android - Saving Multiple Fragments State -

i implemented appcompatactivity used fragment transaction. 1 appcompatactivity like:

public class uiactivity extends appcompatactivity { ... } 

the fragment can begin transaction, leading having more 1 fragment of same class in stack. (illustration)

public class uifragment extends fragment implements filechooserlistener {    mybutton.setonclicklistener(){    // stuff, met condition , add fragment ( of uifragment), possibly inflating view, add previous fragment stack    } } 

this works fine except when implemented onsaveinstance,on restore instance inflate firstfragment while other lost. want resume user stopped , being able access fragment in stack when user press button.

implementation

in uiactivity

uifragment uif;     @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         overridependingtransition(r.anim.push_up_in, r.anim.push_up_out);         setcontentview(r.layout.activity_ui);           if (savedinstancestate == null) {               uif = new uifragment();             bundle bundle = new bundle();             bundle.putserializable("step", getintent().getextras().getserializable("step"));             bundle.putstring(uifragment.step_key, getintent().getextras().getstring(uifragment.step_key));              uif.setarguments(bundle);               fragmenttransaction transaction = getsupportfragmentmanager().begintransaction();             transaction.add(r.id.content_frame, uif, "myfragment").commitallowingstateloss();         }     }       public void onsaveinstancestate(bundle outstate){         getsupportfragmentmanager().putfragment(outstate,"myfragment",uif);     }     public void onrestoreinstancestate(bundle instate){         uif = (uifragment)getsupportfragmentmanager().findfragmentbytag("myfragment");      } 

snippet adds uifragment stack

public void addnewuifragment(){ uifragment uif= new uifragment ();                     bundle bundle = new bundle();                     bundle.putserializable("step", step);                     bundle.putstring(uifragment.step_key, sdata);                     uif.setarguments(bundle);                      fragmenttransaction transaction = fragmentmanager.begintransaction();                     transaction.addtobackstack(null);                     transaction.setcustomanimations(r.anim.slide_in, r.anim.slide_out, r.anim.back_slide_in,                             r.anim.back_slide_out);                     transaction.add(r.id.content_frame, uif, "myfragment").commitallowingstateloss(); }