php - Get a array from MySQL to android -

i have made php code array of data mysql struggling android , toast it.

here php code:

if($_server['request_method']=='get'){      $user_id  = $_get['user_id'];      require_once('dbconnect.php');      $user_tags = array();             foreach ($_request['user_id'] $key => $val) {            $user_tags[$key] = filter_var($val, filter_sanitize_string);             }             $user_ids = "'" . implode("','", $user_tags) . "'";             $sql = "select * user_tags user_id in ({$user_ids})";      $r = mysqli_query($con,$sql);  //creating blank array  $result = array();  //looping through records fetched  while($row = mysqli_fetch_array($r)){      $result['tags'][] = $row['tags'];           }  //displaying array in json format  echo json_encode(array('result'=>$result));  mysqli_close($con); } 

here url code:"http://allwaysready.16mb.com/cuboid/tagstest.php?user_id[]=7"

here result php code: {"result":{"tags":["pascol","php","python"]}}

i want "result" toasted in android.

here android code:

 public class jobs extends appcompatactivity {  public static string tags;  private string json_string; public static final string tag_json_array="result"; public static final string key_user_tags="tags"; public static final string url_get_tag =   "http://allwaysready.16mb.com/cuboid/tagstest.php?user_id[]="; @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_jobs);       getjson();      toast.maketext(getapplicationcontext(),tags,toast.length_long).show();   }  private void showemployee() {     jsonobject jsonobject = null;     arraylist<hashmap<string, string>> list = new arraylist<hashmap<string, string>>();     try {         jsonobject = new jsonobject(json_string);         jsonarray result = jsonobject.getjsonarray(tag_json_array);          (int = 0; < result.length(); i++) {             jsonobject jo = result.getjsonobject(i);             tags = jo.getstring(key_user_tags);              hashmap<string, string> employees = new hashmap<>();             employees.put(key_user_tags, tags);          }      } catch (jsonexception e) {         e.printstacktrace();     } }  private void getjson(){     class getjson extends asynctask<void,void,string>{          progressdialog loading;         @override         protected void onpreexecute() {             super.onpreexecute();             loading = progressdialog.show(jobs.this,"fetching data","wait...",false,false);         }          @override         protected void onpostexecute(string s) {             super.onpostexecute(s);             loading.dismiss();             json_string = s;             showemployee();         }          @override         protected string doinbackground(void... params) {             requesthandler rh = new requesthandler();             string s = rh.sendgetrequest(url_get_tag);             return s;         }     }     getjson gj = new getjson();     gj.execute(); } 

but blank toast . me guys if had made mistakes.

modify showemployee this:

private void showemployee() {     jsonobject jsonobject = null;     arraylist<hashmap<string, string>> list = new arraylist<hashmap<string, string>>();     try {         jsonobject = new jsonobject(json_string);         jsonobject result = jsonobject.getjsonobject(tag_json_array);         jsonarray jsontags = result.getjsonarray(key_user_tags);          (int = 0; < jsontags.length(); i++) {             tags = tags + jsontags.getstring(i);              hashmap<string, string> employees = new hashmap<>();             employees.put(key_user_tags, jsontags.getstring(i));          }      } catch (jsonexception e) {         e.printstacktrace();     } } 

and set tags string empty string (else first object null)

   public static string tags = ""; 

the code still has logic flaws, employees hashmap contain last entry, because creating new hashmap.