set progress bar progress

progressbar_updating.java

// Start lengthy operation in a background thread
 new Thread(new Runnable() {
     public void run() {
         while (mProgressStatus < 100) {
             mProgressStatus = doWork();

             // Update the progress bar
             mHandler.post(new Runnable() {
                 public void run() {
                     mProgress.setProgress(mProgressStatus);
                 }
             });
         }
     }
 }).start();