Question

I have an Android java method that calls a remote php to insert data into a mysql table.

This is java code client side:

public static void insert(String email1, String email2) {
    List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
    nameValuePairs.add(new BasicNameValuePair("email1", email1));
    nameValuePairs.add(new BasicNameValuePair("email2", email2));

    try {
        DefaultHttpClient httpClient = new DefaultHttpClient();
        HttpPost httpPost = new HttpPost("myserver:8080/insert.php");
        httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
        HttpResponse httpResponse = httpClient.execute(httpPost);
        HttpEntity httpEntity = httpResponse.getEntity();
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    } catch (ClientProtocolException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    //How to catch and print php echo() here??
}

and this is the insert.php server side (re-edited):

<?php   
    $mysqli_connection = new mysqli("localhost:3306", "root", "password", "mydb");
    if ($mysqli_connection->connect_errno) {
        echo ("Connection Failure");
        exit();
    }


    $stmt = $mysqli->stmt_init();
    if ($stmt->prepare("INSERT INTO `mytable` (`email1`, `email2`) VALUES (?,?)")) {
        echo 'Success';
        $stmt->bind_param("ss", $_GET['email1'], $_GET['email2']);
        $stmt->execute();
        $stmt->close();
    } else {
        echo 'Error Inserting Content';
    }

    $mysqli->close();   
?>

When I call my java insert() method, no exception is returned, but no insert is done and mytable is empty.

• 1) What is wrong?
• 2) How can I see which error occured? How can I see a “log” of the the php-side execution?

Thank you very much.
Geltry

Answer 1

Look into your HttpResponse/HttpEntity. There you should see either ‘Success’ or ‘Error Inserting Content’. You can also add the concrete errno and error string in your response to see, what’s really going wrong.

You also mix HTTP POST and HTTP GET in your request. On the client side you use a HttpPost object and on the server side you expect the _GET variables to be set. You must use either GET or POST on both sides. Otherwise client and server won’t understand each other.

With HttpEntity.getContent() you can read from an InputStream. Another approach would be to use EntityUtils.toString() to get a string representation of the response’s content.