java - Android application trying to implement login via Google plus shows strange system error -

i trying login via google plus in application, getting strange error , have searched everywhere , regarding same, no luck. below code implementation been done. logcat showing system error of java.lang.illegalargumentexception: googleapiclient parameter required

mainactivity.java

public class mainactivity extends activity implements com.google.android.gms.common.googleplayservicesclient.connectioncallbacks, com.google.android.gms.common.googleplayservicesclient.onconnectionfailedlistener, onclicklistener, onaccessrevokedlistener{  private static final string tag = "mainactivity";  // magic number use know our sign-in error // resolution activity has completed. private static final int our_request_code = 49404;  // core google+ client. private plusclient mplusclient;   // flag stop multiple dialogues appearing user. private boolean mresolveonfail;  // can store connection result failed connect() // attempt in order make application feel bit more // responsive user. private connectionresult mconnectionresult;  // progress dialog display when user connecting in // case there delay in of dialogs being ready. private progressdialog mconnectionprogressdialog;  private googleapiclient mgoogleapiclient;   @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);      setcontentview(r.layout.activity_main);        mplusclient = new plusclient.builder(this, this, this)             .setactions("http://schemas.google.com/addactivity",                     "http://schemas.google.com/buyactivity")             .build();              // use mresolveonfail flag whether should trigger             // resolution of connectionfailed connectionresult.             mresolveonfail = false;              // connect our sign in, sign out , disconnect buttons.             findviewbyid(r.id.sign_in_button).setonclicklistener(this);             findviewbyid(r.id.sign_out_button).setonclicklistener(this);             findviewbyid(r.id.revoke_access_button).setonclicklistener(this);             findviewbyid(r.id.sign_out_button).setvisibility(view.invisible);             findviewbyid(r.id.revoke_access_button).setvisibility(view.invisible);              // configure progressdialog shown if there             // delay in presenting user next sign in step.             mconnectionprogressdialog = new progressdialog(this);             mconnectionprogressdialog.setmessage("signing in...");  } @override protected void onstart() {     super.onstart();     log.v(tag, "start");     // every time start want try connect. if     // succeeds we'll onconnected() callback. if     // fails we'll onconnectionfailed(), result!     mplusclient.connect(); }  @override protected void onstop() {     super.onstop();     log.v(tag, "stop");     // can little costly keep connection open     // google play services, each time our activity     // stopped should disconnect.     mplusclient.disconnect(); }  @override public void onconnectionfailed(connectionresult result) {     log.v(tag, "connectionfailed");     // of time, connection fail     // user resolvable result. can store in our     // mconnectionresult property ready used     // when user clicks sign-in button.     if (result.hasresolution()) {         mconnectionresult = result;         if (mresolveonfail) {             // local helper function starts             // resolution of problem, may             // showing user account chooser or similar.             startresolution();         }     } }  @override public void onconnected(bundle bundle) {     // yay! can oauth 2.0 access token using.     log.v(tag, "connected. yay!");      // turn off flag, if user signs out they'll have     // tap sign in again.     mresolveonfail = false;      // hide progress dialog if showing.     mconnectionprogressdialog.dismiss();      // hide sign in button, show sign out buttons.     findviewbyid(r.id.sign_in_button).setvisibility(view.invisible);     findviewbyid(r.id.sign_out_button).setvisibility(view.visible);     findviewbyid(r.id.revoke_access_button).setvisibility(view.visible);      // retrieve oauth 2.0 access token.     final context context = this.getapplicationcontext();      getprofileinformation();      asynctask task = new asynctask() {         @override         protected object doinbackground(object... params) {             string scope = "oauth2:" + scopes.plus_login;             try {                 // can retrieve token check via                 // tokeninfo or pass service-side                 // application.                 string token = googleauthutil.gettoken(context,                         mplusclient.getaccountname(), scope);             } catch (userrecoverableauthexception e) {                 // error recoverable, fix                 // displaying intent user.                 e.printstacktrace();             } catch (ioexception e) {                 e.printstacktrace();             } catch (googleauthexception e) {                 e.printstacktrace();             }             return null;         }     };     task.execute((void) null); }  private void getprofileinformation() {     try {         if (plus.peopleapi.getcurrentperson(mgoogleapiclient) != null) {             person currentperson = plus.peopleapi                     .getcurrentperson(mgoogleapiclient);             string personname = currentperson.getdisplayname();             string personphotourl = currentperson.getimage().geturl();             string persongoogleplusprofile = currentperson.geturl();             string email = plus.accountapi.getaccountname(mgoogleapiclient);              log.e(tag, "name: " + personname + ", plusprofile: "                     + persongoogleplusprofile + ", email: " + email                     + ", image: " + personphotourl);              txtname.settext(personname);             txtemail.settext(email);              // default profile url gives 50x50 px image             // can replace value whatever dimension want             // replacing sz=x             personphotourl = personphotourl.substring(0,                     personphotourl.length() - 2)                     + profile_pic_size;              new loadprofileimage(imgprofilepic).execute(personphotourl);          } else {             toast.maketext(getapplicationcontext(),                     "person information null", toast.length_long).show();         }     } catch (exception e) {         e.printstacktrace();     } } @override public void ondisconnected() {     // bye!     log.v(tag, "disconnected. bye!"); }  protected void onactivityresult(int requestcode, int responsecode,         intent intent) {     log.v(tag, "activityresult: " + requestcode);     if (requestcode == our_request_code && responsecode == result_ok) {         // if have successful result, want able         // resolve further errors, turn on resolution our         // flag.         mresolveonfail = true;          mplusclient.connect();     } else if (requestcode == our_request_code && responsecode != result_ok) {          mconnectionprogressdialog.dismiss();     } }  @override public void onclick(view view) {     switch (view.getid()) {     case r.id.sign_in_button:         log.v(tag, "tapped sign in");         if (!mplusclient.isconnected()) {             // show dialog signing in.             mconnectionprogressdialog.show();             // make sure start resolution (e.g. fire             // intent , pop dialog user) errors             // come in.             mresolveonfail = true;             // should have connection result ready resolve,             // can start process.             if (mconnectionresult != null) {                 startresolution();             } else {                 // if don't have 1 though, can start connect in                 // order retrieve one.                 mplusclient.connect();             }         }         break;     case r.id.sign_out_button:         log.v(tag, "tapped sign out");         // want sign out if we're connected.         if (mplusclient.isconnected()) {              mplusclient.cleardefaultaccount();               mplusclient.disconnect();             mplusclient.connect();              // hide sign out buttons, show sign in button.             findviewbyid(r.id.sign_in_button).setvisibility(view.visible);             findviewbyid(r.id.sign_out_button)                     .setvisibility(view.invisible);             findviewbyid(r.id.revoke_access_button).setvisibility(                     view.invisible);         }         break;     case r.id.revoke_access_button:         log.v(tag, "tapped disconnect");         if (mplusclient.isconnected()) {             // clear default account in sign out.             mplusclient.cleardefaultaccount();              mplusclient.revokeaccessanddisconnect(this);         }         break;     default:         // unknown id.     } }  @override public void onaccessrevoked(connectionresult status) {      mplusclient.connect();      // hide sign out buttons, show sign in button.     findviewbyid(r.id.sign_in_button).setvisibility(view.visible);     findviewbyid(r.id.sign_out_button).setvisibility(view.invisible);     findviewbyid(r.id.revoke_access_button).setvisibility(view.invisible); }  /**  * helper method flip mresolveonfail flag , start resolution  * of connenctionresult failed connect() call.  */ private void startresolution() {     try {          mresolveonfail = false;          mconnectionresult.startresolutionforresult(this, our_request_code);     } catch (sendintentexception e) {         // problems, try connect() again new         // connectionresult.         mplusclient.connect();     } }  @override public boolean oncreateoptionsmenu(menu menu) {      // inflate menu; adds items action bar if present.     getmenuinflater().inflate(r.menu.main, menu);     return true; }  @override public boolean onoptionsitemselected(menuitem item) {      int id = item.getitemid();     if (id == r.id.action_settings) {         return true;     }     return super.onoptionsitemselected(item); }  /**  * placeholder fragment containing simple view.  */ public static class placeholderfragment extends fragment {      public placeholderfragment() {     }      @override     public view oncreateview(layoutinflater inflater, viewgroup container,             bundle savedinstancestate) {         view rootview = inflater.inflate(r.layout.fragment_main, container,                 false);         return rootview;     } }  } 

logcat:

java.lang.illegalargumentexception: googleapiclient parameter required. @ com.google.android.gms.internal.eg.b(unknown source) @ com.google.android.gms.plus.plus.a(unknown source) @ com.google.android.gms.internal.ia.getcurrentperson(unknown source) @ com.example.googleplus.mainactivity.getprofileinformation(mainactivity.java:182) @ com.example.googleplus.mainactivity.onconnected(mainactivity.java:153) @ com.google.android.gms.internal.dw$c.onconnected(unknown source) @ com.google.android.gms.internal.dx.b(unknown source) @ com.google.android.gms.internal.dx.bt(unknown source) @ com.google.android.gms.internal.dw$h.b(unknown source) @ com.google.android.gms.internal.dw$h.b(unknown source) @ com.google.android.gms.internal.dw$b.br(unknown source) @ com.google.android.gms.internal.dw$a.handlemessage(unknown source) @ android.os.handler.dispatchmessage(handler.java:99) @ android.os.looper.loop(looper.java:123) @ android.app.activitythread.main(activitythread.java:3729) @ java.lang.reflect.method.invokenative(native method) @ java.lang.reflect.method.invoke(method.java:507) @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:874) @ com.android.internal.os.zygoteinit.main(zygoteinit.java:632) @ dalvik.system.nativestart.main(native method) 

you never set mgoogleapiclient anything.

this replaces old plusclient/gamesclient/appstateclient/etc. clients. create 1 googleapiclient , pass api methods.

where have mplusclient = ... want replace with

mgoogleapiclient = new googleapiclient.builder()     .addapi(plus.api, new plus.plusoptions.builder()         .addactivitytypes(             "http://schemas.google.com/addactivity",             "http://schemas.google.com/buyactivity")         .build())     .addconnectioncallbacks(this)     .addonconnectionfailedlistener(this)     .build() 

then delete mplusclient , use mgoogleapiclient instead.