android - How to detect movement to the left, right, up and down -


i wonder if it's possible use ontouch method below detect if user moving finger left, right, och down on screen. have grid objects , want user able move 1 of object in 4 directions.

my idea use action_down event x , y position , check objects in list see object whitin x , y value. using action_move start moving in 1 of directions.

    @override public boolean ontouch(view v, motionevent event) {      switch (event.getaction()) {      case motionevent.action_down:         log.i("test","down");         break;      case motionevent.action_pointer_up:          break;      case motionevent.action_move:         log.i("test","move");         break;     } 

public class mainactivity extends activity { ... // example shows activity, use same approach if // subclassing view. @override public boolean ontouchevent(motionevent event){       int action = motioneventcompat.getactionmasked(event);      switch(action) {         case (motionevent.action_down) :             log.d(debug_tag,"action down");             return true;         case (motionevent.action_move) :             log.d(debug_tag,"action move");             return true;         case (motionevent.action_up) :             log.d(debug_tag,"action up");             return true;         case (motionevent.action_cancel) :             log.d(debug_tag,"action cancel");             return true;         case (motionevent.action_outside) :             log.d(debug_tag,"movement occurred outside bounds " +                     "of current screen element");             return true;               default :              return super.ontouchevent(event);     }       }

for more details see this link, can use (and recommend that) onfling() of gesturedetector example of visit this link...


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