Question

In my Android:

    String cat_id = getIntent().getExtras().getString("category_id");

    ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
    nameValuePairs.add(new BasicNameValuePair("cat_id", cat_id));

    try {
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost(
                "http://www.---.com/items.php");
        httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
        HttpResponse response = httpclient.execute(httppost);
        HttpEntity entity = response.getEntity();
        is = entity.getContent();
    } catch (Exception e) {
        Log.e("log_tag", "Error in http connection" + e.toString());
    }

In my PHP:

// editing out DB connections which have been verified to work


 <?php
$sql=mysql_query("SELECT * FROM items WHERE cat_id = '".$_REQUEST['cat_id']."'");
while($row=mysql_fetch_assoc($sql))
    $output[]=$row;
print(json_encode($output));
mysql_close();
 ?>

So my issues is that It is returning nothing (in the JSON result part — a Toast says “No item is found”). Is my code correct, the way I am passing parameters from Android to PHP?

Answer 1

I figured out what was and it was nobody’s fault for not answering.

The issue started before Java passed on to PHP. It was a bundle that passed into the Java Activity in question. I had a simple mistake involving using an incorrect primitive which in turn caused a null to be passed in through a bundle.

The null continued down the path and landed in the PHP part. So the code shown above is actually correct.