解決您收到的錯誤消息最常用的解決方案是定義自定義主機名驗證。您面臨的主要問題是Google的Android網址返回的域名是* .google.com。不幸的是，這會導致一些問題，因爲Android SDK位於android.apis.google.com。 JVM默認不會驗證這個組合（* .sdk.google.com是可以接受的）。
這裏是你如何創建自己的主機名驗證的例子：
URL url = new URL("https://android.apis.google.com/c2dm/send");
HostnameVerifier hVerifier = new HostnameVerifier() {
public boolean verify(String hostname, SSLSession
session) {
return true;
}
};
HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
conn.setHostnameVerifier(hVerifier);
如果你改變你的代碼，類似上述的東西，你提到的錯誤應該糾正。
編輯
這裏是一些測試代碼，在我的開發環境中完全有效。剛剛更新了您的應用程序特定信息的身份驗證信息以運行：
public class C2DMTest {
public static void main(String... args) throws Exception {
String auth = authorize();
if (auth == null) {
System.out.println("No authorization returned");
System.exit(1);
}
sendMessage(auth);
}
/**
* Perform an authorization request to access Google's C2DM
* API.
*
* @return The retrieved authorization request.
*/
private static String authorize() throws Exception {
String accountType = "GOOGLE";
String service = "ac2dm";
String source = "replace-me";
String email = "replace-me";
String passwd = "replace-me";
StringBuilder params = new StringBuilder();
params.append("accountType=").append(accountType)
.append("&Email=").append(URLEncoder.encode(email, UTF8))
.append("&Passwd=").append(URLEncoder.encode(passwd, UTF8))
.append("&service=").append(service)
.append("&source=").append(source);
byte[] postData = params.toString().getBytes(UTF8);
URL url = new URL("https://www.google.com/accounts/ClientLogin");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
conn.setRequestProperty("Content-Length", Integer.toString(postData.length));
//------------------
OutputStream out = conn.getOutputStream();
//--------------------------
out.write(postData);
out.close();
int sw = conn.getResponseCode();
System.out.println("" + sw);
switch (sw) {
case 503:
System.out.println("Service unavailable");
break;
case 401:
System.out.println(" Invalid authentication token");
break;
default:
ByteArrayOutputStream baos = new ByteArrayOutputStream();
InputStream in = conn.getInputStream();
byte[] bytes = new byte[100];
int len = -1;
while ((len = in.read(bytes)) != -1) {
baos.write(bytes, 0, len);
}
in.close();
String input = baos.toString();
Map<String, String> res = parseResponse(input);
return res.get("Auth");
}
return null;
}
/**
* Parses a response string into a usable data map.
*
* @param response The response from Google
* @return A Map representation.
*/
private static Map<String, String> parseResponse(String response) {
Map<String, String> map = new HashMap<String, String>();
if (response != null) {
String[] lines = response.split("\n");
for (String line : lines) {
String[] parts = line.split("=");
if (parts.length == 2) {
map.put(parts[0], parts[1]);
}
}
}
return map;
}
private static String UTF8 = "UTF-8";
/**
* Send message to mobile device.
*
* @param cl Google API auth code.
*/
public static void sendMessage(String cl) throws IOException {
String key = "invalid";
StringBuilder postDataBuilder = new StringBuilder();
postDataBuilder.append("registration_id").append("=").append(key);
postDataBuilder.append("&").append("collapse_key").append("=").append("0");
postDataBuilder.append("&").append("data.payload").append("=").append(URLEncoder.encode("test-content", UTF8));
byte[] postData = postDataBuilder.toString().getBytes(UTF8);
URL url = new URL("https://android.apis.google.com/c2dm/send");
HostnameVerifier hVerifier = new HostnameVerifier() {
public boolean verify(String hostname, SSLSession
session) {
return true;
}
};
HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
conn.setHostnameVerifier(hVerifier);
conn.setDoOutput(true);
conn.setUseCaches(false);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
conn.setRequestProperty("Content-Length", Integer.toString(postData.length));
conn.setRequestProperty("Authorization", "GoogleLogin auth="+cl);
//------------------
OutputStream out = conn.getOutputStream();
//--------------------------
out.write(postData);
out.close();
int sw = conn.getResponseCode();
System.out.println("" + sw);
switch (sw) {
case 200:
System.out.println("Success, but check for errors in the body");
break;
case 503:
System.out.println("Service unavailable");
break;
case 401:
System.out.println(" Invalid authentication token");
break;
}
}
}
什麼是IOException發出的消息？或者它沒有消息？ – 2011-06-09 17:59:47
如果您發佈了實際的錯誤消息和堆棧跟蹤，這將有助於找出問題。 – 2011-06-09 18:00:35
它只從catch中顯示「Communication Server問題」（IOException e） \t { \t System.err.println（「通信服務器問題」）; \t System.exit（1）; \t}。 SendMessage對象位於另一個類中的try-catch內。 – Misca 2011-06-09 18:12:49