android samsung note3 　device not found

descriptiong :

android samsung note3 　device not found

solution:

usb link by PTP, DONE!

(be curiosly: WHY NOT MTP??

notifyDataSetChanged

/**
* Notifies the attached observers that the underlying data has been changed
* and any View reflecting the data set should refresh itself.
*/
public void notifyDataSetChanged() {
mDataSetObservable.notifyChanged();
}