Cómo publicar una imagen en Android

Question

Jul 09, 2012, 06:01 AM

Cómo publicar una imagen en Android

Tengo este formulario para cargar imágenes al servidor usando HttpPost. Lo hice utilizando un formulario HTML, pero no funciona con el HttpPost de Android. Responde: "No seleccionó un archivo para cargar". Parece que el campo de archivo no ha sido enviado.

<html>
<head>
<title>Upload Form</title>
</head>
<body>


<form action="http://192.168.0.151/index.php/upload/uploadFile" method="post" accept-charset="utf-8" enctype="multipart/form-data">
<input type="file" name="userfile" size="20" />

<br /><br />

<input type="submit" value="upload" />

</form>

</body>
</html>

Codigo del cliente

    final HttpClient client = new DefaultHttpClient();
    final HttpPost post = new HttpPost("http://" + hostName + "/upload/uploadFile");
    post.addHeader("enctype", "multipart/form-data");

    final List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
    nameValuePairs.add(new BasicNameValuePair("userfile", "/mnt/sdcard/Download/Photos/icecream.png"));

    try {
        final HttpEntity request = new UrlEncodedFormEntity(nameValuePairs);            
        post.setEntity(request);            

        final HttpResponse response = client.execute(post);

        // Get response body.
        final String responseBody = EntityUtils.toString(response.getEntity());
        System.out.println("RESPONSE BODY: " + responseBody);

    } catch (final UnsupportedEncodingException e) {
        e.printStackTrace();
    } catch (final ClientProtocolException e) {
        e.printStackTrace();
    } catch (final IOException e) {
        e.printStackTrace();
    }

Clase de controlador

class Upload extends CI_Controller {

    function __construct()
    {
        parent::__construct();
        $this->load->helper(array('form', 'url'));
    }

    public function showForm() {
        $this->load->view('upload_form');
    }

    public function uploadFile() {
        // Header for xml outputing.
        header('Content-type: text/xml; charset=utf-8');

        $config['upload_path'] = './uploads/';
        $config['allowed_types'] = 'gif|jpg|png';
        $config['max_size'] = '2048';
        $config['max_width']  = '2048';
        $config['max_height']  = '2048';

        $this->load->library('upload', $config);
        if ( ! $this->upload->do_upload())
        {
            // Get error message.
            $error = $this->upload->display_errors();

            // Prepare template.
            $xmlData = file_get_contents(TEMPLATE_XML_DIR . "upload_result.xml");
            $xmlData = str_replace("{IS_SUCCESSFUL}", 0, $xmlData);
            $xmlData = str_replace("{ERROR}", $error, $xmlData);
            echo $xmlData;
        }
        else
        {
            $data = array('upload_data' => $this->upload->data());
            // Prepare template.
            $xmlData = file_get_contents(TEMPLATE_XML_DIR . "upload_result.xml");
            $xmlData = str_replace("{IS_SUCCESSFUL}", 1, $xmlData);
            $xmlData = str_replace("{ERROR}", "", $xmlData);
            echo $xmlData;
        }
    }
}

.................

Solución de actualización (funciona para mi código). Recuerde agregar "httpmime-4.2.1.jar" a su ruta de compilación.

public void post(final String url, final List<NameValuePair> nameValuePairs) {
    final HttpClient httpClient = new DefaultHttpClient();
    final HttpContext localContext = new BasicHttpContext();
    final HttpPost httpPost = new HttpPost(url);

    try {
        final MultipartEntity entity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);

        for(int index=0; index < nameValuePairs.size(); index++) {
            if(nameValuePairs.get(index).getName().equalsIgnoreCase("userfile")) {
                // If the key equals to "userfile", we use FileBody to transfer the data
                entity.addPart(nameValuePairs.get(index).getName(), new FileBody(new File (nameValuePairs.get(index).getValue())));
            } else {
                // Normal string data
                entity.addPart(nameValuePairs.get(index).getName(), new StringBody(nameValuePairs.get(index).getValue()));
            }
        }

        httpPost.setEntity(entity);

        final HttpResponse response = httpClient.execute(httpPost, localContext);

        final String responseBody = EntityUtils.toString(response.getEntity());
        System.out.println("RESPONSE BODY: " + responseBody);
    } catch (final IOException e) {
        e.printStackTrace();
    }
}