onDrag.java

	@Override
	public boolean onDrag(View view, DragEvent dragEvent) {
		Log.d("dragEvent", dragEvent.toString());
		switch (dragEvent.getAction()) {
			case DragEvent.ACTION_DRAG_ENDED:
				Log.d("event", "ACTION_DRAG_ENDED");
				dragLayout.setVisibility(View.GONE);
				dragLayout.setBackgroundResource(R.drawable.drag_background);
				return true;
			case DragEvent.ACTION_DRAG_ENTERED:
				Log.d("event", "ACTION_DRAG_ENTERED");
				dragLayout.setBackgroundResource(R.drawable.drag_background_active);
				return true;
			case DragEvent.ACTION_DRAG_EXITED:
				Log.d("event", "ACTION_DRAG_EXITED");
				dragLayout.setBackgroundResource(R.drawable.drag_background);
				return true;
			case DragEvent.ACTION_DRAG_LOCATION:
				Log.d("event", "ACTION_DRAG_LOCATION");
				return true;
			case DragEvent.ACTION_DRAG_STARTED:
				Log.d("event", "ACTION_DRAG_STARTED");
				dragLayout.setVisibility(View.VISIBLE);
				return true;
			case DragEvent.ACTION_DROP:
				Log.d("event", "ACTION_DRAG_DROP");
				handleDropEvent(view, dragEvent);
				return true;
			default:
				Log.e("event", "unknown");
		}

		return false;
	}