如何获取掉落对象的ID？

Question

I'm creating some ImageViews dynamically. I want to know which object is dropped. Please take a look at the line:

Toast.makeText(getApplicationContext(), "You've passed the card", Toast.LENGTH_SHORT).show();

In this place I want to know what I've dropped (ID of ImageView would be great). How to get it?

 private final class MyTouchListener implements View.OnTouchListener {

    // called when the item is long-clicked
    @Override
    public boolean onTouch(View view, MotionEvent event) {
        // TODO Auto-generated method stub

        // create it from the object's tag
        ClipData.Item item = new ClipData.Item((CharSequence)view.getTag());

        String[] mimeTypes = { ClipDescription.MIMETYPE_TEXT_PLAIN };
        ClipData data = new ClipData(view.getTag().toString(), mimeTypes, item);
        View.DragShadowBuilder shadowBuilder = new View.DragShadowBuilder(view);

        view.startDrag( data, //data to be dragged
                shadowBuilder, //drag shadow
                view, //local data about the drag and drop operation
                0   //no needed flags
        );


        view.setVisibility(View.INVISIBLE);
        return true;
    }
}

class MyDragListener implements View.OnDragListener {
    Drawable normalShape = getResources().getDrawable(R.drawable.table);
    Drawable targetShape = getResources().getDrawable(R.drawable.hands);

    @Override
    public boolean onDrag(View v, DragEvent event) {

        // Handles each of the expected events
        switch (event.getAction()) {

            //drag shadow has been released,the drag point is within the bounding box of the View
            case DragEvent.ACTION_DROP:
                // if the view is the bottomlinear, we accept the drag item
                if (event.getX() > 500) {
                    Toast.makeText(getApplicationContext(), "You've passed the card", Toast.LENGTH_SHORT).show();
                }
                View view = (View) event.getLocalState();
                ViewGroup viewgroup = (ViewGroup) view.getParent();
                viewgroup.removeView(view);

                RelativeLayout containView = (RelativeLayout) v;
                containView.addView(view);
                view.setVisibility(View.VISIBLE);
                break;

            default:
                break;
        }
        return true;
    }
}

Answer 1

From the documenation here: http://developer.android.com/reference/android/view/View.OnDragListener.html

public abstract boolean onDrag (View v, DragEvent event)

Added in API level 11 Called when a drag event is dispatched to a view. This allows listeners to get a chance to override base View behavior.

Parameters

v : The View that received the drag event.
event : The DragEvent object for the drag event.

Returns true if the drag event was handled successfully, or false if the drag event was not handled. Note that false will trigger the View to call its onDragEvent() handler.

So when you do v.getId() , it is going to return the id of the view that the user started drag operation on. If this happens to be the ImageView , it will return the id of it, or else the id of the view the user is dragging.