java - How to use the master detail flow theme with dynamic data? -

by creating new android project , selecting master detail flow theme, provide sample on how use theme, good. issue example uses static data , need dynamic. application uses async task data service in json format pars , save in phone db.

this dummycontent class:

public class dummycontent {      /**      * array of sample (dummy) items.      */ public static list<dummyitem> items = new arraylist<dummyitem>();  /**  * map of sample (dummy) items, id.  */ public static map<string, dummyitem> item_map = new hashmap<string, dummyitem>();  //  static { //      // add 3 sample items. //      additem(new dummyitem("1", "item 1")); //      additem(new dummyitem("2", "item 2")); //      additem(new dummyitem("3", "item 3")); //  }  public static void setcontext(context c) {     if (db == null) db = new mydbadapter(c); // sqliteopenhelper + sqlitedatabase manager     if (db.isopen() == false) {         db.open();         cursor c = db.getprofiles(); // database query         if (c.movetofirst()) {             {                 profileitem item = new profileitem(c.getstring(0), c.getstring(1),                     c.getstring(2));                 additem(item);             } while (c.movetonext());         }     } }  private static void additem(dummyitem item) {     items.add(item);     item_map.put(item.id, item); }  /**  * dummy item representing piece of content.  */ public static class dummyitem {     public string id;     public string content;      public dummyitem(string id, string content) {         this.id = id;         this.content = content;     }      @override     public string tostring() {         return content;     } } 

}

you can see commented static data , added "setcontext" should called add data db. issue , when should call function data show up? should call in "kind_name_listfragment.java" "oncreate" or "kind_name_detailfragment.java" "oncreate" or both (if both wont redundant) or somewhere else , there better solution?

my issue example uses static data , need dynamic

most straightforward way call dummycontent.setcontext(context) before accessing dummycontent.items:

(kind_name_listfragment.java) @override public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);      // call initialize dummycontent.items     dummycontent.setcontext(getactivity());      setlistadapter(new arrayadapter<dummycontent.dummyitem>(getactivity(),                                    android.r.layout.simple_list_item_activated_1,                                       android.r.id.text1, dummycontent.items));  } 

you need call dummycontent.setcontext(getactivity()) whenever need initialize/update/refresh items , item_map. perhaps, placing call items.clear() , item_map.clear() @ beginning of setcontext(context) when refreshing data.

should call in "kind_name_listfragment.java" "oncreate" or "kind_name_detailfragment.java" "oncreate" or both (if both wont redundant) or somewhere else

call once above in kind_name_listfragment.oncreate(bundle), before setlistadapter(...). no need call again in kind_name_detailfragment.oncreate(bundle). when need update/refresh data:

dummycontent.setcontext(getactivity()); ((youradapter)getlistadapter()).notifydatasetchanged();