Android JSON解析URL

I'm new to StackOverflow and Android altogether. I successfully parsed JSON from a direct URL

http://jsonapptest.x10host.com/index.php

The problem I'm facing is I'm trying to make everything a little more complex by adding PHP's URL ?= function. So, on a normal browser loading up :

http://jsonapptest.x10host.com/index.php?page=

works fine. In my App; it doesn't work at all (blank white screen)

public class MainActivity extends Activity{
// Log tag
private static final String TAG = MainActivity.class.getSimpleName();

// Movies json url
private static final String url = "http://jsonapptest.x10host.com/index.php?page=";
private ProgressDialog pDialog;
private List<Movie> movieList = new ArrayList<Movie>();

Please give me a hand, I'm confused.

The problem was in my index.php file. I had <HTML> and <body> tags. I removed all tags except for my <?php and it loads up fine.