在android应用程序中更新ip地址的能力

我正在研究一个与web应用程序交谈的android应用程序我在本地运行Rest服务器但是如果我的服务器ip更改或端口更改，我必须构建应用程序有没有解决方案使IP地址更新自己？这是我的代码，即可获得我的web服务在android应用程序中更新ip地址的能力

public class TableauDeBordFragment extends Fragment { 


public static final String SERVEL_URL = "http://192.168.2.120:8082/access-control-web/rest/roles/attendance"; 

List<Employe> employes; 
ListView tableauDeBordListview; 

@Nullable 
@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 

    employes = new ArrayList<Employe>(); 
    View view = inflater.inflate(R.layout.fragment_tableau_de_bord, container, false); 
    tableauDeBordListview = (ListView) view.findViewById(R.id.tableaudebordlist); 
    DownloadJSON downloadJSON = new DownloadJSON(); 
    downloadJSON.execute(); 
return view; 
} 

public class DownloadJSON extends AsyncTask<Void, Void, Void> { 

    @Override 
    protected Void doInBackground(Void... params) { 
     try { 
      URL theURL = new URL(SERVEL_URL); 
      BufferedReader reader = new BufferedReader(new InputStreamReader(theURL.openConnection().getInputStream(), "UTF-8")); 

      String jsonStr = reader.readLine(); 
      JSONArray jsonArray = new JSONArray(jsonStr); 
      for (int i=0;i<jsonArray.length();i++) 
      { 
       JSONObject jsonAttendanceItem = jsonArray.getJSONObject(i); 
       JSONObject jsonEmployeeItem = jsonAttendanceItem.getJSONObject("employee"); 
       Employe employe = new Employe(); 
       employe.setFirstName(jsonEmployeeItem.getString("firstName")); 
       employe.setLastName(jsonEmployeeItem.getString("lastName")); 
       employe.setPhoneNumber(jsonEmployeeItem.getString("phoneNumber")); 
       employes.add(employe); 
      } 
      } catch (MalformedURLException e) { 
      e.printStackTrace(); 
     } catch (UnsupportedEncodingException e) { 
      e.printStackTrace(); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } catch (JSONException e) { 
      e.printStackTrace(); 
     } 


     return null; 
    } 

    @Override 
    protected void onPostExecute(Void aVoid) { 
     super.onPostExecute(aVoid); 


     ArrayAdapter<Employe> adapter = new TableDeBordCustum(getActivity(), employes); 
     tableauDeBordListview.setAdapter(adapter); 

    } 
}

}

来源

2016-07-03 Nizar Abdelhedi