ConcurrentModificationException while Modifying an ArrayList During Iteration

The reported exception is a ConcurrentModificationException, originating from the attempt to modify an ArrayList, mElements, while iterating over it.

Inside an OnTouchEvent處理程序，使用迭代器對融合的融合有一個循環迭代以檢查特定條件：

for (Iterator it = mElements.iterator(); it.hasNext();){
    Element element = it.next();

    // Check element's position and other conditions...

    if(element.cFlag){
        mElements.add(new Element("crack",getResources(), (int)touchX,(int)touchY)); // ConcurrentModificationException occurs here
        element.cFlag = false;
    }
}

Alternative Approach:

Another approach is to use an enhanced for-each loop, which iterates over a copy of the list, preventing ConcurrentModificationException: