**Am working on an android app in which there are list of activites.while launching any activity its talking sometime.So m thinking to include the progess bar till the next activity launched.**

I have gone through a lot of question on progress bar but m not getting the exact solution.So,can any one suggest me the best way to integrate progress bar in my App.

I am Sharing My code and the logCat its not working.

```
  package com.example.progress;

  import android.app.Activity;
  import android.app.ProgressDialog;
  import android.content.Intent;
  import android.os.Bundle;
  import android.view.Menu;
  import android.view.MenuItem;
  import android.view.View;
  import android.view.View.OnClickListener;
  import android.widget.Button;

  public class MainActivity extends Activity {

  private ProgressDialog progress;
  Button Button;

    @Override
    protected void onCreate(Bundle savedInstanceState) 
    {
     progress = new ProgressDialog(MainActivity.this);
     Button=(Button)findViewById(R.id.button1);

      Button.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
             switch (v.getId()) {
                case R.id.button1:
                     progress.setMessage("Please Wait Loading...");
               progress.setProgressStyle(ProgressDialog.STYLE_SPINNER);
               progress.setIndeterminate(true);
            progress.show();
             new Thread() 
             {

                 public void run() 
                 {

                     Intent i = new Intent(MainActivity.this,Second.class);
                     startActivity(i);
                     progress.dismiss();
                 }

             }.start();

                    break;
        }

        }
    });
    }
}

  LOgCat Error :::
  -----------   

       01-27 17:23:19.094: D/AndroidRuntime(13666): Shutting down VM
       01-27 17:23:19.095: E/AndroidRuntime(13666): FATAL EXCEPTION: main
       01-27 17:23:19.095: E/AndroidRuntime(13666): Process: com.example.progress, PID:  13666
       01-27 17:23:19.095: E/AndroidRuntime(13666): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.progress/com.example.progress.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference
        01-27 17:23:19.095: E/AndroidRuntime(13666):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2339)
        01-27 17:23:19.095: E/AndroidRuntime(13666):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2413)
      01-27 17:23:19.095: E/AndroidRuntime(13666):  at android.app.ActivityThread.access$800(ActivityThread.java:155)
      01-27 17:23:19.095: E/AndroidRuntime(13666):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1317)
      01-27 17:23:19.095: E/AndroidRuntime(13666):  at android.os.Handler.dispatchMessage(Handler.java:102)
      01-27 17:23:19.095: E/AndroidRuntime(13666):  at android.os.Looper.loop(Looper.java:135)
     01-27 17:23:19.095: E/AndroidRuntime(13666):   at android.app.ActivityThread.main(ActivityThread.java:5343)
     01-27 17:23:19.095: E/AndroidRuntime(13666):   at java.lang.reflect.Method.invoke(Native Method)
      01-27 17:23:19.095: E/AndroidRuntime(13666):  at java.lang.reflect.Method.invoke(Method.java:372)
      01-27 17:23:19.095: E/AndroidRuntime(13666):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:907)
      01-27 17:23:19.095: E/AndroidRuntime(13666):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:702)
      01-27 17:23:19.095: E/AndroidRuntime(13666): Caused by:   java.lang.NullPointerException: Attempt to invoke virtual method 'void  android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference
       01-27 17:23:19.095: E/AndroidRuntime(13666):     at com.example.progress.MainActivity.onCreate(MainActivity.java:22)
       01-27 17:23:19.095: E/AndroidRuntime(13666):     at android.app.Activity.performCreate(Activity.java:6010)
       01-27 17:23:19.095: E/AndroidRuntime(13666):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1129)
      01-27 17:23:19.095: E/AndroidRuntime(13666):  at      android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2292)
       01-27 17:23:19.095: E/AndroidRuntime(13666):     ... 10 more

```