How to access Android activity class instance fields? -

suppose have 2 classes extends activity; activitya , activityb, , declared in manifest xml.

now, want call activityb activitya , access activityb's fields.

intent myintent = new intent(myapplication.getinstance().getapplicationcontext(), activityb.getclass()); startactivityforresult(myintent,0); 

this code not return object of activityb, have tried instantiation manually such that:

activityb actb=new activityb(); 

that's ok, how pass intent?

is possible?

now, want call activityb activitya , access activityb's fields.

please don't.

first, short of passing activities around via static data members or via service, impossible.

second, create garbage collection issues, android want destroy old activities free memory, after does, still holding references activities other activities, negating work.

third, holding destroyed instances of other activities, same reason in previous point -- android go on destroying activities whether or not.

i confident whatever problem think solving way can solved in other way.

edit

normally, pass data activitya activityb via intent extras on intent passed startactivity(). activityb's responsibility extract extras , them.