android - Image does not maintain x,y coordinates during drag and drop -

i trying set drag , drop functionality imageview onlongclick. issue noticing dragevent.action_drag_exited, received x , y cords event change last dragevent.action_drag_location coordinates. causes draggable imageview move (or jump) after have dropped it. here implementation.

first setup onlongclicklistener on object (imageview) want drag around:

ivdrag.setonlongclicklistener(new view.onlongclicklistener() {             @override             public boolean onlongclick(view v) {                 clipdata.item item = new clipdata.item((charsequence)v.gettag());                 string[] mimetypes = {clipdescription.mimetype_text_plain};                 clipdata dragdata = new clipdata(v.gettag().tostring(),                 mimetypes, item);                 dragshadowbuilder mshadow = new dragshadowbuilder(v);                 v.startdrag(dragdata, mshadow, v, 0);                  dragview.setondraglistener(draglistener);                 return true;             }         }); 

i set ondraglistener on object (imageview) want drag around:

    ivdrag.setondraglistener(new ondraglistener() {          @override          public boolean ondrag(view v, dragevent event) {          // todo auto-generated method stub          switch (event.getaction()) {          case dragevent.action_drag_started:              layoutparams = (relativelayout.layoutparams) v.getlayoutparams();              logger.i(tag, "action dragevent.action_drag_started");              ivdrag.setvisibility(view.invisible);              break;                    case dragevent.action_drag_entered:              containdragable = true;              logger.i(tag, "action dragevent.action_drag_entered");              x_cord = (int) event.getx();              y_cord = (int) event.gety();              logger.i(tag, "x_cord: " + x_cord + " //y_cord: " + y_cord);                 break;                case dragevent.action_drag_exited:              containdragable = false;              logger.i(tag, "action dragevent.action_drag_exited");              x_cord = (int) event.getx(); // removing line allows correct cords              y_cord = (int) event.gety(); // removing line allows correct cords              logger.d(tag, "x_cord: " + x_cord + " //y_cord: " + y_cord);               // below re-positions drag object              layoutparams.leftmargin = x_cord;              layoutparams.topmargin = y_cord;              v.setlayoutparams(layoutparams);                      break;                case dragevent.action_drag_location:              logger.i(tag, "action dragevent.action_drag_location");              x_cord = (int) event.getx();              y_cord = (int) event.gety();              logger.i(tag, "x_cord: " + x_cord + " //y_cord: " + y_cord);              break;                    case dragevent.action_drag_ended :              logger.i(tag, "action dragevent.action_drag_ended");              // below makes sure image not disappear              ivdrag.post(new runnable() {                  @override                  public void run() {                      // todo auto-generated method stub                      logger.e(tag, "inside runnable");                      if (ivdrag.getvisibility() != view.visible) {                          ivdrag.setvisibility(view.visible);                      }                  }                     });                       break;          case dragevent.action_drop:              logger.i(tag, "action_drop event");              // nothing              break;          default:              break;          }          return true;          }     }); } 

note: commented above if remove update x,y cords dragevent.action_drag_exited, logs indicate correct coordinates. however, unable re-drag object after that.

lastly, create listener when have dragged object container.

private view.ondraglistener draglistener = new view.ondraglistener() {       @override      public boolean ondrag(view v, dragevent event) {             switch (event.getaction()) {         case dragevent.action_drag_started:             logger.v(tag, "drag started (ondrag)");             break;          case dragevent.action_drag_entered:             logger.v(tag, "drag entered (ondrag)");             break;          case dragevent.action_drag_exited:             logger.v(tag, "drag exited (ondrag)");             break;          case dragevent.action_drop:             logger.e(tag, "drop (ondrag)");             // handle drop              break;          case dragevent.action_drag_ended:             logger.v(tag, "drag ended (ondrag)");             break;          default:              return false;          }          return true;      }  }; 

what missing make work expected? in advance!