Code
// A function to display an Alert Dialog with title, message and an OK button. public static void showDialog(final Context context, final String title, final String message) { MainThread.run(context, new Runnable() { @Override public void run() { AlertDialog.Builder builder = new AlertDialog.Builder(context); builder.setTitle(title); builder.setMessage(message); DialogInterface.OnClickListener buttonListener = new DialogInterface.OnClickListener() { // upon click, close it @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); } }; // set the buttons builder.setPositiveButton("Ok", buttonListener); // display it builder.show(); } }); }