Lesson 46: android connect using HTTP GET

the main code for connecting to server using GET :

public static String GET(String url){
    InputStream inputStream = null;
    String result = "";
    try {

        // create HttpClient
        HttpClient httpclient = new DefaultHttpClient();

        // make GET request to the given URL
        HttpResponse httpResponse = httpclient.execute(new HttpGet(url));

        // receive response as inputStream
        inputStream = httpResponse.getEntity().getContent();

        // convert inputstream to string
        if(inputStream != null)
            result = convertInputStreamToString(inputStream);
        else
            result = "Did not work!";

    } catch (Exception e) {
        Log.d("InputStream", e.getLocalizedMessage());
    }

    return result;
}

EDIT:
For network operation we better run it on separate thread using this piece of code:

private class HttpAsyncTask extends AsyncTask<String, Void, String> {
    protected String doInBackground(String... urls) {
        return GET(urls[0]);
    }
    // onPostExecute displays the results of the AsyncTask.
    protected void onPostExecute(String result) {
        Toast.makeText(getBaseContext(), "Received!", Toast.LENGTH_LONG).show();
        etResponse.setText(result);
    }
}

full code can be found on this link
(credit goes to the original author)