Android UI How to - Create Progress Bar with Builder

Question

We would like to know how to create Progress Bar with Builder.
Answer

The following class has methods to create a dialog with progress bar.
//from  ww w.  j ava 2  s .  c om
import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Toast;
public class Main {
  public static void displayToast(final Activity activity, final String text,
      final int duration) {
    activity.runOnUiThread(new Runnable() {

      public void run() {
        Toast toast = Toast.makeText(activity, text, duration);
        toast.show();

      }
    });
  }

  private static AlertDialog aDialog;
  private static AlertDialog.Builder aDialogBuilder;

  public static void showAlertDialog(final Activity activity,
      final String titel, final String text) {

    if (!activity.isFinishing()) {
      activity.runOnUiThread(new Runnable() {

        public void run() {
          aDialogBuilder = new AlertDialog.Builder(activity);
          aDialogBuilder.setMessage(text);
          aDialogBuilder.setTitle(titel);
          aDialogBuilder.setCancelable(false);
          aDialogBuilder.setPositiveButton("OK",
              new DialogInterface.OnClickListener() {

                public void onClick(DialogInterface dialog,
                    int which) {
                  dialog.cancel();

                }
              });
          aDialog = aDialogBuilder.create();
          aDialog.show();
        }
      });
    }

  }

  private static ProgressDialog pDialog;

  public static ProgressDialog startProgressBar(final Activity activity) {
    activity.runOnUiThread(new Runnable() {

      public void run() {
        // pBar = ProgressBar.makeText(activity, text, duration);
        pDialog = new ProgressDialog(activity);
        pDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
        pDialog.setMessage("Loading");
        pDialog.setCancelable(false);
        pDialog.show();
      }
    });

    return pDialog;
  }

  public static void stopProgressBar(ProgressDialog dialog) {
    dialog.dismiss();
  }

  public static void makeVisible(Activity activity) {
    Window w = activity.getWindow(); // in Activity's onCreate() for
                      // instance
    int flags = /*
           * WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON |
           */WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED
        | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON;
    w.setFlags(flags, flags);
  }
}