android - Facebook ProfilePictureView did not goes blank after logout -

i trying make make app integrated facebook , followed instruction facebook. however, "profilepictureview" did not return blank after logout. there ways "blank" profilepictureview or don't provide such function?

my code following:

package com.nick.militarycounter; import android.app.activity; import android.app.alertdialog; import android.content.intent; import android.os.bundle; import android.util.log; import android.widget.button; import android.widget.edittext; import android.widget.textview;  import com.facebook.facebookauthorizationexception; import com.facebook.facebookoperationcanceledexception; import com.facebook.request; import com.facebook.response; import com.facebook.session; import com.facebook.sessionstate; import com.facebook.uilifecyclehelper; import com.facebook.model.graphuser; import com.facebook.widget.loginbutton; import com.facebook.widget.profilepictureview;  public class registeractivity extends activity {  private static final string tag = "registeractivity"; private loginbutton loginbutton; private edittext edittextaccount; private edittext edittextenterdate; private button button1; private edittext edittextpassword; private edittext edittextdiscountdays; private profilepictureview facebookprofilepic; uilifecyclehelper uihelper;  @override public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.register_activity);      loginbutton = (loginbutton) findviewbyid(r.id.login_button);     edittextaccount = (edittext) findviewbyid(r.id.edittext_account);     edittextenterdate = (edittext) findviewbyid(r.id.edittext_enterdate);     button1 = (button) findviewbyid(r.id.button1);     edittextpassword = (edittext) findviewbyid(r.id.edittext_password);     edittextdiscountdays = (edittext) findviewbyid(r.id.edittext_discountdays);     facebookprofilepic = (profilepictureview) findviewbyid(r.id.facebook_profile_pic);     textview_username = (textview) findviewbyid(r.id.textview_loginstatus);      uihelper = new uilifecyclehelper(this, fblogincallback);     uihelper.oncreate(savedinstancestate);      loginbutton = (loginbutton) findviewbyid(r.id.login_button);     loginbutton             .setuserinfochangedcallback(new loginbutton.userinfochangedcallback() {                 @override                 public void onuserinfofetched(graphuser user) {                     registeractivity.this.muser = user;                 }             });      // find user's profile picture custom view     profilepictureview profilepictureview = (profilepictureview) findviewbyid(r.id.facebook_profile_pic);     profilepictureview.setcropped(true);  }  profilepictureview profilepictureview; graphuser muser; textview textview_username;  // "callback" defined how handle login result. private session.statuscallback fblogincallback = new session.statuscallback() {     @override     public void call(session session, sessionstate state,             exception exception) {         // failed         if ((exception instanceof facebookoperationcanceledexception || exception instanceof facebookauthorizationexception)) {             new alertdialog.builder(registeractivity.this).settitle("取消")                     .setmessage("登入失敗!").setpositivebutton("ok", null)                     .show();             textview_username.settext("登入失敗");          } // successed         else if (state.isclosed()) {             textview_username.settext("請按登入鍵登入");             // should reset image of profilepictureview here!         } else {             textview_username.settext("登入中...");             makemerequest(session);         }      } };  /**  * set user name , image  *   * @param session  */ private void makemerequest(final session session) {     // make api call user data , define     // new callback handle response.     request request = request.newmerequest(session,             new request.graphusercallback() {                 @override                 public void oncompleted(graphuser user, response response) {                     // if response successful                     if (session == session.getactivesession()) {                         if (user != null) {                             muser = user;                             facebookprofilepic.setprofileid(user.getid());                             textview_username.settext(user.getname());                         }                     }                     if (response.geterror() != null) {                         // handle errors, later.                      }                 }             });     request.executeasync(); }  @override protected void onresume() {     super.onresume();     uihelper.onresume();     log.d(tag, " onresume");      // 這個是用來檢查是不是由facebook中notification連結而來     // 同時讀取相關的資訊     // checkreceivedrequest();      loginbutton = (loginbutton) findviewbyid(r.id.login_button);     loginbutton             .setuserinfochangedcallback(new loginbutton.userinfochangedcallback() {                 @override                 public void onuserinfofetched(graphuser user) {                     registeractivity.this.muser = user;                 }             });      // find user's profile picture custom view     profilepictureview = (profilepictureview) findviewbyid(r.id.facebook_profile_pic);     profilepictureview.setcropped(true);  }  @override protected void onsaveinstancestate(bundle outstate) {     super.onsaveinstancestate(outstate);     uihelper.onsaveinstancestate(outstate);     log.d(tag, "onsaveinstancestate"); }  @override protected void onactivityresult(int requestcode, int resultcode, intent data) {     super.onactivityresult(requestcode, resultcode, data);     log.d(tag, "onactivityresult");     uihelper.onactivityresult(requestcode, resultcode, data); }  @override public void onpause() {     super.onpause();     uihelper.onpause();     log.d(tag, "onpause"); }  @override public void ondestroy() {     super.ondestroy();     uihelper.ondestroy();     log.d(tag, "ondestroy"); }  } 

thanks in advance!

please try :

 // remaining above code :     else if (state.isclosed()) {         textview_username.settext("請按登入鍵登入");         // should reset image of profilepictureview here!         profilepictureview.setimagebitmap(null);      } else {         textview_username.settext("登入中...");         makemerequest(session);     }  } 

or use below method:

public final void setdefaultprofilepicture(bitmap inputbitmap) 

the profilepictureview display provided image while specified profile being loaded, or if specified profile not available. parameters inputbitmap bitmap render until actual profile loaded.