2018-03-14工作日誌，判斷View完全顯示

 public boolean isViewCovered(final View view) {
View currentView = view;
Rect currentViewRect = new Rect();  
    boolean partVisible = currentView.getGlobalVisibleRect(currentViewRect);  
    boolean totalHeightVisible = (currentViewRect.bottom - currentViewRect.top) >= view.getMeasuredHeight();  
    boolean totalWidthVisible = (currentViewRect.right - currentViewRect.left) >= view.getMeasuredWidth();  
    boolean totalViewVisible = partVisible && totalHeightVisible && totalWidthVisible;  
    // if any part of the view is clipped by any of its parents,return true  
    if (!totalViewVisible)  
        return true;  
  
    while (currentView.getParent() instanceof ViewGroup) {  
        ViewGroup currentParent = (ViewGroup) currentView.getParent();  
        // if the parent of view is not visible,return true  
        if (currentParent.getVisibility() != View.VISIBLE)  
            return true;  
  
        int start = indexOfViewInParent(currentView, currentParent);  
        for (int i = start + 1; i < currentParent.getChildCount(); i++) {  
            Rect viewRect = new Rect();  
            view.getGlobalVisibleRect(viewRect);  
            View otherView = currentParent.getChildAt(i);  
            Rect otherViewRect = new Rect();  
            otherView.getGlobalVisibleRect(otherViewRect);  
            // if view intersects its older brother(covered),return true  
            if (Rect.intersects(viewRect, otherViewRect))  
                return true;  
        }  
        currentView = currentParent;  
    }  
    return false;  
    }  
              
    private int indexOfViewInParent(View view, ViewGroup parent) {  
    int index;  
    for (index = 0; index < parent.getChildCount(); index++) {  
        if (parent.getChildAt(index) == view)  
            break;  
    }  
    return index;  
    }