1.Activity动态调用代码
TitleFragement a = new TitleFragement();
getFragmentManager().beginTransaction().add(R.id.tt, a)
.commit();
异常信息：
The specified child already has a parent.
经分析：
对应Fragment代码：
View view = inflater.inflate(R.layout.titlefragement, container);
应改成：
View view = inflater.inflate(R.layout.titlefragement, container, false);
查看定义：
/**
* Inflate a new view hierarchy from the specified xml resource. Throws
* {@link InflateException} if there is an error.
*
* @param resource ID for an XML layout resource to load (e.g.,
* <code>R.layout.main_page</code>)
* @param root Optional view to be the parent of the generated hierarchy.
* @return The root View of the inflated hierarchy. If root was supplied,
* this is the root View; otherwise it is the root of the inflated
* XML file.
*/
public View inflate(int resource, ViewGroup root) {
return inflate(resource, root, root != null);
}
public View inflate(int resource, ViewGroup root, boolean attachToRoot)
/**
* Inflate a new view hierarchy from the specified xml resource. Throws
* {@link InflateException} if there is an error.
*
* @param resource ID for an XML layout resource to load (e.g.,
* <code>R.layout.main_page</code>)
* @param root Optional view to be the parent of the generated hierarchy (if
* <em>attachToRoot</em> is true), or else simply an object that
* provides a set of LayoutParams values for root of the returned
* hierarchy (if <em>attachToRoot</em> is false.)
* @param attachToRoot Whether the inflated hierarchy should be attached to
* the root parameter? If false, root is only used to create the
* correct subclass of LayoutParams for the root view in the XML.
* @return The root View of the inflated hierarchy. If root was supplied and
* attachToRoot is true, this is root; otherwise it is the root of
* the inflated XML file.
*/
root：需要附加到resource资源文件的根控件，什么意思呢，就是inflate()会返回一个 View对象，如果第三个参数attachToRoot为true，就将这个root作为根对象返回，否则仅仅将这个root对象的 LayoutParams属性附加到resource对象的根布局对象上，也就是将布局文件resource的布局参数转换为外层root可以接受的类 型，比如root是一个LinearLayout自己要转换的resource里面有layout_width=”fill_parent”,和 layout_height=”fill_parent”参数，但是这些参数没有外部环境，它们对应的对象都是 ViewGroup.LayoutParams对象，root参数让系统将ViewGroup.LayoutParams对象转换为 LinearLayout.LayoutParams对象。
attachToRoot：是否将root附加到布局文件的根视图上
用两个参数的，attachToRoot实际为true返回的是一个跟对象，用false的，可以添加到Activity上