Fragment nested Viewpager After switching data disappears Viewpager blank problem

First describe the phenomenon

After resolving

Before the online to find a lot of solutions, some netizens said to inherit Fragmentstatepageradapter replace Fragmentpageradapter I tried to try not to work. Later in the resolution of the following
This method is initialized Viewpager

private   void  init  () {fragmentslist = new  arraylis        T ();        Manager = Getfragmentmanager ();        Fragmentslist = new  arraylist<fragment> ();        Apply = new  Applystatusfrag ();        Audit = new  Auditstatusfrag ();        Fragmentslist.add (apply);        Fragmentslist.add (audit); adapter = new  myfragpageradapter (Getchildfragmentmanager (), fragmentslist); //for Getfragmentmanager;;; toggle fragment again back to previous fragment data disappears  Mpager.setcurrentitem (        Span class= "Hljs-number" >0 );        Mpager.setadapter (adapter);    Radiogroup_status.check (r.id.rdbtn_apply); }

Getchildfragmentmanager replaced the Getfragmentmanager problem is solved. The concrete principle is what, waits for the study.
Getfragmentmanager to the manager of the included fragment, and if fragment nested fragment, then Getchildfragmentmanager () will be used.
Getfragmentmanager () is the fragment management of the parent container where the fragment is located,
Getchildfragmentmanager () is the fragment management of the sub-container inside the fragment.
Msectionspageradapter = new Sectionspageradapter (getactivity (). Getsupportfragmentmanager ());

In fragment nested fragment words, do not use the above sentence ... will appear in the Viewpager. Some fragment will not load the situation ... Both Viewpager loading Fragment blank pages ....

So fragment inside nested fragment words: Must use Getchildfragmentmanager ();

Msectionspageradapter = new Sectionspageradapter (Getchildfragmentmanager ());

Hereby mark

Fragment nested Viewpager After switching data disappears Viewpager blank problem