java'指定的子级已具有父级。您必须首先对子级的父级调用removeView（）不知道我错在哪里

Question

这是我的数字活动代码摘录： 注：“words”是一个字符串类型的“ArrayList”，元素范围从“1-10”到“size=9”

// Find the root view of the Numbers activity
   LinearLayout rootViewNumbers = findViewById(R.id.root_numbers_LL);

// creating a text view to assign the words to it
   TextView wordView = new TextView(this);

for(int i = 0; i <= words.size(); i++) {

            // setting the text to text view by using the 'i' for index position iterator
            wordView.setText(words.get(i));

            // setting the text view to the root view
            rootViewNumbers.addView(wordView);
        }

当我运行应用程序时，我得到的错误是

'The specified child already has a parent. You must call removeView() on the child's parent first.'

我的理解是，我们已经声明了一个文本视图，现在我们正在循环添加'words'ArrayList的元素，并将文本视图添加到根视图。请帮帮我，我哪里做错了

Answer 1

如果在for循环中声明TextView，则每次迭代都会向RootViewNumber添加一个新的视图实例，同时代码会尝试向引发异常的父级添加相同的视图实例

您可以将代码编辑为：

 TextView wordView;

 for(int i = 0; i <= words.size(); i++) {

        wordView = new TextView(this)

        // setting the text to text view by using the 'i' for index position iterator
        wordView.setText(words.get(i));

        // setting the text view to the root view
        rootViewNumbers.addView(wordView);
    }