java - Android: Limit drag & drop of object -

I have an activity I have a relative layout on this activity. On this layout I have placed several custom objects from a class Which extend the relational layout.
It looks like a chess (it's not, but so you know what I'm talking about).
Now I want to touch any one of this object and drag it into one of the 4 adjacent fields, swip it against it.
I thought Android Drag & amp; Drop

I used the setOnTouchListener and setOnDragListener for every object, so every object can be touched and dragged on to another object.
I used the tutorial, so you just have to read it compared to code, but here should be easy:

  @Override Public Boolean onTouch (see v, MotionEvent e) {If (e.getAction () == MotionEvent.ACTION_DOWN) {DragShadowBuilder shadowBuilder = New View.DragShadowBuilder (v); V.startDrag (faucet, shadowbilder, v, 0); Back true; } Other {return false; }} @Override Public Boolean OnDrag (v View DragEvent E) {if (e.getAction () == DragEvent.ACTION_DROP) {View View = (see) e.getLocalState (); ViewGroup = (ViewGroup) view.getParent (); From.removeView (see); MyCustomViewClass = (MyCustomViewClass) v; To.addView (see); View.setVisibility (View.VISIBLE); } Back true; }  

Now I am wondering how can I limit where an object can be removed. I want it to be able to be taken just to the adjacent areas (not only by limiting the draglistener, I also want to move objects beyond this, no matter how far the finger tries to drag) .
I hope what you say to me, if not, then please ask.
So the question is what can I do with this drag and amp; Do I think it can somehow find out where the finger is before falling? Is it possible to pull straight X and Y axis? Or is there a way of knowing the direction of the pulling movement, which gives me permission of 1) I know the object with which I will swap and 2) I would like to move other objects before drop, Is the object just swapping? >

Edit: I got the direction because I can calculate it from view.getX , view.getY and startobject DragEvent ACTION_ENTERED goes into v.getX and v.getY inDrag (the object I'm coords from). Now I try to figure out how to set the status of the dragshot to either object, I want to end it, or just drag it in my direction and drag the drag on the next object.
More help or ideas still appreciate.