ProgressDialog in Android Example With Thread Concept

This is Program is used for seperate thread , which is execute ProgressDialog Box........


program1 : MainActivity.java
package com.example.progressdialogdemo;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.app.Activity;
import android.app.ProgressDialog;
import android.util.Log;
import android.view.Menu;
import android.widget.Toast;

public class MainActivity extends Activity {

    private ProgressDialog dialog ;
    private Handler myhandler ;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
       
        showProgressbar();
        new Thread(new Runnable() {
           
            @Override
            public void run() {

                SecondClass obj = new SecondClass(myhandler,dialog);
                obj.doWork();
               
            }
        }).start();
       
       
       
    }

    private void showProgressbar() {
        dialog = new ProgressDialog(MainActivity.this);
        dialog.setProgressStyle(ProgressDialog.STYLE_SPINNER) ;
        dialog.setTitle("Data Sending To Server");
        dialog.setMessage("Loading..Wait..Till It Send..");
        //dialog.show();
        dialog.setCancelable(false);
        dialog.show();
       
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

}
program 2 : SecondClass.java
package com.example.progressdialogdemo;

import android.app.ProgressDialog;
import android.os.Handler;

public class SecondClass {

    private ProgressDialog dialog ;
    private Handler hand ;
   
   

    public SecondClass(Handler myhandler, ProgressDialog dialog2) {
       
        hand = myhandler ;
        dialog = dialog2 ;
    }



    public void doWork() {

           
            dialog.show();
           
       
    }

}

xml part :
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

</RelativeLayout>