void showErrorMessage(String title, String message) {
	  new AlertDialog.Builder(this)
	    .setTitle(title)
	    .setMessage(message)
	    .setOnCancelListener(new FinishListener(this))
	    .setPositiveButton( "Done", new FinishListener(this))
	    .show();
  }
Displays an error message dialog box to the user on the UI thread.

@param title The title for the dialog box
@param message The error message to be displayed
OCRTest/src/main/java/edu/sfsu/cs/orange/ocr/CaptureActivity.java