android - select image from gridview and display it full screen -

i'm using ion library (from link) display image , videos phone in gridview. need image on clicking in gridview , display image in activity. would've used integer[position] , getitem() display image in full screen. how here when i'm using ion library?

public class mainactivity extends activity {     private myadapter madapter;     private gridview view;      // adapter populate , imageview url contained in array adapter     public class myadapter extends arrayadapter<string> {         public myadapter(context context) {             super(context, 0);         }          @override         public view getview(int position, view convertview, viewgroup parent) {             // see if need load more 40, otherwise populate adapter             if (position > getcount() - 4)                 loadmore();              if (convertview == null)                 convertview = getlayoutinflater().inflate(r.layout.image, null);              // find image view             final imageview iv = (imageview) convertview.findviewbyid(r.id.image);              // select image view             ion.with(iv)             .centercrop()             .placeholder(r.drawable.placeholder)             .error(r.drawable.error)             .load(getitem(position));              return convertview;         }     }      @override     public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);          ion.getdefault(this).configure().setlogging("ion-sample", log.debug);          setcontentview(r.layout.activity_main);          int cols = getresources().getdisplaymetrics().widthpixels / getresources().getdisplaymetrics().densitydpi * 2;         view = (gridview) findviewbyid(r.id.results);         view.setnumcolumns(cols);         madapter = new myadapter(this);         view.setadapter(madapter);          loadmore();          view.setonitemclicklistener(new onitemclicklistener(){              @override             public void onitemclick(adapterview<?> parent, view view,                     int position, long id) {                 // todo auto-generated method stub                 toast.maketext(mainactivity.this, madapter.getitem(position), toast.length_short).show();                  // here want give intent display image in full screen              }            });     }      cursor mediacursor;     public void loadmore() {         if (mediacursor == null) {             mediacursor = getcontentresolver().query(mediastore.files.getcontenturi("external"), null, null, null, null);         }          int loaded = 0;         while (mediacursor.movetonext() && loaded < 10) {             // media type. ion can show images both regular images , video.             int mediatype = mediacursor.getint(mediacursor.getcolumnindex(mediastore.files.filecolumns.media_type));             if (mediatype != mediastore.files.filecolumns.media_type_image                 && mediatype != mediastore.files.filecolumns.media_type_video) {                 continue;             }              loaded++;              string uri = mediacursor.getstring(mediacursor.getcolumnindex(mediastore.files.filecolumns.data));             file file = new file(uri);             // turn file uri if necessary/possible             if (file.exists())                 madapter.add(file.touri().tostring());             else                 madapter.add(uri);         }     } } 

      view.setonitemclicklistener(new onitemclicklistener(){              @override             public void onitemclick(adapterview<?> parent, view view,                     int position, long id) {                 // todo auto-generated method stub                 toast.maketext(mainactivity.this, madapter.getitem(position), toast.length_short).show();                  // here want give intent display image in full screen              intent = new intent(mainactivity.this, fullscreenviewactivity.class);             i.putextra("fullimagepath", madapter.get(position));             mainactivity.this.startactivity(i);              }   

fullscreenviewactivity

     public class fullscreenviewactivity extends activity {                imageview fullimage;                  @override                     public void oncreate(bundle savedinstancestate) {                         super.oncreate(savedinstancestate);                          ion.getdefault(this).configure().setlogging("ion-sample", log.debug);                          setcontentview(r.layout.activity_main);                         string s = getintent().getstringextra("fullimagepath");                        fullimage = (imageview) findviewbyid(r.id.fullimage);                   ion.with(fullimage)                 .centercrop()                 .placeholder(r.drawable.placeholder)                 .error(r.drawable.error)                 .load(s); }}