@Override
                public void onClick(View v) {
                    if (!isEnabled() || !isTouchEnabled()) return;
                    if (mSlideState != PanelState.EXPANDED && mSlideState != PanelState.ANCHORED) {
                        if (mAnchorPoint < 1.0f) {
                            setPanelState(PanelState.ANCHORED);
                        } else {
                            setPanelState(PanelState.EXPANDED);
                        }
                    } else {
                        setPanelState(PanelState.COLLAPSED);
                    }
                }
Set the draggable view portion. Use to null, to allow the whole panel to be draggable

@param dragView A view that will be used to drag the panel.
app/src/main/java/home/smart/fly/animations/widget/slidepanel/SlidingUpPanelLayout.java