java - How can I get data from Azure Mobile services -

i trying data azure ms sql database azure mobile services. wrote code below when call method returns null. doing wrong? query should use?

private void refreshnumsfromtable() {       new asynctask<void, void, void>() {         @override         protected void doinbackground(void... params) {             try {                  runonuithread(new runnable() {                     @override                     public void run() {                          mphonestable.where().field("phonenumber").execute(new tablequerycallback<phonenumbers>() {                              @override                             public void oncompleted(final list<phonenumbers> result, int count,exception exception, servicefilterresponse response)                              {                                  runonuithread(new runnable() {                                     @override                                     public void run() {                                         madapter.clear();                                         for(phonenumbers num : result)                                         {                                             madapter.add(num);                                         }                                     }                                 });                              }                         });                     }                 });              } catch (exception e) {                 createandshowdialog(e, "error");             }              return null;         }     }.execute();  } 

you don't have complete predicate there. using where() method, you're asking results phonenumber meets criterion, aren't specifying criterion. need it's equal (eq()) or starts string:

mphonestable.where().field("phonenumber").eq("555-555-5555").execute().get(); or mphonestable.where().startswith("phonenumber", "555").execute().get();

if you're trying return phonenumber column, use select() method:

mtodotable.select("phonenumber").execute().get();

for more information, please see mobile services android sdk reference: https://azure.microsoft.com/en-us/documentation/articles/mobile-services-android-how-to-use-client-library/#querying