public int getViewDragState() {
        return mDragState;
    }
Retrieve the current drag state of this helper. This will return one of
{@link #STATE_IDLE}, {@link #STATE_DRAGGING} or {@link #STATE_SETTLING}.
@return The current drag state
app/src/main/java/home/smart/fly/animations/widget/slidepanel/ViewDragHelper.java