Android Network programming-thread and Handler (iii)

Client: thread and handler

Mainactivity.java

package com.example.justyu.login_demo;import android.app.activity;import  android.app.progressdialog;import android.os.handler;import android.os.message;import  Android.support.v7.app.actionbaractivity;import android.os.bundle;import android.view.view;import  android.widget.Button;import android.widget.EditText;import android.widget.Toast;import  Com.example.justyu.login_demo. Sercice.serviceexception;import com.example.justyu.login_demo. Sercice.userservice;import com.example.justyu.login_demo. sercice.userserviceimp;import java.lang.ref.weakreference;public class mainactivity  extends actionbaractivity implements view.onclicklistener{    private  edittext loginname,loginpassword;    private button loginbutton;     private  static final int login_success=1;     private&Nbsp; static final string  msg_login_error= "Login failed! ";     private  static final string  msg_login_success=" landed successfully! ";     public   static final string  msg_login_failed=" Login name or password error!! ";     private static progressdialog dialog;    //interface Implementation of   &NBSP;&NBSP;&NBSP;&NBSP;PRIVATE&NBSP;USERSERVICE&NBSP;USERSERVICE=NEW&NBSP;USERSERVICEIMP ();      @Override     protected void oncreate (bundle  savedinstancestate)  {        super.oncreate (savedInstanceState);         setcontentview (R.layout.activity_main);         loginname= (EditText) This.findviewbyid (r.id.edittext);         loginpassword= (EditText) This.findviewbyid (R.ID.EDITTEXT2);         loginbutton= (Button) This.findviewbyid ( R.id.button);         loginbutton.setonclicklistener (this);     }   //Click on the login button   after the action      @Override      Public void onclick (VIEW&NBSP;V)  {       final string  name=loginname.gettext (). toString (). Trim ();        final string  password=loginpassword.gettext (). toString (). Trim ();         /**          *  Login Verification           */        if (dialog==null) {             dialog=new progressdialog (mainactivity.this);             dialog.settitle ("Wait");             dialog.setmessage ("Log in .....") ");             dialog.setcancelable (True);             dialog.show ();         }        //Sub-thread          thread thread=new thread (new runnable ()  {              @Override              public void run ()  {                 try{                   userservice.userlogin (Name,password);                    //Send Message                     Handler.sendemptymessage (login_success);             }//Business logic Anomaly                  catch  (serviceexception e) {                     e.printstacktrace ();                     //Send Message                      message  msg=new message ();                     bundle data=new bundle ();                     data.putserializable ("Error_msg", E.getMessage ());                      msg.setdata (data);                     //passed the 0           .          handler.sendmessage (msg);                 }                 catch  (exception e) {                      E.printstacktrace ();                     //sending messages                      message msg=new message ();                     bundle data=new bundle ();                      Data.putserializable ("Error_msg", Msg_login_error);                     msg.setdata (data);                     //passed the 0  .                    Handler.sendmessage (msg);                }             }         });         thread.start ();    }     private void showtip (STRING&NBSP;STR) {         Toast.maketext (This,str,toast.length_short). Show ();    }    /**      *  communication between the main thread and the sub-threads  Handler     */    private static class myhandler extends handler{         private final WeakReference<Activity> myActivity;         public myhandler (mainactivity activity) {             myActivity=new WeakReference<Activity> (Activity);         }         @Override          public void handlemessage (message msg)  {             //can quote Mainactivity's              //  method Reference ((mainactivity) Myactivity.get ()) .             if (dialog!=null) {                 dialog.dismiss ();             }            int flag=msg.what;             switch  (flag) {                 case 0:                     string errormsg= (String) Msg.getdata (). Getserializable ("error_msg");                      ((mainactivity) Myactivity.get ()). Showtip (ERRORMSG);                      break;                 case login_success:                      ((mainactivity) Myactivity.get ()). Showtip (msg_login_success);                      break;                default:                     break;             }        }     }    private myhandler handler=new myhandler (this);}

Userservice.java

Package Com.example.justyu.login_demo. Sercice;

/**

* Created by Justyu on 2015/4/9.

*/

Public interface UserService {

public void Userlogin (String loginname,string Loginpassword) throws Exception;

}

Userserviceimp.java

Package com.example.justyu.login_demo. Sercice;import android.util.log;import com.example.justyu.login_demo. mainactivity;/** * created by justyu on 2015/4/9. */public class  userserviceimp implements userservice {     @Override      public void userlogin (String loginname, string loginpassword)  throws  EXCEPTION {        LOG.D ("Yu", LoginName);         LOG.D ("Yu", Loginpassword);         thread.sleep         //and server-side interaction          if (Loginname.equals ("1") &&loginpassword.equals ("1") {         }else{         throw  new serviceexception ( Mainactivity.msg_login_failed);         }    }} 

Android Network programming-thread and Handler (iii)