Java GCM推送通知不会传递到设备

我们（帕诺斯和雷纳-见下面的评论）有一台服务器和几个安卓设备

我们希望通过GCM将推送通知从服务器发送到Android设备

现在我们向GCM服务器发出post请求。GCM服务器的响应是一切正常（success==1，甚至消息id）！ 但推送通知从未发送到设备

如果我们使用相同的数据和Chrome插件邮递员，通知会立即发送

我们尝试了很多不同的解决方案。我们总是收到GCM服务器的反馈，表示一切正常，但推送通知不会发送

我们也试过这个：

是用于邮递员请求的数据，该请求工作正常。 Rainer已经提到，我们在Java端尝试了几种实现，似乎我们始终能够与服务通信，并收到迄今为止看起来正确的响应：

{
    "multicast_id":7456542468425129822,
    "success":1,
    "failure":0,
    "canonical_ids":0,
    "results":
    [{
        "message_id":"0:1457548597263237%39c590d7f9fd7ecd"
    }]
} 

---

不确定我是否在正确的轨道上，但您是指下游HTTP消息（纯文本）

尝试将以下JSON发送到服务（来自Postman），再次得到肯定响应，但这次通知没有到达设备（为了说明这一点，目前设备上没有应用程序主动监听传入的通知->首先，我们只想确保它们通常到达设备上）：

---

感谢大家在这里提供的帮助，但老实说，这个问题确实令人沮丧。与接口\服务通信时，如果请求中包含可能会最终阻止GCM向设备发送推送通知的有害内容，则该接口\服务似乎无法返回有用的响应，这让人感觉很痛苦。I如果邮递员也会不及格，我会说，好吧，你不能这么傻：-）

下面是我们已经使用过的一些快速脏的实现

范例

    try 
    {
       URL url = new URL(apiUrl);
       HttpsURLConnection conn = (HttpsURLConnection);//also tried HttpURLConnection
       url.openConnection();
       conn.setDoOutput(true);
       conn.setRequestMethod("POST");
       conn.setRequestProperty("Content-Type", "application/json");
       conn.setRequestProperty("Authorization", "key="+apiKey);

       conn.setDoOutput(true);

       String json = "{\"priority\":\"high\",\"notification\":{\"title\":\"Some title\",\"text\":\"Some text\"},\"to\":\""+deviceToken+"\"}";

       OutputStream os = conn.getOutputStream();
       os.write(json.getBytes());
       os.flush();
   }
   catch(Exception exc)
   {
     System.out.println("Error while trying to send push notification: "+exc);
   }

HttpClient httpClient = HttpClientBuilder.create().build(); 

try 
{
    HttpPost request = new HttpPost(apiUrl);
    StringEntity params =new StringEntity("{\"priority\":\"high\",\"notification\":{\title\":\"Some title\",\"text\":\"Some text\"},\"to\":\""+deviceToken+"\"}");
    request.addHeader("Content-Type", "application/json");
    request.addHeader("Authorization", "key="+apiKey);
    request.setEntity(params);
    HttpResponse response = httpClient.execute(request);

    // check response
    System.out.println(response.getStatusLine().toString());
}catch (Exception exc) {
    System.out.println("Error while trying to send push notification: "+exc);
} finally {
    httpClient.getConnectionManager().shutdown(); //Deprecated
}

try
{
    String charset = "UTF-8"; 
    URLConnection connection = new URL(apiUrl).openConnection();
    connection.setDoOutput(true);
    connection.setRequestProperty("Accept-Charset", charset);
    connection.setRequestProperty("Content-Type", "application/json;charset=" + charset);
    connection.setRequestProperty("Authorization", "key="+apiKey);

    String param = "{\"priority\":\"high\",\"notification\":{\"title\":\"Some title\",\"text\":\"Some text\"},\"to\":\""+deviceToken+"\"}";
    try (OutputStream output = connection.getOutputStream()) 
    {
        output.write(param.getBytes(charset));
    }

    InputStream response = connection.getInputStream();
}
catch(Exception exc)
{
    System.out.println("Error while trying to send push notification: "+exc);
}

try 
{
    // prepare JSON
    JSONObject jGcmData = new JSONObject();
    JSONObject jData = new JSONObject();

    jData.put("message", "{ \"data\": {\"score\": \"5x1\",\"time\": \"15:10\"},\"to\" : \""+deviceToken+"\"}");

    jGcmData.put("to", deviceToken);

    jGcmData.put("data", jData);

    // Create connection to send GCM Message request.
    URL url = new URL("https://android.googleapis.com/gcm/send");
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setRequestProperty("Authorization", "key=" + apiKey);
    conn.setRequestProperty("Content-Type", "application/json");
    conn.setRequestMethod("POST");
    conn.setDoOutput(true);

    // Send GCM message content.
    OutputStream outputStream = conn.getOutputStream();
    outputStream.write(jGcmData.toString().getBytes());

    // Read GCM response.
    InputStream inputStream = conn.getInputStream();
    String resp = IOUtils.toString(inputStream);
    System.out.println(resp);
 } catch (IOException e) {
    System.out.println("Unable to send GCM message. "+e);
}

范例

    try 
    {
       URL url = new URL(apiUrl);
       HttpsURLConnection conn = (HttpsURLConnection);//also tried HttpURLConnection
       url.openConnection();
       conn.setDoOutput(true);
       conn.setRequestMethod("POST");
       conn.setRequestProperty("Content-Type", "application/json");
       conn.setRequestProperty("Authorization", "key="+apiKey);

       conn.setDoOutput(true);

       String json = "{\"priority\":\"high\",\"notification\":{\"title\":\"Some title\",\"text\":\"Some text\"},\"to\":\""+deviceToken+"\"}";

       OutputStream os = conn.getOutputStream();
       os.write(json.getBytes());
       os.flush();
   }
   catch(Exception exc)
   {
     System.out.println("Error while trying to send push notification: "+exc);
   }

HttpClient httpClient = HttpClientBuilder.create().build(); 

try 
{
    HttpPost request = new HttpPost(apiUrl);
    StringEntity params =new StringEntity("{\"priority\":\"high\",\"notification\":{\title\":\"Some title\",\"text\":\"Some text\"},\"to\":\""+deviceToken+"\"}");
    request.addHeader("Content-Type", "application/json");
    request.addHeader("Authorization", "key="+apiKey);
    request.setEntity(params);
    HttpResponse response = httpClient.execute(request);

    // check response
    System.out.println(response.getStatusLine().toString());
}catch (Exception exc) {
    System.out.println("Error while trying to send push notification: "+exc);
} finally {
    httpClient.getConnectionManager().shutdown(); //Deprecated
}

try
{
    String charset = "UTF-8"; 
    URLConnection connection = new URL(apiUrl).openConnection();
    connection.setDoOutput(true);
    connection.setRequestProperty("Accept-Charset", charset);
    connection.setRequestProperty("Content-Type", "application/json;charset=" + charset);
    connection.setRequestProperty("Authorization", "key="+apiKey);

    String param = "{\"priority\":\"high\",\"notification\":{\"title\":\"Some title\",\"text\":\"Some text\"},\"to\":\""+deviceToken+"\"}";
    try (OutputStream output = connection.getOutputStream()) 
    {
        output.write(param.getBytes(charset));
    }

    InputStream response = connection.getInputStream();
}
catch(Exception exc)
{
    System.out.println("Error while trying to send push notification: "+exc);
}

try 
{
    // prepare JSON
    JSONObject jGcmData = new JSONObject();
    JSONObject jData = new JSONObject();

    jData.put("message", "{ \"data\": {\"score\": \"5x1\",\"time\": \"15:10\"},\"to\" : \""+deviceToken+"\"}");

    jGcmData.put("to", deviceToken);

    jGcmData.put("data", jData);

    // Create connection to send GCM Message request.
    URL url = new URL("https://android.googleapis.com/gcm/send");
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setRequestProperty("Authorization", "key=" + apiKey);
    conn.setRequestProperty("Content-Type", "application/json");
    conn.setRequestMethod("POST");
    conn.setDoOutput(true);

    // Send GCM message content.
    OutputStream outputStream = conn.getOutputStream();
    outputStream.write(jGcmData.toString().getBytes());

    // Read GCM response.
    InputStream inputStream = conn.getInputStream();
    String resp = IOUtils.toString(inputStream);
    System.out.println(resp);
 } catch (IOException e) {
    System.out.println("Unable to send GCM message. "+e);
}

范例

    try 
    {
       URL url = new URL(apiUrl);
       HttpsURLConnection conn = (HttpsURLConnection);//also tried HttpURLConnection
       url.openConnection();
       conn.setDoOutput(true);
       conn.setRequestMethod("POST");
       conn.setRequestProperty("Content-Type", "application/json");
       conn.setRequestProperty("Authorization", "key="+apiKey);

       conn.setDoOutput(true);

       String json = "{\"priority\":\"high\",\"notification\":{\"title\":\"Some title\",\"text\":\"Some text\"},\"to\":\""+deviceToken+"\"}";

       OutputStream os = conn.getOutputStream();
       os.write(json.getBytes());
       os.flush();
   }
   catch(Exception exc)
   {
     System.out.println("Error while trying to send push notification: "+exc);
   }

HttpClient httpClient = HttpClientBuilder.create().build(); 

try 
{
    HttpPost request = new HttpPost(apiUrl);
    StringEntity params =new StringEntity("{\"priority\":\"high\",\"notification\":{\title\":\"Some title\",\"text\":\"Some text\"},\"to\":\""+deviceToken+"\"}");
    request.addHeader("Content-Type", "application/json");
    request.addHeader("Authorization", "key="+apiKey);
    request.setEntity(params);
    HttpResponse response = httpClient.execute(request);

    // check response
    System.out.println(response.getStatusLine().toString());
}catch (Exception exc) {
    System.out.println("Error while trying to send push notification: "+exc);
} finally {
    httpClient.getConnectionManager().shutdown(); //Deprecated
}

try
{
    String charset = "UTF-8"; 
    URLConnection connection = new URL(apiUrl).openConnection();
    connection.setDoOutput(true);
    connection.setRequestProperty("Accept-Charset", charset);
    connection.setRequestProperty("Content-Type", "application/json;charset=" + charset);
    connection.setRequestProperty("Authorization", "key="+apiKey);

    String param = "{\"priority\":\"high\",\"notification\":{\"title\":\"Some title\",\"text\":\"Some text\"},\"to\":\""+deviceToken+"\"}";
    try (OutputStream output = connection.getOutputStream()) 
    {
        output.write(param.getBytes(charset));
    }

    InputStream response = connection.getInputStream();
}
catch(Exception exc)
{
    System.out.println("Error while trying to send push notification: "+exc);
}

try 
{
    // prepare JSON
    JSONObject jGcmData = new JSONObject();
    JSONObject jData = new JSONObject();

    jData.put("message", "{ \"data\": {\"score\": \"5x1\",\"time\": \"15:10\"},\"to\" : \""+deviceToken+"\"}");

    jGcmData.put("to", deviceToken);

    jGcmData.put("data", jData);

    // Create connection to send GCM Message request.
    URL url = new URL("https://android.googleapis.com/gcm/send");
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setRequestProperty("Authorization", "key=" + apiKey);
    conn.setRequestProperty("Content-Type", "application/json");
    conn.setRequestMethod("POST");
    conn.setDoOutput(true);

    // Send GCM message content.
    OutputStream outputStream = conn.getOutputStream();
    outputStream.write(jGcmData.toString().getBytes());

    // Read GCM response.
    InputStream inputStream = conn.getInputStream();
    String resp = IOUtils.toString(inputStream);
    System.out.println(resp);
 } catch (IOException e) {
    System.out.println("Unable to send GCM message. "+e);
}

范例

    try 
    {
       URL url = new URL(apiUrl);
       HttpsURLConnection conn = (HttpsURLConnection);//also tried HttpURLConnection
       url.openConnection();
       conn.setDoOutput(true);
       conn.setRequestMethod("POST");
       conn.setRequestProperty("Content-Type", "application/json");
       conn.setRequestProperty("Authorization", "key="+apiKey);

       conn.setDoOutput(true);

       String json = "{\"priority\":\"high\",\"notification\":{\"title\":\"Some title\",\"text\":\"Some text\"},\"to\":\""+deviceToken+"\"}";

       OutputStream os = conn.getOutputStream();
       os.write(json.getBytes());
       os.flush();
   }
   catch(Exception exc)
   {
     System.out.println("Error while trying to send push notification: "+exc);
   }

HttpClient httpClient = HttpClientBuilder.create().build(); 

try 
{
    HttpPost request = new HttpPost(apiUrl);
    StringEntity params =new StringEntity("{\"priority\":\"high\",\"notification\":{\title\":\"Some title\",\"text\":\"Some text\"},\"to\":\""+deviceToken+"\"}");
    request.addHeader("Content-Type", "application/json");
    request.addHeader("Authorization", "key="+apiKey);
    request.setEntity(params);
    HttpResponse response = httpClient.execute(request);

    // check response
    System.out.println(response.getStatusLine().toString());
}catch (Exception exc) {
    System.out.println("Error while trying to send push notification: "+exc);
} finally {
    httpClient.getConnectionManager().shutdown(); //Deprecated
}

try
{
    String charset = "UTF-8"; 
    URLConnection connection = new URL(apiUrl).openConnection();
    connection.setDoOutput(true);
    connection.setRequestProperty("Accept-Charset", charset);
    connection.setRequestProperty("Content-Type", "application/json;charset=" + charset);
    connection.setRequestProperty("Authorization", "key="+apiKey);

    String param = "{\"priority\":\"high\",\"notification\":{\"title\":\"Some title\",\"text\":\"Some text\"},\"to\":\""+deviceToken+"\"}";
    try (OutputStream output = connection.getOutputStream()) 
    {
        output.write(param.getBytes(charset));
    }

    InputStream response = connection.getInputStream();
}
catch(Exception exc)
{
    System.out.println("Error while trying to send push notification: "+exc);
}

try 
{
    // prepare JSON
    JSONObject jGcmData = new JSONObject();
    JSONObject jData = new JSONObject();

    jData.put("message", "{ \"data\": {\"score\": \"5x1\",\"time\": \"15:10\"},\"to\" : \""+deviceToken+"\"}");

    jGcmData.put("to", deviceToken);

    jGcmData.put("data", jData);

    // Create connection to send GCM Message request.
    URL url = new URL("https://android.googleapis.com/gcm/send");
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setRequestProperty("Authorization", "key=" + apiKey);
    conn.setRequestProperty("Content-Type", "application/json");
    conn.setRequestMethod("POST");
    conn.setDoOutput(true);

    // Send GCM message content.
    OutputStream outputStream = conn.getOutputStream();
    outputStream.write(jGcmData.toString().getBytes());

    // Read GCM response.
    InputStream inputStream = conn.getInputStream();
    String resp = IOUtils.toString(inputStream);
    System.out.println(resp);
 } catch (IOException e) {
    System.out.println("Unable to send GCM message. "+e);
}

---

您也可以发布您使用的URL。有一个新的GCM enpoint，如下所示：

我还不确定是什么导致了你这边的问题。但是，以下各项已经过测试并正在发挥作用：

public class Main {

    public static void main(String[] args) {
    // write your code here

        try {

            String url = "https://gcm-http.googleapis.com/gcm/send";

            URL obj = new URL(url);
            HttpsURLConnectionImpl conn = (HttpsURLConnectionImpl) obj.openConnection();


            conn.setRequestProperty("Content-Type", "application/json");
            conn.setDoOutput(true);

            conn.setRequestMethod("POST");
            conn.setRequestProperty ("Authorization", "key=***");

            String title = "Short title";
            String body = "A body :D";
            String token = "****";
            String data =  "{ \"notification\": { \"title\": \"" + title +"\", \"body\": \"" + body + "\" }, \"to\" : \"" + token + "\", \"priority\" : \"high\" }";
            OutputStreamWriter out = new OutputStreamWriter(conn.getOutputStream());
            out.write(data);
            out.close();

            String text = getText(new InputStreamReader(conn.getInputStream()));
            System.out.println(text);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static String getText(InputStreamReader in) throws IOException {
        StringBuilder sb=new StringBuilder();
        BufferedReader br = new BufferedReader(in);
        String read;
        while((read=br.readLine()) != null) {
            sb.append(read);
        }
        br.close();
        return sb.toString();
    }
}

---

迈克，以你为例，这对我们也有好处。在将您的实现与我们这边的比较之后，我发现唯一真正的区别是使用的URL！！ 不知何故，我们的Java实现中使用的URL是

看来这是对的，顺便说一下，它也被用于我们的邮递员测试

---

但是为什么我们失败测试的URL仍然有效并返回响应呢

在json中将优先级设置为high对我来说解决了这个问题

'registration_ids' => $id,
'priority' => 'high',
'data' => $load

---

在我们的案例中，客户端Android设备存在间歇性互联网连接问题，即网络中断，从而导致通知传递失败。我们使用以下JAVA GCM代码解决了可靠性问题：

gcmPayload.setTime_to_live(messageExpiryTime); //in seconds. Set notification message expiry to give user time to receive it in case they have intermittent internet connection, or phone was off
gcmPayload.setPriority("high");

和APNS代码：

ApnsService apnsService = APNS.newService().withCert(certificateStream, configurations.getApnPassword()).withProductionDestination().build();
PayloadBuilder payloadBuilder = APNS.newPayload();
...
payloadBuilder.instantDeliveryOrSilentNotification(); //same as content-available=true
String payload = payloadBuilder.build();

Integer now =  (int)(new Date().getTime()/1000);
//use EnhancedApnsNotification to set message expiry time
for(String deviceToken : deviceTokens) {
    EnhancedApnsNotification notification = new EnhancedApnsNotification(EnhancedApnsNotification.INCREMENT_ID() /* Next ID */,
        now + messageExpiryTime /* Expiry time in seconds */,
        deviceToken /* Device Token */,
        payload);
        apnsService.push(notification);
}

---

如果你的后端服务器时间不同于客户端移动应用程序时间，请记住考虑时区。

你能分享一些关于邮递员请求的代码和更多信息吗？设备上安装了谷歌播放服务吗？您的防火墙是否允许通过tcp 5228-5230进行空闲连接？如果连接断开，gcm服务最多需要15分钟才能重新连接。全部已安装。港口开放。我们尝试了wifi和手机网络。当我们通过邮递员发送时，我们会收到推送通知。如果您通过邮递员接收到通知，那么在设备端一切正常。能否添加用于发送设备未接收到的请求的代码？我猜想HTTP请求与您的代码有所不同。您是否可以尝试向设备发送一条非通知消息，并查看您是否在Gcm服务中收到该消息（可能添加一条

Log

语句）。