android - Out of memory, showing AlertDialog and making changes in orientation -

i have activity containing 2 imagebuttons. if user clicks alertdialog shown. while alert shown, if orientation changed , forth few times application crashes message:

error/dalvikvm-heap(10988): 3363556-byte external allocation large process. error/dalvikvm(10988): out of memory: heap size=4935kb, allocated=2594kb, bitmap size=19579kb error/graphicsjni(10988): vm won't let allocate 3363556 bytes 

if alertdialog not there, application doesn't crash.

public class startpageview extends activity implements onclicklistener, android.content.dialoginterface.onclicklistener {     private static final string tag = "startpageview";     private imagebutton vacbutton;     private imagebutton sickbutton;     private alertdialog alert;     private static boolean alertdismissedbylifecycle = false;   @override public void oncreate(bundle savedinstancestate)  {     super.oncreate(savedinstancestate);     setcontentview(r.layout.startpage);      vacbutton = (imagebutton)findviewbyid(r.id.gotovac_btn);     vacbutton.setonclicklistener(this);      sickbutton = (imagebutton)findviewbyid(r.id.gotosick_btn);     sickbutton.setonclicklistener(this);       if(alertdismissedbylifecycle)     {         alertdismissedbylifecycle = false;         showalert();     } }  @override protected void onstop()  {     if(alert != null && alert.isshowing())     {         alertdismissedbylifecycle = true;         alert.dismiss();     }     super.onstop(); }  //go vacation view or sick view  //user clicked on vacview button or sickview button @override public void onclick(view v)  {     if(v.equals(this.vacbutton))     {          intent = new intent(this, vacationleaveview.class);          startactivity(i);     }     if(v.equals(this.sickbutton))     {          intent = new intent(this, sickleaveview.class);          startactivity(i);      }  }   //log out  //user pressed button @override public void onbackpressed()  {     showalert(); } //onclicklistener logging out warning @override public void onclick(dialoginterface dialog, int which)  {     if(which == dialoginterface.button_positive)     {         maincontroller.getinstance().clearallchildren();         dialog.cancel();         this.finish();     }     else         dialog.cancel(); }  //dialog  private void showalert() {     if(alert == null)     {         alertdialog.builder alertdialog = new alertdialog.builder(this);          alertdialog.setmessage("vill du logga ut från förskoleportalen?");         alertdialog.setpositivebutton("ja", this);         alertdialog.setnegativebutton("nej", this);          alert = alertdialog.create();          // title alertdialog         alert.settitle("logga ut");     }      alert.show(); } 

your context of "this" cause. need explicitly specify context avoid issue. issue discussed here: avoiding memory leaks

the problem ... when add images inside activity context of "this" , change orientation image gets passed along else "this" oncreate() method part of bundle. on , on again , end 1 image per orientation change in memory. android documentation speaks verbatim.