/**
* 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.
*/
inflate(int resource, ViewGroup root, boolean attachToRoot)
view=inflater.inflate(R.layout.fragment1, null，false)的三个参数详解；
第一个参数：加载view的布局文件。
第二个参数：
1.参数为空的情况，xml里的根布局（也就是最外层布局），将不会被加载（xml文件的根布局会失效）；
2.不为空的情况，
系统会调用params = root.generateLayoutParams(attrs);//根据xml文件的宽，高 获取params
temp.setLayoutParams(params); 会把这个布局加载进去；也就是说xml文件的根布局不会失效；
第三个参数：
如果为true:
系统会调用：root.addView(temp, params); 会自动调用addview();
https://blog.csdn.net/dongpeng0314/article/details/51737899