MultiChoiceModeListener Android -

i want delete images gridview , works fine multichoicemodelistener , when select pictures want delete , want make images blue on margins , , blue on images . (like in android gallery , after longclick on random photo).thanks!

  public class multichoicemodelistener implements         gridview.multichoicemodelistener {       @override     public void onitemcheckedstatechanged(android.view.actionmode mode, int position, long id, boolean checked) {            int selectcount = grid.getcheckeditemcount();           sparsebooleanarray checkeditempositions = grid.getcheckeditempositions();          int itemcount = grid.getcount();           switch (selectcount) {             case 1:                 mode.setsubtitle("one picture selected");                  break;             default:                 mode.setsubtitle("" + selectcount + " pictures selected");                 break;         }     }      @override     public boolean oncreateactionmode(android.view.actionmode mode, menu menu) {         mode.settitle("select pictures");         mode.setsubtitle("one picture selected");            return true;      }      @override     public boolean onprepareactionmode(android.view.actionmode mode, menu menu) {         return true;     }      @override     public boolean onactionitemclicked(android.view.actionmode mode,    menuitem item) {         return true;     }      @override     public void ondestroyactionmode(android.view.actionmode mode) {      } }  @override public boolean onmenuitemselected(int featureid, menuitem item) {     switch (item.getitemid()) {         case r.id.action_add:               // choose picture gallery             intent photopickerintent = new intent(intent.action_pick,    android.provider.mediastore.images.media.external_content_uri);             file picturedirectory =   environment.getexternalstoragepublicdirectory(environment.directory_pictures);             string picturedirectorypath = picturedirectory.getpath();             uri data = uri.parse(picturedirectorypath);             photopickerintent.setdataandtype(data, "image/* video*/");               startactivityforresult(photopickerintent,                     request_code_external_image);              break;         case r.id.action_delete:               file filepath = environment.getexternalstoragedirectory();              sparsebooleanarray checkeditempositions =    grid.getcheckeditempositions();              int itemcount = grid.getcount();               (int = itemcount - 1; >= 0; i--) {                 if (checkeditempositions.get(i)) {                      file dir5 = new file(filepath.getabsolutepath()                             + namealbum + filenamestrings[i]);                      file file3 = new file(string.valueof(dir5));                     deleted = file3.delete();                     }                   }             if(deleted==true) {                  checkeditempositions.clear();   finish();                 intent intent = new intent(this, albumactivity.class);                 intent.putextra("namealbum",namealbum);                 intent.putextra("namealbum2",namealbum2);                 startactivity(intent);               }else {                 alertdialog.builder builder = new   alertdialog.builder(albumactivity.this);                 builder.setmessage("keep hold on picture until can  select pictures delete!");                 builder.settitle("error!");                 builder.setcancelable(false);                 builder.setneutralbutton("ok", new   dialoginterface.onclicklistener() {                     @override                     public void onclick(dialoginterface dialog, int which) {                         dialog.dismiss();                      }                 });                 alertdialog dialog = builder.create();                 dialog.show();             }         break;               }             return super.onmenuitemselected(featureid, item);      } 

edit :

<selector xmlns:android="http://schemas.android.com/apk/res/android" > <item     android:state_activated="true"     android:drawable="@color/md_blue_400"/> <item android:state_pressed="true"     android:drawable="@color/md_black_1000_50" />   </selector> 

and selector you'll use background imageview in gridview !! , think work out things you!

i solved problem selector , if you're using multichoice listener on gridview , have make selector in drawble folder , , put bacground file gridview_item !! hope helps someone