android - Saving the state of my App through rotation -

i building memory game app java class , need save words displayed through rotation of device...the widgets need saved , passed new oncreate() method button widgets used settext display words being shown....can save , pass entire state of application...here code not working , hoping insight...thanks...here code..

private bundle mybundle = new bundle(); ..... @override protected void oncreate(bundle savedinstancestate) {       super.oncreate(savedinstancestate);      setcontentview(r.layout.activity_eight);      if(savedinstancestate != null) {         savedinstancestate = mybundle;     }     ......     @override     public void onsaveinstancestate(bundle savedinstancestate) {        super.onsaveinstancestate(savedinstancestate);        mybundle = savedinstancestate; } 

you got semantics of using bundle backwards. don't ever want save bundle (or overwrite it). use serialize own state variables , out of it. example, if want preserve 2 integer variables , string between rotation (such can re-initialize view these members later), following:

protected void oncreate(bundle savedinstancestate) {      super.oncreate(savedinstancestate);      setcontentview(r.layout.activity_eight);      if(savedinstancestate != null) {          // restore our member variables represent activity state right here passed in bundle.          _x = savedinstancestate.getint("myapp.x", 0);         _y = savedinstancestate.getint("myapp.y", 0);         _name = savedinstancestate.getstring("myapp.name", "player");          // not shown - initializing view elements initialized member variables.      } ......  @override public void onsaveinstancestate(bundle savedinstancestate) {     // save our activity state adding our member variables represent activity state bundle.    savedinstancestate.putint("myapp.x", _x);    savedinstancestate.putint("myapp.y", _y);    savedinstancestate.putstring("myapp.name", _name);      // call parent method *after* have saved state    super.onsaveinstancestate(savedinstancestate); } 

bundle supports arrays of simple types.