将Radiobutton添加到RadioGroup，RadioButton是来自另一个Activity的项目

Question

我试图将自动生成的单选按钮放入无线电组并尝试格式化。我有一个额外的活动，有一个单选按钮，我可以格式化单个单选按钮。我找不到另一种方法来改变x app:buttonTint="@android:color/holo_green_light"。 这是我的示例代码：

1: Radiogroup group;

2. group = (RadioGroup)findViewById(R.id.radiogroup);

3: LayoutInflater layoutInflater = (LayoutInflater) getBaseContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);

4: final View item = layoutInflater.inflate(R.layout.testactivity, null);

5: RadioButton addradiobutton = (RadioButton)item.findViewbyId(R.id.rb_from_other_activity);

6: group.addView(addradiobutton);

程序在第6行崩溃。我不确定，但我猜addradiobutton不是“真正的”RadioButton。

以下是第6行的致命异常：

java.lang.RuntimeException: Unable to start activity ComponentInfo{de.user.name.app/de.user.project.app.activity}: java.lang.IllegalStateException: 
The specified child already has a parent. You must call removeView() on the child's parent first....
Caused by: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.