Android C2DM无法链接客户端和服务器

Question

我已经提到了 Vogella Android C2DM 教程 并按如下方式实现客户端和服务器。

我在应用程序中使用 3 个 URL，其中 1 个在客户端，2 个在服务器中遇到问题。

应该有我创建的服务器地址来代替第一个 URL。但我不知道到底该放什么。

其余 2 个 URL（google 的子 URL）无法正常访问。

我通过用

//================================= 括起来来突出显示这 3 个 URL 的用法===========================================

并对它们进行编号。

请注意，我可以在客户端注册，但无法接收任何消息。

在服务器端，我获得了身份验证，但是当我尝试发送消息时，它给出了 UnknownHostException。

我知道我对这个问题很不清楚，但在 Android C2DM 开发 方面我绝对是初学者。

任何帮助表示赞赏。

如果有的话建议改变。

客户端代码片段（C2DMRegistrationReceiver.java）

public void sendRegistrationIdToServer(String deviceId,
        String registrationId) {
    Log.d("C2DM", "Sending registration ID to my application server");
    HttpClient client = new DefaultHttpClient();
    HttpPost post;

  // 1.) ========================================================================
 post = new HttpPost("http://vogellac2dm.appspot.com/register");
  //=============================================================================
        List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(1);
        // Get the deviceID
        nameValuePairs.add(new BasicNameValuePair("deviceid", deviceId));
        nameValuePairs.add(new BasicNameValuePair("registrationid",
                registrationId));

        post.setEntity(new UrlEncodedFormEntity(nameValuePairs));
        HttpResponse response = client.execute(post);
        BufferedReader rd = new BufferedReader(new InputStreamReader(
                response.getEntity().getContent()));
}

服务器代码片段

public class ServerSimulator extends Activity {
    private SharedPreferences prefManager;
    private final static String AUTH = "authentication";
    private static final String UPDATE_CLIENT_AUTH = "Update-Client-Auth";
    public static final String PARAM_REGISTRATION_ID = "registration_id";
    public static final String PARAM_DELAY_WHILE_IDLE = "delay_while_idle";
    public static final String PARAM_COLLAPSE_KEY = "collapse_key";
    private static final String UTF8 = "UTF-8";

    // Registration is currently hardcoded
    private final static String YOUR_REGISTRATION_STRING = "APA91bFQut1tqA-nIL1ZaV0emnp4Rb0smwCkrMHcoYRXeYVtIebJgrzOHQj0h76qKRzd3bC_JO37uJ0NgTcFO87HS9V7YC-yOP774pm0toppTHFO7Zc_PAw";

    private SharedPreferences prefs;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        prefManager = PreferenceManager.getDefaultSharedPreferences(this);
    }

    public void getAuthentification(View view) {
        SharedPreferences prefs = PreferenceManager
                .getDefaultSharedPreferences(this);

        HttpClient client = new DefaultHttpClient();
  // 2.) ==========================================================================
        HttpPost post = new HttpPost(
                "https://www.google.com/accounts/ClientLogin");
  //==============================================================================

        try {

            List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(1);
            nameValuePairs.add(new BasicNameValuePair("Email", prefs.getString(
                    "user", "[email protected]")));
            nameValuePairs.add(new BasicNameValuePair("Passwd", prefs
                    .getString("password", "myPassword")));
            nameValuePairs.add(new BasicNameValuePair("accountType", "GOOGLE"));
            nameValuePairs.add(new BasicNameValuePair("source",
                    "Google-cURL-Example"));
            nameValuePairs.add(new BasicNameValuePair("service", "ac2dm"));

            post.setEntity(new UrlEncodedFormEntity(nameValuePairs));
            HttpResponse response = client.execute(post);
            BufferedReader rd = new BufferedReader(new InputStreamReader(
                    response.getEntity().getContent()));

            String line = "";
            while ((line = rd.readLine()) != null) {
                Log.e("HttpResponse", line);
                if (line.startsWith("Auth=")) {
                    Editor edit = prefManager.edit();
                    edit.putString(AUTH, line.substring(5));
                    edit.commit();
                    String s = prefManager.getString(AUTH, "n/a");
                    Toast.makeText(this, s, Toast.LENGTH_LONG).show();
                }

            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void sendMessage(View view) {
        try {
            Log.e("sendMessage", "Started");
            String auth_key = prefManager.getString(AUTH, "n/a");
            // Send a sync message to this Android device.
            StringBuilder postDataBuilder = new StringBuilder();
            postDataBuilder.append(PARAM_REGISTRATION_ID).append("=")
                    .append(YOUR_REGISTRATION_STRING);

            postDataBuilder.append("&").append(PARAM_COLLAPSE_KEY).append("=")
                    .append("0");

            postDataBuilder.append("&").append("data.payload").append("=")
                    .append(URLEncoder.encode("Lars war hier", UTF8));

            byte[] postData = postDataBuilder.toString().getBytes(UTF8);

            // Hit the dm URL.
  // 3.) ==========================================================================
            URL url = new URL("https://android.clients.google.com/c2dm/send");
  //===============================================================================

            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setDoOutput(true);
            conn.setUseCaches(false);
            conn.setRequestMethod("POST");
            conn.setRequestProperty("Content-Type",
                    "application/x-www-form-urlencoded;charset=UTF-8");
            conn.setRequestProperty("Content-Length",
                    Integer.toString(postData.length));
            conn.setRequestProperty("Authorization", "GoogleLogin auth="
                    + auth_key);

            OutputStream out = conn.getOutputStream();
            out.write(postData);
            out.close();

            int responseCode = conn.getResponseCode();

            Log.e("Response Code=", String.valueOf(responseCode));
            // Validate the response code
            // Check for updated token header
            String updatedAuthToken = conn.getHeaderField(UPDATE_CLIENT_AUTH);
            if (updatedAuthToken != null && !auth_key.equals(updatedAuthToken)) {
                Log.i("C2DM",
                        "Got updated auth token from datamessaging servers: "
                                + updatedAuthToken);
                Editor edit = prefManager.edit();
                edit.putString(AUTH, updatedAuthToken);
            }

            String responseLine = new BufferedReader(new InputStreamReader(
                    conn.getInputStream())).readLine();

            String[] responseParts = responseLine.split("=", 2);
            if (responseParts.length != 2) {
                Log.e("C2DM", "Invalid message from google: " + responseCode
                        + " " + responseLine);
                throw new IOException("Invalid response from Google "
                        + responseCode + " " + responseLine);
            }

            if (responseParts[0].equals("id")) {
                Log.i("Tag", "Successfully sent data message to device: "
                        + responseLine);
            }

            if (responseParts[0].equals("Error")) {
                String err = responseParts[1];
                Log.w("C2DM",
                        "Got error response from Google datamessaging endpoint: "
                                + err);
                // No retry.
                throw new IOException(err);
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}

Answer 1

对于 URL 1，您需要在服务器上实现某种数据存储，该数据存储可以接收来自注册手机的请求并存储其注册 ID，以便您稍后可以向它们发送 c2dm 通知。就我而言，我使用了 apache2 服务器，它通过 https 接受 xml。

对于 URL 2，听起来您已经可以正常工作了，因为您说“在服务器端，我获得了身份验证”。您到底想在这里寻找什么？

对于网址 3，您应该使用 https://android.apis.google.com/c2dm/send 根据google c2dm 文档。虽然你使用的地址对我来说是解析。请注意，谷歌用于上述网址的 ssl 证书是错误的，并且无法正确验证，因此如果您尝试安全地发送通知，则可能会遇到这种情况。测试时您的模拟器/手机是否可以访问互联网？我不确定为什么您会收到该网址的 UnknownHost 异常。