1663) 08-20 10:37:52.527: e/androidruntime(1361):     @ android.app.activitythread.access$1500(activitythread.java:117) 08-20 10:37:52.527: e/androidruntime(1361):     @ android.app.activitythread$h.handlemessage(activitythread.java:931) 08-20 10:37:52.527: e/androidruntime(1361):     @ android.os.handler.dispatchmessage(handler.java:99) 08-20 10:37:52.527: e/androidruntime(1361):     @ android.os.looper.loop(looper.java:130) 08-20 10:37:52.527: e/androidruntime(1361):     @ android.app.activitythread.main(activitythread.java:3683) 08-20 10:37:52.527: e/androidruntime(1361):     @ java.lang.reflect.method.invokenative(native method) 08-20 10:37:52.527: e/androidruntime(1361):     @ java.lang.reflect.method.invoke(method.java:507) 08-20 10:37:52.527: e/androidruntime(1361):     @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:839) 08-20 10:37:52.527: e/androidruntime(1361):     @ com.android.internal.os.zygoteinit.main(zygoteinit.java:597) 08-20 10:37:52.527: e/androidruntime(1361):     @ dalvik.system.nativestart.main(native method) 08-20 10:37:52.527: e/androidruntime(1361): caused by: android.database.sqlite.sqliteexception: near "create_tablefriends": syntax error: create_tablefriends(id integer primary key autoincremaent,fname text(20), lname text(30), nickanme text(20)) 08-20 10:37:52.527: e/androidruntime(1361):     @ android.database.sqlite.sqlitedatabase.native_execsql(native method) 08-20 10:37:52.527: e/androidruntime(1361):     @ android.database.sqlite.sqlitedatabase.execsql(sqlitedatabase.java:1763) 08-20 10:37:52.527: e/androidruntime(1361):     @ com.example.sqlite.db.friendsdbhelper.oncreate(friendsdbhelper.java:30) 08-20 10:37:52.527: e/androidruntime(1361):     @ android.database.sqlite.sqliteopenhelper.getwritabledatabase(sqliteopenhelper.java:126) 08-20 10:37:52.527: e/androidruntime(1361):     @ com.example.sqlite.db.friendsdb.<init>(friendsdb.java:19) 08-20 10:37:52.527: e/androidruntime(1361):     @ com.example.sqlite.insertactivity.oncreate(insertactivity.java:43) 08-20 10:37:52.527: e/androidruntime(1361):     @ android.app.instrumentation.callactivityoncreate(instrumentation.java:1047) 08-20 10:37:52.527: e/androidruntime(1361):     @ android.app.activitythread.performlaunchactivity(activitythread.java:1611) 08-20 10:37:52.527: e/androidruntime(1361):     ... 11 more 

this code form frienddbhelper

package com.example.sqlite.db;  import android.content.context; import android.database.sqlite.sqlitedatabase; import android.database.sqlite.sqlitedatabase.cursorfactory; import android.database.sqlite.sqliteopenhelper; import android.util.log;  public class friendsdbhelper extends sqliteopenhelper {  public static string table_name ="friends";  public static int table_version = 1;  public static string table_key_id = "id";  public static string table_key_fname = "fname";  public static string table_key_lname = "lname";  public static string table_key_nickname = "nickanme";  public static string table_cerate_sql = "create_table"+table_name+"("+"" +                                             ""+table_key_id+" integer primary key autoincremaent,"+                                             ""+table_key_fname+" text(20), "+                                             ""+table_key_lname+" text(30), "+                                             ""+table_key_nickname+" text(20)"+                                         ")";  public friendsdbhelper(context context) {     super(context, table_name, null, table_version);     // todo auto-generated constructor stub }  @override public void oncreate(sqlitedatabase db) {     db.execsql(table_cerate_sql);  }  @override public void onupgrade(sqlitedatabase db, int oldversion, int newversion) {     db.execsql("drop table"+table_name);     oncreate(db);     log.i("friend db helper","table upgraded "+oldversion+"to"+newversion); } 

}

this code when insert data sqlite

package com.example.sqlite;  import java.security.publickey;  import javax.xml.datatype.duration;  import com.example.sqlite.db.friendsdb; import com.example.sqlite.db.friendsdbhelper;  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; import android.widget.toast;  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){                 //insert data                 long recordid = db.insert(inputfname.gettext().tostring(), inputlname.gettext().tostring(), inputnickname.gettext().tostring());                 startactivity(insertdata);             }         }     } ); 

if want more information please tell me. thank you

i think there syntax error in create table sentence, erase " _ " , put space after table, , change autoincremaent autoincrement this:

public static string table_cerate_sql = "create table "+table_name+" ("+"" +                                             ""+table_key_id+" integer primary key autoincrement,"+                                             ""+table_key_fname+" text(20), "+                                             ""+table_key_lname+" text(30), "+                                             ""+table_key_nickname+" text(20)"+                                         ")";