Android Presentation Window Leaked -

i trying display activity on display(monitor) in android. problem occures in scenario when:
mainactivity going activity presentation , forth, after couple of these, disconnect cable connecting android device display application crashes. error not occur if randomly disconnect cable without entering activity many times.

error

06-27 14:35:32.403: e/windowmanager(21837): android.view.windowleaked: activity           com.example.doublescreen.newactivity has leaked window  com.android.internal.policy.impl.phonewindow$decorview{433b4970 v.e..... r.....i. 0,0- 1280,720} added here 06-27 14:35:32.403: e/windowmanager(21837):     @ com.example.doublescreen.newactivity.showpresentation(newactivity.java:48) 06-27 14:35:32.403: e/windowmanager(21837):     @ com.example.doublescreen.newactivity.oncreate(newactivity.java:39) 

presentation code:

public class pdfpresentation extends presentation { private context mctx; public pdfpresentation(context outercontext, display display) {     super(outercontext, display);     mctx = outercontext; }  protected void oncreate(bundle savedinstancestate) {     relativelayout layout = new relativelayout(mctx);     imageview imgv = new imageview(mctx);     imgv.setbackground(getresources().getdrawable(r.drawable.pic));     layout.addview(imgv);     setcontentview(layout); }; 

}

activity presentation

public class newactivity extends activity { private pdfpresentation mpresentation; private displaymanager displaymanager;  private final displaymanager.displaylistener mdisplaylistener =         new displaymanager.displaylistener() {     @override     public void ondisplayadded(int displayid) {      }      @override     public void ondisplaychanged(int displayid) {      }      @override     public void ondisplayremoved(int displayid) {         mpresentation.dismiss();     } };   @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_new);     displaymanager = (displaymanager) this.getsystemservice(context.display_service);     displaymanager.registerdisplaylistener(mdisplaylistener,null);      showpresentation(); }  private void showpresentation() {     display[] presentationdisplays = displaymanager.getdisplays(displaymanager.display_category_presentation);     if (presentationdisplays.length > 0) {         display display = presentationdisplays[0];         mpresentation = new pdfpresentation(this, display);         mpresentation.show();     } }  @override protected void onpause() {     super.onpause();     displaymanager.unregisterdisplaylistener(mdisplaylistener); } 

}

you need dismiss() presentation @ point, need dismiss() dialog. right now, calling show().