java - How to add values to a ListView in other activity? -


in app have contains button named "add favorites", when click on button, want send values in activity, values i'm trying add retrieved , can help?

this have:

.setnegativebutton("favoritos",new dialoginterface.onclicklistener(){ public void onclick(dialoginterface dialog,int which){          int position=(int)marker.gettag();         final listview listreprfav=(listview)findviewbyid(r.id.listafavrepresentantes);             listadapter adapterreprfav=new simpleadapter(             (mapsactivity.this),             listarepresentantes,             r.layout.list_item_representantes_fav,             new string[]{listaoportunidades.get(position).get("designacao"),listaoportunidades.get(position).get("morada")},             new int[]{r.id.designacaoreprfav,r.id.cidade});          listreprfav.setadapter(adapterreprfav);         } }

first create global class keep context of listview activity.

public class global extends application {     context context; }

then need create public method in activity contains listview:

public class listviewactivity extends activity {      public list<string> listitems;     public arrayadapter<string> adapter;      @override     protected void oncreate(bundle savedinstancestate) {         ....          global.context = this; //set context in global.          listview listview = (listview) findviewbyid(r.id.listview1);          adapter = new arrayadapter<string>         (this, android.r.layout.simple_list_item_1, android.r.id.text1,          listitems);           listview.setadapter(adapter);     }      //this method add new string listitems array ,      //notifies adapter changes.     public void additemandrefreshlistview(string[] newitems){         for(int = 0; i<newitems.length; i++){             listitems.add(newitem);         }         adapter.notifydatasetchanged();     }  }

after that, in onclick of dialog button:

.setnegativebutton("favoritos",new dialoginterface.onclicklistener(){     public void onclick(dialoginterface dialog,int which){         if(global.context != null){             ((listviewactivity) global.context).additemandrefreshlistview(values);         }     } }

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