Getting the content of a variable from php to android and display it using Toast class -

i want content of variable php android , display using toast class. wrote following codes , if 1 or both fields empty, register.php file prints $isempty , java code should content of $isempty variable , if(text == "isempty") result toast class should display r.string.empty. program using following codes can not display r.string.empty using toast class.

public class mainactivity extends activity {     edittext username, password;     button register;   string name, pass;     @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);     username = (edittext) findviewbyid(r.id.edittext);         password= (edittext) findviewbyid(r.id.edittext2);         register= (button) findviewbyid(r.id.register);         register.setonclicklistener(new view.onclicklistener() {             @override             public void onclick(view view) {                 try{                      // call gettext method make post method call                     gettext();                 }                 catch(exception ex)                 {                  }             }         });     }      public  void  gettext()  throws unsupportedencodingexception     {         // user defined values         name = username.gettext().tostring();         pass   = password.gettext().tostring();           // create data variable sent values server          string data = urlencoder.encode("username", "utf-8")                 + "=" + urlencoder.encode(name, "utf-8");          data += "&" + urlencoder.encode("password", "utf-8") + "="                 + urlencoder.encode(pass, "utf-8");          string text = "";         bufferedreader reader=null;          // send data         try         {              // defined url  send data             url url = new url("http://127.0.0.1:8080/apps/register.php");              // send post data request              urlconnection conn = url.openconnection();             conn.setdooutput(true);             outputstreamwriter wr = new outputstreamwriter(conn.getoutputstream());             wr.write( data );             wr.flush();              // server response              reader = new bufferedreader(new inputstreamreader(conn.getinputstream()));             stringbuilder sb = new stringbuilder();             string line = null;              // read server response             while((line = reader.readline()) != null)             {                 // append server response in string                 sb.append(line + "\n");             }               text = sb.tostring();         }         catch(exception ex)         {          }                 {             try             {                  reader.close();             }              catch(exception ex) {}         }          // show response on activity         if(text == "isempty")         { string isempty = (string)gettext(r.string.empty);             toast.maketext(getapplicationcontext(), isempty, toast.length_long).show(); }      }     @override     public boolean oncreateoptionsmenu(menu menu) {         // inflate menu; adds items action bar if present.         getmenuinflater().inflate(r.menu.main, menu);         return true;     }} 

and

 <?php if($_server["request_method"] == "post") {  $username = urldecode($_post['username']); $login = urldecode($_post['login']); if(empty($username) || empty($login)) {         $isempty = "isempty"; print "$isempty"; } }?> 

using

if(text == "isempty") incorrect

you have use

if(text.equals("isempty")) in java