android - getIntent().getExtra() returns null -

i have code direct users profile page bottom bar.

private void startnewintent(class classname, string uid){     intent intent = new intent(act, classname);     intent.putextra("uid", uid);     act.startactivity(intent);     act.finish(); }  classname = displayprofile.class; if(firebaseauth.getinstance().getcurrentuser() != null){     string uid = firebaseauth.getinstance().getcurrentuser().getuid();     startnewintent(displayprofile.class, uid); } else {     startnewintent(emailpasswordactivity.class); } 

in profileactivity.java

protected void oncreate(bundle savedinstancestate){     super.oncreate(savedinstancestate);     string uid = getintent().getstringextra("uid");     if(uid != null){         ...     } } 

i tried bundle = getintent().getextra() same results. have seen similar questions. seem case: getintent() extras null

i tried

intent.setflags(intent.flag_activity_single_top | intent.flag_activity_clear_top); 

but getintent().getextra != null still false.

thank , advice.

edit: added context startnewintent()

avoid ".class" if present in class name.

public void startnewintent(class classname, string uid){ intent intent = new intent(act.this, classname+".class"); intent.putextra("uid", uid); startactivity(intent); } 

next phase

@override protected void oncreate(bundle savedinstancestate){ super.oncreate(savedinstancestate); string uid = getintent().getextras().getstring("uid"); if(uid != null){     ...  } }